Full vulnerability report · 2026

CVE-2026-64345High confidence

usb: gadget: f_printer: take kref only for successful open

Linux · Linux

5.5MediumCVSS 3.1

Recommended action

Patch only the product branches with a verified fix

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority. 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 severityMediumOperational priority:Low, lowered one band.downgradedsince 17 Aug 2026

Evidence used

No CISA KEV confirmation is currently recorded.
Exploitation requires an existing local or physical foothold with privileges.
EPSS is 0.12% 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.

25 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.	`6.12.96-1`	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 bookwormbookworm · source	`linux-6.12`	Vendor fix publishedDebian records a fixed source-package version for this release.	`6.12.100-1~deb12u1`	Debian Security Tracker ↗Source updated 5 Oct 2026
Debian forkyforky · source	`linux`	Vendor fix publishedDebian records a fixed source-package version for this release.	`7.1.4-1`	Debian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · source	`linux`	Vendor fix publishedDebian records a fixed source-package version for this release.	`7.1.4-1`	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-2026-64345 · CSAF 2.0 · revision 11 · interimSUSE Product Security TeamCVE-2026-64345

292 known affected

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

cluster-md-kmp-default as component of SUSE Linux Enterprise High Performance Computing 12 SP5
dlm-kmp-default as component of SUSE Linux Enterprise High Performance Computing 12 SP5
gfs2-kmp-default as component of SUSE Linux Enterprise High Performance Computing 12 SP5
kernel-default as component of SUSE Linux Enterprise High Performance Computing 12 SP5
kernel-default-base as component of SUSE Linux Enterprise High Performance Computing 12 SP5
kernel-default-devel as component of SUSE Linux Enterprise High Performance Computing 12 SP5
kernel-default-man as component of SUSE Linux Enterprise High Performance Computing 12 SP5
kernel-devel as component of SUSE Linux Enterprise High Performance Computing 12 SP5
kernel-macros as component of SUSE Linux Enterprise High Performance Computing 12 SP5
kernel-source as component of SUSE Linux Enterprise High Performance Computing 12 SP5
ocfs2-kmp-default as component of SUSE Linux Enterprise High Performance Computing 12 SP5
kernel-default as component of SUSE Linux Enterprise High Performance Computing 15 SP1

Summary: In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_printer: take kref only for successful open printer_open() returns -EBUSY when the character device is already open, but it increments dev->kref regardless of the return value. VFS does not call ->release() for a failed open, so every rejected second open permanently leaks one reference. Move kref_get() into the successful-open branch.
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: usb: gadget: f_printer: take kref only for successful open printer_open() returns -EBUSY when the character device is already open, but it increments dev->kref regardless of the return value. VFS does not call ->release() for a failed open, so every rejected second open permanently leaks one reference. Move kref_get() into the successful-open branch.

What

Why

The current structured CVE record identifies a security weakness, but the root cause requires confirmation in the linked vendor material.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

Why

The current structured CVE record identifies a security weakness, but the root cause requires confirmation in the linked vendor material.

How

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: local access → vulnerable operation → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface: Local
Privileges required: Low: a basic authenticated account is required
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.: CWE not yet assigned
CVSS vector ? CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land: The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.

Official authority intelligence

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

ENISA EUVD · EUVD-2026-48889Official EUVD mapping

0 linked advisory records.

Official EUVD record ↗

BSI · German · WID-SEC-2026-2527Linux Kernel: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um nicht näher spezifizierte Angriffe durchzuführen, dazu können DoS-Angriffe, die Offenlegung von Informationen, die Beschädigung des Speichers oder die Umgehung von Sicherheitsmaßnahmen gehören.

