Full vulnerability report · 2026

CVE-2026-43249High confidence

9p/xen: protect xen_9pfs_front_free against concurrent calls

Linux · Linux

8.8HighCVSS 3.1

Recommended action

Patch only the product branches with a verified fix

High technical severity; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 21 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product

Operational reassessment

Published severity in operational context

Open reassessment dashboard →

Published severityHighOperational priority:High, unchanged from published severity.unchanged

Evidence used

No CISA KEV confirmation is currently recorded.
EPSS is 0.38% for the current model date.

Compensating controls

Validate the affected product branch and deploy the verified fixed release.
Restrict local access and enforce least privilege on affected hosts.
Monitor vendor guidance and exploitation sources for a material change.

Verification

Confirm that the asset runs Linux Linux and falls inside the recorded affected range.
Verify the installed build against the product-specific fixed version after deployment.
Validate exposure, authentication requirements and compensating controls in the actual environment.
Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.

Cross-source reconciliation

Remediation availability differs by product scope

Verified remediation exists for at least one product or source, but 21 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Debian Security Tracker, Canonical Ubuntu Security: 21 affected package states with no published fix

Distribution package intelligence

Release-specific package status

Debian, ubuntu findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

24 package states

Package result overrides the generic status

BlackTree has verified remediation for at least one product or source, but the relevant distribution still reports no fixed package for 21 affected package states shown here. Treat those rows as affected with no fix until that distribution publishes a fixed version.

Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Distribution release	Source package	Vendor state	Fixed version	Evidence
Debian trixietrixie · source	`linux`	Vendor fix publishedDebian records a fixed source-package version for this release.	`6.12.85-1`	Debian Security Tracker ↗Source updated 5 Oct 2026
Debian bookwormbookworm · source	`linux`	Affected, no fix publishedDebian currently tracks this release as open.	`Not published in this feed`	Debian Security Tracker ↗Source updated 5 Oct 2026
Debian forkyforky · source	`linux`	Vendor fix publishedDebian records a fixed source-package version for this release.	`6.19.6-1`	Debian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · source	`linux`	Vendor fix publishedDebian records a fixed source-package version for this release.	`6.19.6-1`	Debian Security Tracker ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-aws`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-azure`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-azure-fde`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-azure-nvidia`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-gcp`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-gke`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-gkeop`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-ibm`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-lowlatency`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-nvidia`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-nvidia-lowlatency`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-nvidia-tegra`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-oem-6.11`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-oracle`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-raspi`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-raspi-realtime`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-realtime`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-riscv`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-xilinx`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical Ubuntu Security ↗Source updated 5 Oct 2026

Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current

CVE-2026-43249 · CSAF 2.0 · revision 18 · interimSUSE Product Security TeamCVE-2026-43249

47 known affected

The vendor explicitly identifies these products as affected by this CVE.

cluster-md-kmp-default as component of SUSE Linux Enterprise Server 15 SP6-LTSS
dlm-kmp-default as component of SUSE Linux Enterprise Server 15 SP6-LTSS
gfs2-kmp-default as component of SUSE Linux Enterprise Server 15 SP6-LTSS
kernel-default as component of SUSE Linux Enterprise Server 15 SP6-LTSS
kernel-default-devel as component of SUSE Linux Enterprise Server 15 SP6-LTSS
kernel-devel as component of SUSE Linux Enterprise Server 15 SP6-LTSS
kernel-macros as component of SUSE Linux Enterprise Server 15 SP6-LTSS
kernel-source as component of SUSE Linux Enterprise Server 15 SP6-LTSS
ocfs2-kmp-default as component of SUSE Linux Enterprise Server 15 SP6-LTSS
reiserfs-kmp-default as component of SUSE Linux Enterprise Server 15 SP6-LTSS
cluster-md-kmp-default as component of SUSE Linux Enterprise Server 15 SP6
dlm-kmp-default as component of SUSE Linux Enterprise Server 15 SP6