Official advisory ↗

Cyber Security Agency of Singapore · English · CSA-SB-20260729Security Bulletin 29 Jul 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 29 Jul 2026, published on 29 July 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗

CERT-FR · French · CERTFR-2026-AVI-1252Multiples vulnérabilités dans le noyau Linux d'Ubuntu

d?id=CVE-2026-64336 Référence CVE CVE-2026-64337 https://www.cve.org/CVERecord?id=CVE-2026-64337 Référence CVE CVE-2026-64338 https://www.cve.org/CVERecord?id=CVE-2026-64338 Référence CVE CVE-2026-64339 https://www.cve.org/CVERecord?id=CVE-2026-64339 Référence CVE CVE-2026-64340 https://www.cve.org/CVERecord?id=CVE-2026-64340 Référence CVE CVE-2026-64341 https://www.cve.org/CVERecord?id=CVE-2026-64341 Référence CVE CVE-2026-64342 https://www.cve.org/CVERecord?id=CVE-2026-64342 Référence CVE CVE-2026-64343 https://www.cve.org/CVERecord?id=CVE-2026-64343 Référence CVE CVE-2026-64344 https://www.cve.org/CVERecord?id=CVE-2026-64344 Référence CVE CVE-2026-64345 https://www.cve.org/CVERecord?id=CVE-2026-64345 Référence CVE CVE-2026-64346 https://www.cve.org/CVERecord?id=CVE-2026-64346 Référence CVE CVE-2026-64347 https://www.cve.org/CVERecord?id=CVE-2026-64347 Référence CVE CVE-2026-64348 https://www.cve.org/CVERecord?id=CVE-2026-64348 Référence CVE CVE-2026-64350 https://www.cve.org/CVERecord?id=CVE-2026-64350 Référence CVE CVE-2026-64351 https://www.cve.org/CVERecord?id=CVE-2026-64351 Référence CVE CVE-2026-64352 https://www.cve.org/CVERecord?id=CVE-2026-64352 Référence CVE CVE-2026-64353 https://www.cve.org/CVERecord?id=CVE-2026-64353 Référence CVE CVE-2026-64354 https://www.cve.org/CVERecord?id=

Official advisory ↗

CERT-FR · French · CERTFR-2026-AVI-1229Multiples vulnérabilités dans le noyau Linux d'Ubuntu

Official advisory ↗

CERT-FR · French · CERTFR-2026-AVI-1203Multiples vulnérabilités dans le noyau Linux d'Ubuntu

Official advisory ↗

CERT-FR · French · CERTFR-2026-AVI-1162Multiples vulnérabilités dans le noyau Linux d'Ubuntu

Official advisory ↗

CERT-FR · French · CERTFR-2026-AVI-1091Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2026-64220 Référence CVE CVE-2026-64221 https://www.cve.org/CVERecord?id=CVE-2026-64221 Référence CVE CVE-2026-64223 https://www.cve.org/CVERecord?id=CVE-2026-64223 Référence CVE CVE-2026-64231 https://www.cve.org/CVERecord?id=CVE-2026-64231 Référence CVE CVE-2026-64234 https://www.cve.org/CVERecord?id=CVE-2026-64234 Référence CVE CVE-2026-64242 https://www.cve.org/CVERecord?id=CVE-2026-64242 Référence CVE CVE-2026-64298 https://www.cve.org/CVERecord?id=CVE-2026-64298 Référence CVE CVE-2026-64330 https://www.cve.org/CVERecord?id=CVE-2026-64330 Référence CVE CVE-2026-64336 https://www.cve.org/CVERecord?id=CVE-2026-64336 Référence CVE CVE-2026-64345 https://www.cve.org/CVERecord?id=CVE-2026-64345 Référence CVE CVE-2026-64347 https://www.cve.org/CVERecord?id=CVE-2026-64347 Référence CVE CVE-2026-64465 https://www.cve.org/CVERecord?id=CVE-2026-64465 Référence CVE CVE-2026-64530 https://www.cve.org/CVERecord?id=CVE-2026-64530 Référence CVE CVE-2026-64560 https://www.cve.org/CVERecord?id=CVE-2026-64560 Référence CVE CVE-2026-64561 https://www.cve.org/CVERecord?id=CVE-2026-64561 Référence CVE CVE-2026-64564 https://www.cve.org/CVERecord?id=CVE-2026-64564 Référence CVE CVE-2026-64600 https://www.cve.org/CVERecord?id=CVE-2026-64600 Gestion détaillée du document le 28 août 2026 Version initiale

Official advisory ↗

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

d?id=CVE-2026-64221 Référence CVE CVE-2026-64223 https://www.cve.org/CVERecord?id=CVE-2026-64223 Référence CVE CVE-2026-64231 https://www.cve.org/CVERecord?id=CVE-2026-64231 Référence CVE CVE-2026-64233 https://www.cve.org/CVERecord?id=CVE-2026-64233 Référence CVE CVE-2026-64234 https://www.cve.org/CVERecord?id=CVE-2026-64234 Référence CVE CVE-2026-64241 https://www.cve.org/CVERecord?id=CVE-2026-64241 Référence CVE CVE-2026-64242 https://www.cve.org/CVERecord?id=CVE-2026-64242 Référence CVE CVE-2026-64330 https://www.cve.org/CVERecord?id=CVE-2026-64330 Référence CVE CVE-2026-64336 https://www.cve.org/CVERecord?id=CVE-2026-64336 Référence CVE CVE-2026-64345 https://www.cve.org/CVERecord?id=CVE-2026-64345 Référence CVE CVE-2026-64347 https://www.cve.org/CVERecord?id=CVE-2026-64347 Référence CVE CVE-2026-64357 https://www.cve.org/CVERecord?id=CVE-2026-64357 Référence CVE CVE-2026-64465 https://www.cve.org/CVERecord?id=CVE-2026-64465 Référence CVE CVE-2026-64528 https://www.cve.org/CVERecord?id=CVE-2026-64528 Référence CVE CVE-2026-64530 https://www.cve.org/CVERecord?id=CVE-2026-64530 Référence CVE CVE-2026-64560 https://www.cve.org/CVERecord?id=CVE-2026-64560 Référence CVE CVE-2026-64561 https://www.cve.org/CVERecord?id=CVE-2026-64561 Référence CVE CVE-2026-64564 https://www.cve.org/CVERecord?id=

Official advisory ↗

CERT-FR · French · CERTFR-2026-AVI-1031Multiples vulnérabilités dans le noyau Linux de Debian LTS

d?id=CVE-2026-64335 Référence CVE CVE-2026-64336 https://www.cve.org/CVERecord?id=CVE-2026-64336 Référence CVE CVE-2026-64337 https://www.cve.org/CVERecord?id=CVE-2026-64337 Référence CVE CVE-2026-64338 https://www.cve.org/CVERecord?id=CVE-2026-64338 Référence CVE CVE-2026-64340 https://www.cve.org/CVERecord?id=CVE-2026-64340 Référence CVE CVE-2026-64341 https://www.cve.org/CVERecord?id=CVE-2026-64341 Référence CVE CVE-2026-64342 https://www.cve.org/CVERecord?id=CVE-2026-64342 Référence CVE CVE-2026-64343 https://www.cve.org/CVERecord?id=CVE-2026-64343 Référence CVE CVE-2026-64344 https://www.cve.org/CVERecord?id=CVE-2026-64344 Référence CVE CVE-2026-64345 https://www.cve.org/CVERecord?id=CVE-2026-64345 Référence CVE CVE-2026-64346 https://www.cve.org/CVERecord?id=CVE-2026-64346 Référence CVE CVE-2026-64347 https://www.cve.org/CVERecord?id=CVE-2026-64347 Référence CVE CVE-2026-64348 https://www.cve.org/CVERecord?id=CVE-2026-64348 Référence CVE CVE-2026-64350 https://www.cve.org/CVERecord?id=CVE-2026-64350 Référence CVE CVE-2026-64351 https://www.cve.org/CVERecord?id=CVE-2026-64351 Référence CVE CVE-2026-64352 https://www.cve.org/CVERecord?id=CVE-2026-64352 Référence CVE CVE-2026-64354 https://www.cve.org/CVERecord?id=CVE-2026-64354 Référence CVE CVE-2026-64355 https://www.cve.org/CVERecord?id=

Official advisory ↗

CERT-FR · French · CERTFR-2026-AVI-0982Multiples vulnérabilités dans le noyau Linux de Debian LTS