Summary: In the Linux kernel, the following vulnerability has been resolved: 9p/xen: protect xen_9pfs_front_free against concurrent calls The xenwatch thread can race with other back-end change notifications and call xen_9pfs_front_free() twice, hitting the observed general protection fault due to a double-free. Guard the teardown path so only one caller can release the front-end state at a time, preventing the crash. This is a fix for the following double-free: [ 27.052347] Oops: general protection fault, probably for non-canonical address 0x6b6b6b6b6b6b6b6b: 0000 [#1] SMP DEBUG_PAGEALLOC NOPTI [ 27.052357] CPU: 0 UID: 0 PID: 32 Comm: xenwatch Not tainted 6.18.0-02087-g51ab33fc0a8b-dirty #60 PREEMPT(none) [ 27.052363] RIP: e030:xen_9pfs_front_free+0x1d/0x150 [ 27.052368] Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 41 55 41 54 55 48 89 fd 48 c7 c7 48 d0 92 85 53 e8 cb cb 05 00 48 8b 45 08 48 8b 55 00 3b 28 0f 85 f9 28 35 fe 48 3b 6a 08 0f 85 ef 28 35 fe 48 89 42 [ 27.052377] RSP: e02b:ffffc9004016fdd0 EFLAGS: 00010246 [ 27.052381] RAX: 6b6b6b6b6b6b6b6b RBX: ffff88800d66e400 RCX: 0000000000000000 [ 27.052385] RDX: 6b6b6b6b6b6b6b6b RSI: 0000000000000000 RDI: 0000000000000000 [ 27.052389] RBP: ffff88800a887040 R08: 0000000000000000 R09: 0000000000000000 [ 27.052393] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888009e46b68 [ 27.052397] R13: 0000000000000200 R14: 0000000000000000 R15: ffff88800a887040 [ 27.052404] FS: 0000000000000000(0000) GS:ffff88808ca57000(0000) knlGS:0000000000000000 [ 27.052408] CS: e030 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.052412] CR2: 00007f9714004360 CR3: 0000000004834000 CR4: 0000000000050660 [ 27.052418] Call Trace: [ 27.052420] [ 27.052422] xen_9pfs_front_changed+0x5d5/0x720 [ 27.052426] ? xenbus_otherend_changed+0x72/0x140 [ 27.052430] ? __pfx_xenwatch_thread+0x10/0x10 [ 27.052434] xenwatch_thread+0x94/0x1c0 [ 27.052438] ? __pfx_autoremove_wake_function+0x10/0x10 [ 27.052442] kthread+0xf8/0x240 [ 27.052445] ? __pfx_kthread+0x10/0x10 [ 27.052449] ? __pfx_kthread+0x10/0x10 [ 27.052452] ret_from_fork+0x16b/0x1a0 [ 27.052456] ? __pfx_kthread+0x10/0x10 [ 27.052459] ret_from_fork_asm+0x1a/0x30 [ 27.052463] [ 27.052465] Modules linked in: [ 27.052471] ---[ end trace 0000000000000000 ]---
Remediation: To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

Recommended actionPatch only the product branches with a verified fix

Fix availability varies by product

What, why and how

In the Linux kernel, the following vulnerability has been resolved: 9p/xen: protect xen_9pfs_front_free against concurrent calls The xenwatch thread can race with other back-end change notifications and call xen_9pfs_front_free() twice, hitting the observed general protection fault due to a double-free. Guard the teardown path so only one caller can release the front-end state at a time, preventing the crash. This is a fix for the following double-free: [ 27.052347] Oops: general protection fault, probably for non-canonical address 0x6b6b6b6b6b6b6b6b: 0000 [#1] SMP DEBUG_PAGEALLOC NOPTI [ 27.052357] CPU: 0 UID: 0 PID: 32 Comm: xenwatch Not tainted 6.18.0-02087-g51ab33fc0a8b-dirty #60 PREEMPT(none) [ 27.052363] RIP: e030:xen_9pfs_front_free+0x1d/0x150 [ 27.052368] Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 41 55 41 54 55 48 89 fd 48 c7 c7 48 d0 92 85 53 e8 cb cb 05 00 48 8b 45 08 48 8b 55 00 <48> 3b 28 0f 85 f9 28 35 fe 48 3b 6a 08 0f 85 ef 28 35 fe 48 89 42 [ 27.052377] RSP: e02b:ffffc9004016fdd0 EFLAGS: 00010246 [ 27.052381] RAX: 6b6b6b6b6b6b6b6b RBX: ffff88800d66e400 RCX: 0000000000000000 [ 27.052385] RDX: 6b6b6b6b6b6b6b6b RSI: 0000000000000000 RDI: 0000000000000000 [ 27.052389] RBP: ffff88800a887040 R08: 0000000000000000 R09: 0000000000000000 [ 27.052393] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888009e46b68 [ 27.052397] R13: 0000000000000200 R14: 0000000000000000 R15: ffff88800a887040 [ 27.052404] FS: 0000000000000000(0000) GS:ffff88808ca57000(0000) knlGS:0000000000000000 [ 27.052408] CS: e030 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.052412] CR2: 00007f9714004360 CR3: 0000000004834000 CR4: 0000000000050660 [ 27.052418] Call Trace: [ 27.052420] <TASK> [ 27.052422] xen_9pfs_front_changed+0x5d5/0x720 [ 27.052426] ? xenbus_otherend_changed+0x72/0x140 [ 27.052430] ? __pfx_xenwatch_thread+0x10/0x10 [ 27.052434] xenwatch_thread+0x94/0x1c0 [ 27.052438] ? __pfx_autoremove_wake_function+0x10/0x10 [ 27.052442] kthread+0xf8/0x240 [ 27.052445] ? __pfx_kthread+0x10/0x10 [ 27.052449] ? __pfx_kthread+0x10/0x10 [ 27.052452] ret_from_fork+0x16b/0x1a0 [ 27.052456] ? __pfx_kthread+0x10/0x10 [ 27.052459] ret_from_fork_asm+0x1a/0x30 [ 27.052463] </TASK> [ 27.052465] Modules linked in: [ 27.052471] ---[ end trace 0000000000000000 ]---

What

Why

The product calls free() twice on the same memory address.

How

An attacker operating through an adjacent network may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

What

Why

The product calls free() twice on the same memory address.

How

An attacker operating through an adjacent network may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path: an adjacent network → Double Free → disrupt the affected service
Attack surface: Adjacent
Privileges required: None: unauthenticated exploitation is possible
User interaction: None
Attack complexity: Low: no specialised conditions are recorded
Security boundary: Unchanged: impact remains within the vulnerable component's security authority
Weakness ? CWE means Common Weakness Enumeration: a standard category for the underlying weakness.: CWE-415 ↗
CWE-415: Double Free. The product calls free() twice on the same memory address.
CVSS vector ? CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVAdjacentAttack vector: The attacker must be on an adjacent or logically close network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land: No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.

UnauthenticatedDenial of serviceCWE-415

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-27808Official EUVD mapping

0 linked advisory records.

Official EUVD record ↗

BSI · German · WID-SEC-2026-1405Linux Kernel: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um nicht spezifizierte Angriffe durchzuführen, möglicherweise Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren oder offenzulegen oder einen Denial-of-Service-Zustand zu verursachen.