d?id=CVE-2026-64334 Référence CVE CVE-2026-64335 https://www.cve.org/CVERecord?id=CVE-2026-64335 Référence CVE CVE-2026-64336 https://www.cve.org/CVERecord?id=CVE-2026-64336 Référence CVE CVE-2026-64337 https://www.cve.org/CVERecord?id=CVE-2026-64337 Référence CVE CVE-2026-64338 https://www.cve.org/CVERecord?id=CVE-2026-64338 Référence CVE CVE-2026-64340 https://www.cve.org/CVERecord?id=CVE-2026-64340 Référence CVE CVE-2026-64342 https://www.cve.org/CVERecord?id=CVE-2026-64342 Référence CVE CVE-2026-64343 https://www.cve.org/CVERecord?id=CVE-2026-64343 Référence CVE CVE-2026-64344 https://www.cve.org/CVERecord?id=CVE-2026-64344 Référence CVE CVE-2026-64345 https://www.cve.org/CVERecord?id=CVE-2026-64345 Référence CVE CVE-2026-64346 https://www.cve.org/CVERecord?id=CVE-2026-64346 Référence CVE CVE-2026-64347 https://www.cve.org/CVERecord?id=CVE-2026-64347 Référence CVE CVE-2026-64348 https://www.cve.org/CVERecord?id=CVE-2026-64348 Référence CVE CVE-2026-64350 https://www.cve.org/CVERecord?id=CVE-2026-64350 Référence CVE CVE-2026-64351 https://www.cve.org/CVERecord?id=CVE-2026-64351 Référence CVE CVE-2026-64352 https://www.cve.org/CVERecord?id=CVE-2026-64352 Référence CVE CVE-2026-64355 https://www.cve.org/CVERecord?id=CVE-2026-64355 Référence CVE CVE-2026-64359 https://www.cve.org/CVERecord?id=

Official advisory ↗

JVN iPedia · Japanese · JVNDB-2026-032032LinuxのLinux Kernelにおける不特定の脆弱性

Linuxカーネルにおいて、以下の脆弱性が修正されました。usb: gadget: f_printer: 成功したオープン時のみkrefを取得するprinter_open()は、キャラクタデバイスがすでにオープンされている場合に-EBUSYを返しますが、戻り値に関係なくdev-＞krefをインクリメントしていました。VFSは失敗したオープンに対して-＞release()を呼び出さないため、拒否された2回目以降のオープンごとに1つの参照カウントが永久にリークしていました。kref_get()を成功したオープンの分岐内に移動させました。

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 High Performance Computing 12 SP5
dlm-kmp-default as component of SUSE Linux Enterprise High Performance Computing 12 SP5
gfs2-kmp-default as component of SUSE Linux Enterprise High Performance Computing 12 SP5
kernel-default as component of SUSE Linux Enterprise High Performance Computing 12 SP5
kernel-default-base as component of SUSE Linux Enterprise High Performance Computing 12 SP5
kernel-default-devel as component of SUSE Linux Enterprise High Performance Computing 12 SP5
kernel-default-man as component of SUSE Linux Enterprise High Performance Computing 12 SP5
kernel-devel as component of SUSE Linux Enterprise High Performance Computing 12 SP5
kernel-macros as component of SUSE Linux Enterprise High Performance Computing 12 SP5
kernel-source as component of SUSE Linux Enterprise High Performance Computing 12 SP5
ocfs2-kmp-default as component of SUSE Linux Enterprise High Performance Computing 12 SP5
kernel-default as component of SUSE Linux Enterprise High Performance Computing 15 SP1
kernel-default-base as component of SUSE Linux Enterprise High Performance Computing 15 SP1
kernel-default-devel as component of SUSE Linux Enterprise High Performance Computing 15 SP1
kernel-default-man as component of SUSE Linux Enterprise High Performance Computing 15 SP1
kernel-devel as component of SUSE Linux Enterprise High Performance Computing 15 SP1
kernel-macros as component of SUSE Linux Enterprise High Performance Computing 15 SP1
kernel-source as component of SUSE Linux Enterprise High Performance Computing 15 SP1
reiserfs-kmp-default as component of SUSE Linux Enterprise High Performance Computing 15 SP1
kernel-default as component of SUSE Linux Enterprise High Performance Computing 15 SP2
kernel-default-devel as component of SUSE Linux Enterprise High Performance Computing 15 SP2
kernel-devel as component of SUSE Linux Enterprise High Performance Computing 15 SP2
kernel-macros as component of SUSE Linux Enterprise High Performance Computing 15 SP2
kernel-source as component of SUSE Linux Enterprise High Performance Computing 15 SP2
reiserfs-kmp-default as component of SUSE Linux Enterprise High Performance Computing 15 SP2
kernel-default as component of SUSE Linux Enterprise High Performance Computing 15 SP3
kernel-default-devel as component of SUSE Linux Enterprise High Performance Computing 15 SP3
kernel-devel as component of SUSE Linux Enterprise High Performance Computing 15 SP3
kernel-macros as component of SUSE Linux Enterprise High Performance Computing 15 SP3
kernel-source as component of SUSE Linux Enterprise High Performance Computing 15 SP3
and 262 more
Fixed: Linux: < 5.10, 5.10.261 ≤ 5.10.*, 6.6.145 ≤ 6.6.*, 6.12.96 ≤ 6.12.*, 6.18.39 ≤ 6.18.*, 7.1.4 ≤ 7.1.*, 7.2 ≤ *
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 25 Jul 2026 · Last source change 17 Aug 2026, 04:53 UTC · CWE not yet assigned