Official advisory ↗

CERT-FR · French · CERTFR-2026-AVI-1064Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2026-43231 Référence CVE CVE-2026-43232 https://www.cve.org/CVERecord?id=CVE-2026-43232 Référence CVE CVE-2026-43236 https://www.cve.org/CVERecord?id=CVE-2026-43236 Référence CVE CVE-2026-43240 https://www.cve.org/CVERecord?id=CVE-2026-43240 Référence CVE CVE-2026-43241 https://www.cve.org/CVERecord?id=CVE-2026-43241 Référence CVE CVE-2026-43242 https://www.cve.org/CVERecord?id=CVE-2026-43242 Référence CVE CVE-2026-43243 https://www.cve.org/CVERecord?id=CVE-2026-43243 Référence CVE CVE-2026-43244 https://www.cve.org/CVERecord?id=CVE-2026-43244 Référence CVE CVE-2026-43246 https://www.cve.org/CVERecord?id=CVE-2026-43246 Référence CVE CVE-2026-43249 https://www.cve.org/CVERecord?id=CVE-2026-43249 Référence CVE CVE-2026-43250 https://www.cve.org/CVERecord?id=CVE-2026-43250 Référence CVE CVE-2026-43251 https://www.cve.org/CVERecord?id=CVE-2026-43251 Référence CVE CVE-2026-43253 https://www.cve.org/CVERecord?id=CVE-2026-43253 Référence CVE CVE-2026-43255 https://www.cve.org/CVERecord?id=CVE-2026-43255 Référence CVE CVE-2026-43256 https://www.cve.org/CVERecord?id=CVE-2026-43256 Référence CVE CVE-2026-43257 https://www.cve.org/CVERecord?id=CVE-2026-43257 Référence CVE CVE-2026-43261 https://www.cve.org/CVERecord?id=CVE-2026-43261 Référence CVE CVE-2026-43262 https://www.cve.org/CVERecord?id=

Official advisory ↗

CERT-FR · French · CERTFR-2026-AVI-0954Multiples vulnérabilités dans le noyau Linux d'Ubuntu

d?id=CVE-2026-43236 Référence CVE CVE-2026-43238 https://www.cve.org/CVERecord?id=CVE-2026-43238 Référence CVE CVE-2026-43239 https://www.cve.org/CVERecord?id=CVE-2026-43239 Référence CVE CVE-2026-43241 https://www.cve.org/CVERecord?id=CVE-2026-43241 Référence CVE CVE-2026-43242 https://www.cve.org/CVERecord?id=CVE-2026-43242 Référence CVE CVE-2026-43244 https://www.cve.org/CVERecord?id=CVE-2026-43244 Référence CVE CVE-2026-43245 https://www.cve.org/CVERecord?id=CVE-2026-43245 Référence CVE CVE-2026-43246 https://www.cve.org/CVERecord?id=CVE-2026-43246 Référence CVE CVE-2026-43248 https://www.cve.org/CVERecord?id=CVE-2026-43248 Référence CVE CVE-2026-43249 https://www.cve.org/CVERecord?id=CVE-2026-43249 Référence CVE CVE-2026-43250 https://www.cve.org/CVERecord?id=CVE-2026-43250 Référence CVE CVE-2026-43251 https://www.cve.org/CVERecord?id=CVE-2026-43251 Référence CVE CVE-2026-43252 https://www.cve.org/CVERecord?id=CVE-2026-43252 Référence CVE CVE-2026-43253 https://www.cve.org/CVERecord?id=CVE-2026-43253 Référence CVE CVE-2026-43255 https://www.cve.org/CVERecord?id=CVE-2026-43255 Référence CVE CVE-2026-43256 https://www.cve.org/CVERecord?id=CVE-2026-43256 Référence CVE CVE-2026-43257 https://www.cve.org/CVERecord?id=CVE-2026-43257 Référence CVE CVE-2026-43258 https://www.cve.org/CVERecord?id=

Official advisory ↗

CERT-FR · French · CERTFR-2026-AVI-0864Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2026-43158 Référence CVE CVE-2026-43171 https://www.cve.org/CVERecord?id=CVE-2026-43171 Référence CVE CVE-2026-43187 https://www.cve.org/CVERecord?id=CVE-2026-43187 Référence CVE CVE-2026-43198 https://www.cve.org/CVERecord?id=CVE-2026-43198 Référence CVE CVE-2026-43206 https://www.cve.org/CVERecord?id=CVE-2026-43206 Référence CVE CVE-2026-43233 https://www.cve.org/CVERecord?id=CVE-2026-43233 Référence CVE CVE-2026-43234 https://www.cve.org/CVERecord?id=CVE-2026-43234 Référence CVE CVE-2026-43238 https://www.cve.org/CVERecord?id=CVE-2026-43238 Référence CVE CVE-2026-43239 https://www.cve.org/CVERecord?id=CVE-2026-43239 Référence CVE CVE-2026-43249 https://www.cve.org/CVERecord?id=CVE-2026-43249 Référence CVE CVE-2026-43252 https://www.cve.org/CVERecord?id=CVE-2026-43252 Référence CVE CVE-2026-43261 https://www.cve.org/CVERecord?id=CVE-2026-43261 Référence CVE CVE-2026-43284 https://www.cve.org/CVERecord?id=CVE-2026-43284 Référence CVE CVE-2026-43296 https://www.cve.org/CVERecord?id=CVE-2026-43296 Référence CVE CVE-2026-43303 https://www.cve.org/CVERecord?id=CVE-2026-43303 Référence CVE CVE-2026-43325 https://www.cve.org/CVERecord?id=CVE-2026-43325 Référence CVE CVE-2026-43333 https://www.cve.org/CVERecord?id=CVE-2026-43333 Référence CVE CVE-2026-43336 https://www.cve.org/CVERecord?id=

Official advisory ↗

CERT-FR · French · CERTFR-2026-AVI-0861Multiples vulnérabilités dans le noyau Linux d'Ubuntu

d?id=CVE-2026-43233 Référence CVE CVE-2026-43236 https://www.cve.org/CVERecord?id=CVE-2026-43236 Référence CVE CVE-2026-43238 https://www.cve.org/CVERecord?id=CVE-2026-43238 Référence CVE CVE-2026-43239 https://www.cve.org/CVERecord?id=CVE-2026-43239 Référence CVE CVE-2026-43241 https://www.cve.org/CVERecord?id=CVE-2026-43241 Référence CVE CVE-2026-43242 https://www.cve.org/CVERecord?id=CVE-2026-43242 Référence CVE CVE-2026-43244 https://www.cve.org/CVERecord?id=CVE-2026-43244 Référence CVE CVE-2026-43246 https://www.cve.org/CVERecord?id=CVE-2026-43246 Référence CVE CVE-2026-43248 https://www.cve.org/CVERecord?id=CVE-2026-43248 Référence CVE CVE-2026-43249 https://www.cve.org/CVERecord?id=CVE-2026-43249 Référence CVE CVE-2026-43250 https://www.cve.org/CVERecord?id=CVE-2026-43250 Référence CVE CVE-2026-43251 https://www.cve.org/CVERecord?id=CVE-2026-43251 Référence CVE CVE-2026-43253 https://www.cve.org/CVERecord?id=CVE-2026-43253 Référence CVE CVE-2026-43255 https://www.cve.org/CVERecord?id=CVE-2026-43255 Référence CVE CVE-2026-43256 https://www.cve.org/CVERecord?id=CVE-2026-43256 Référence CVE CVE-2026-43257 https://www.cve.org/CVERecord?id=CVE-2026-43257 Référence CVE CVE-2026-43258 https://www.cve.org/CVERecord?id=CVE-2026-43258 Référence CVE CVE-2026-43261 https://www.cve.org/CVERecord?id=

Official advisory ↗

CERT-FR · French · CERTFR-2026-AVI-0833Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2026-43112 Référence CVE CVE-2026-43119 https://www.cve.org/CVERecord?id=CVE-2026-43119 Référence CVE CVE-2026-43158 https://www.cve.org/CVERecord?id=CVE-2026-43158 Référence CVE CVE-2026-43171 https://www.cve.org/CVERecord?id=CVE-2026-43171 Référence CVE CVE-2026-43187 https://www.cve.org/CVERecord?id=CVE-2026-43187 Référence CVE CVE-2026-43198 https://www.cve.org/CVERecord?id=CVE-2026-43198 Référence CVE CVE-2026-43206 https://www.cve.org/CVERecord?id=CVE-2026-43206 Référence CVE CVE-2026-43234 https://www.cve.org/CVERecord?id=CVE-2026-43234 Référence CVE CVE-2026-43239 https://www.cve.org/CVERecord?id=CVE-2026-43239 Référence CVE CVE-2026-43249 https://www.cve.org/CVERecord?id=CVE-2026-43249 Référence CVE CVE-2026-43252 https://www.cve.org/CVERecord?id=CVE-2026-43252 Référence CVE CVE-2026-43261 https://www.cve.org/CVERecord?id=CVE-2026-43261 Référence CVE CVE-2026-43284 https://www.cve.org/CVERecord?id=CVE-2026-43284 Référence CVE CVE-2026-43296 https://www.cve.org/CVERecord?id=CVE-2026-43296 Référence CVE CVE-2026-43325 https://www.cve.org/CVERecord?id=CVE-2026-43325 Référence CVE CVE-2026-43333 https://www.cve.org/CVERecord?id=CVE-2026-43333 Référence CVE CVE-2026-43338 https://www.cve.org/CVERecord?id=CVE-2026-43338 Référence CVE CVE-2026-43339 https://www.cve.org/CVERecord?id=

Official advisory ↗

CERT-FR · French · CERTFR-2026-AVI-0831Multiples vulnérabilités dans le noyau Linux d'Ubuntu

Official advisory ↗

CERT-FR · French · CERTFR-2026-AVI-0807Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2026-43066 Référence CVE CVE-2026-43068 https://www.cve.org/CVERecord?id=CVE-2026-43068 Référence CVE CVE-2026-43074 https://www.cve.org/CVERecord?id=CVE-2026-43074 Référence CVE CVE-2026-43077 https://www.cve.org/CVERecord?id=CVE-2026-43077 Référence CVE CVE-2026-43109 https://www.cve.org/CVERecord?id=CVE-2026-43109 Référence CVE CVE-2026-43150 https://www.cve.org/CVERecord?id=CVE-2026-43150 Référence CVE CVE-2026-43198 https://www.cve.org/CVERecord?id=CVE-2026-43198 Référence CVE CVE-2026-43206 https://www.cve.org/CVERecord?id=CVE-2026-43206 Référence CVE CVE-2026-43234 https://www.cve.org/CVERecord?id=CVE-2026-43234 Référence CVE CVE-2026-43249 https://www.cve.org/CVERecord?id=CVE-2026-43249 Référence CVE CVE-2026-43252 https://www.cve.org/CVERecord?id=CVE-2026-43252 Référence CVE CVE-2026-43261 https://www.cve.org/CVERecord?id=CVE-2026-43261 Référence CVE CVE-2026-43284 https://www.cve.org/CVERecord?id=CVE-2026-43284 Référence CVE CVE-2026-43296 https://www.cve.org/CVERecord?id=CVE-2026-43296 Référence CVE CVE-2026-43325 https://www.cve.org/CVERecord?id=CVE-2026-43325 Référence CVE CVE-2026-43333 https://www.cve.org/CVERecord?id=CVE-2026-43333 Référence CVE CVE-2026-43338 https://www.cve.org/CVERecord?id=CVE-2026-43338 Référence CVE CVE-2026-43341 https://www.cve.org/CVERecord?id=

Official advisory ↗

CERT-FR · French · CERTFR-2026-AVI-0782Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2026-43140 Référence CVE CVE-2026-43150 https://www.cve.org/CVERecord?id=CVE-2026-43150 Référence CVE CVE-2026-43158 https://www.cve.org/CVERecord?id=CVE-2026-43158 Référence CVE CVE-2026-43184 https://www.cve.org/CVERecord?id=CVE-2026-43184 Référence CVE CVE-2026-43187 https://www.cve.org/CVERecord?id=CVE-2026-43187 Référence CVE CVE-2026-43197 https://www.cve.org/CVERecord?id=CVE-2026-43197 Référence CVE CVE-2026-43198 https://www.cve.org/CVERecord?id=CVE-2026-43198 Référence CVE CVE-2026-43206 https://www.cve.org/CVERecord?id=CVE-2026-43206 Référence CVE CVE-2026-43234 https://www.cve.org/CVERecord?id=CVE-2026-43234 Référence CVE CVE-2026-43249 https://www.cve.org/CVERecord?id=CVE-2026-43249 Référence CVE CVE-2026-43252 https://www.cve.org/CVERecord?id=CVE-2026-43252 Référence CVE CVE-2026-43261 https://www.cve.org/CVERecord?id=CVE-2026-43261 Référence CVE CVE-2026-43284 https://www.cve.org/CVERecord?id=CVE-2026-43284 Référence CVE CVE-2026-43296 https://www.cve.org/CVERecord?id=CVE-2026-43296 Référence CVE CVE-2026-43325 https://www.cve.org/CVERecord?id=CVE-2026-43325 Référence CVE CVE-2026-43328 https://www.cve.org/CVERecord?id=CVE-2026-43328 Référence CVE CVE-2026-43332 https://www.cve.org/CVERecord?id=CVE-2026-43332 Référence CVE CVE-2026-43333 https://www.cve.org/CVERecord?id=

Official advisory ↗

JVN iPedia · Japanese · JVNDB-2026-015104LinuxのLinux Kernelにおける二重解放に関する脆弱性

Linuxカーネルにおいて、以下の脆弱性が修正されました。9p/xenにおいて、xen_9pfs_front_free関数の同時呼び出しから保護する対策が施されました。xenwatchスレッドが他のバックエンドの変更通知と競合し、xen_9pfs_front_free()を二度呼び出すことで二重解放が発生し、一般保護例外が起きていました。フロントエンドの状態を解放する呼び出しを一度に一つだけに制御することにより、クラッシュを防止しています。これは二重解放問題の修正です。[ 27.052347] Oops: general protection fault, probably for non-canonical address 0x6b6b6b6b6b6b6b6b: 0000 [#1] SMP DEBUG_PAGEALLOC NOPTI [ 27.052357] CPU: 0 UID: 0 PID: 32 Comm: xenwatch Not tainted 6.18.0-02087-g51ab33fc0a8b-dirty #60 PREEMPT(none) [ 27.052363] RIP: e030:xen_9pfs_front_free+0x1d/0x150 ... (以下スタックトレース省略) この修正により、xen_9pfs_front_freeの二重解放によるクラッシュを防ぎ、フロントエンド状態の解放パスを保護しています。

Official advisory ↗

Patch and workaround

Operational remediation based on structured source evidence.

Status ? Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.: Fix availability varies by product
Affected: cluster-md-kmp-default as component of SUSE Linux Enterprise Server 15 SP6-LTSS
dlm-kmp-default as component of SUSE Linux Enterprise Server 15 SP6-LTSS
gfs2-kmp-default as component of SUSE Linux Enterprise Server 15 SP6-LTSS
kernel-default as component of SUSE Linux Enterprise Server 15 SP6-LTSS
kernel-default-devel as component of SUSE Linux Enterprise Server 15 SP6-LTSS
kernel-devel as component of SUSE Linux Enterprise Server 15 SP6-LTSS
kernel-macros as component of SUSE Linux Enterprise Server 15 SP6-LTSS
kernel-source as component of SUSE Linux Enterprise Server 15 SP6-LTSS
ocfs2-kmp-default as component of SUSE Linux Enterprise Server 15 SP6-LTSS
reiserfs-kmp-default as component of SUSE Linux Enterprise Server 15 SP6-LTSS
cluster-md-kmp-default as component of SUSE Linux Enterprise Server 15 SP6
dlm-kmp-default as component of SUSE Linux Enterprise Server 15 SP6
gfs2-kmp-default as component of SUSE Linux Enterprise Server 15 SP6
kernel-default as component of SUSE Linux Enterprise Server 15 SP6
kernel-default-devel as component of SUSE Linux Enterprise Server 15 SP6
kernel-devel as component of SUSE Linux Enterprise Server 15 SP6
kernel-macros as component of SUSE Linux Enterprise Server 15 SP6
kernel-source as component of SUSE Linux Enterprise Server 15 SP6
ocfs2-kmp-default as component of SUSE Linux Enterprise Server 15 SP6
reiserfs-kmp-default as component of SUSE Linux Enterprise Server 15 SP6
cluster-md-kmp-default as component of SUSE Linux Enterprise Server for SAP Applications 15 SP6
dlm-kmp-default as component of SUSE Linux Enterprise Server for SAP Applications 15 SP6
gfs2-kmp-default as component of SUSE Linux Enterprise Server for SAP Applications 15 SP6
kernel-default as component of SUSE Linux Enterprise Server for SAP Applications 15 SP6
kernel-default-devel as component of SUSE Linux Enterprise Server for SAP Applications 15 SP6
kernel-devel as component of SUSE Linux Enterprise Server for SAP Applications 15 SP6
kernel-macros as component of SUSE Linux Enterprise Server for SAP Applications 15 SP6
kernel-source as component of SUSE Linux Enterprise Server for SAP Applications 15 SP6
ocfs2-kmp-default as component of SUSE Linux Enterprise Server for SAP Applications 15 SP6
reiserfs-kmp-default as component of SUSE Linux Enterprise Server for SAP Applications 15 SP6
and 17 more
Fixed: Linux: < 6.3, 6.12.75 ≤ 6.12.*, 6.18.16 ≤ 6.18.*, 6.19.6 ≤ 6.19.*, 7.0 ≤ *
Action: Use the product-specific evidence above. Patch only products with a verified fixed release, and keep every affected or under-investigation state without a matching fix in the remediation queue.
Workaround: No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.

Evidence and provenance

Published 6 May 2026 · Last source change 5 Aug 2026, 12:26 UTC · CWE-415 · Double Free

CVE recordCVE.org · 5.2

CVSS sourceCNA

EPSS source

The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.

FIRST · tracked since 2026-08-14

European sourceENISA EUVD · EUVD-2026-27808

Product sourceVendor CSAF · SUSE Product Security Team

Remediation sourceVendor CSAF · SUSE Product Security Team

CWE sourceNIST NVD

NVD statusNVD enriched

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

2026-05-06CVE published

2026-08-05Fixed release or patch reference recorded

ENISA EUVD · EUVD-2026-27808↗Vendor CSAF · SUSE Product Security Team↗CVE authority or vendor reference↗Patch or update reference↗Patch or update reference↗Patch or update reference↗Official CVE record (CNA and ADP data)↗NVD record↗

Technical terms and abbreviations used in this report

CVE: Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS: Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS: Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE: Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA: CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP: Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD: National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT: A computer security incident response team that publishes warnings or coordinates incident response.
PoC: Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF: Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL: Living off the land: abuse of legitimate tools or system functions during an attack.

9p/xen: protect xen_9pfs_front_free against concurrent calls

Published severity in operational context

Evidence used

Compensating controls

Verification

Remediation availability differs by product scope

Release-specific package status

Authoritative vendor CSAF and VEX advisories

National CERT insights
?
CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

ENISA European Vulnerability Database

EUVD-2026-27808

What, why and how

Exploit reality and attack path

Official authority intelligence

Patch and workaround

Evidence and provenance

What changed after publication