CVE recordCVE.org · 5.2

CVSS sourceNIST NVD

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-2026-48889

Product sourceVendor CSAF · SUSE Product Security Team

Remediation sourceVendor CSAF · SUSE Product Security Team

CWE sourceUnavailable

NVD statusNVD enriched

Missing structured fields: CWE classification. Missing data is not evidence of low risk; review the primary advisory.

Material change intelligence

What changed after publication

View recent updates ↗

17 Aug 2026, 04:53 UTC
Vendor guidanceAuthoritative vendor guidance changed: added patch: git.kernel.org/30adce93d5c4a5a1ec29d9249e3fdfcc391d406b; added patch: git.kernel.org/75c0ad13e136961328253742501b4efc3988a587; 4 further additions.
Before
remediation: git.kernel.org/94ec20d97aa51547965a539f660a1fe79c6929a3
After
patch: git.kernel.org/30adce93d5c4a5a1ec29d9249e3fdfcc391d406b · patch: git.kernel.org/75c0ad13e136961328253742501b4efc3988a587 · patch: git.kernel.org/7f1f24c367938c5537e2308bf9a965f051d14774 · 4 more references
git.kernel.org ↗
17 Aug 2026, 04:53 UTC
SeveritySeverity changed from Unknown to Medium.
Before
Unknown
After
Medium
NIST NVD ↗
17 Aug 2026, 04:53 UTC
CVSS scoreCVSS score changed from not recorded to 5.5 (CVSS 3.1 · NIST NVD · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
Before
not recorded
After
5.5 (CVSS 3.1 · NIST NVD · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
NIST NVD ↗
17 Aug 2026, 04:53 UTC
Affected versionsThe structured affected or fixed version information changed.
Before
e8d5f92b8d30bb4ade76494490c3c065e12411b1 < 94ec20d97aa51547965a539f660a1fe79c6929a3; e8d5f92b8d30bb4ade76494490c3c065e12411b1 < 75c0ad13e136961328253742501b4efc3988a587; e8d5f92b8d30bb4ade76494490c3c065e12411b1 < bf20c94fa6aaff945f0ae3a23f3212cd299f28d9; e8d5f92b8d30bb4ade76494490c3c065e12411b1 < 8a5eba992c862b0c94411eecf9b7121e8636db38; e8d5f92b8d30bb4ade76494490c3c065e12411b1 < 7f1f24c367938c5537e2308bf9a965f051d14774; e8d5f92b8d30bb4ade76494490c3c065e12411b1 < 30adce93d5c4a5a1ec29d9249e3fdfcc391d406b; 25c95c6bd4dc50a3c20de0fa7f450ea02b2320fc; 4a47581cf010dc351d8069978080fdb000c0776d · Fixed: < 5.10; 5.10.261 ≤ 5.10.*; 6.6.145 ≤ 6.6.*; 6.12.96 ≤ 6.12.*; 6.18.39 ≤ 6.18.*; 7.1.4 ≤ 7.1.*; 7.2-rc3 ≤ *
After
e8d5f92b8d30bb4ade76494490c3c065e12411b1 < 94ec20d97aa51547965a539f660a1fe79c6929a3; e8d5f92b8d30bb4ade76494490c3c065e12411b1 < 75c0ad13e136961328253742501b4efc3988a587; e8d5f92b8d30bb4ade76494490c3c065e12411b1 < bf20c94fa6aaff945f0ae3a23f3212cd299f28d9; e8d5f92b8d30bb4ade76494490c3c065e12411b1 < 8a5eba992c862b0c94411eecf9b7121e8636db38; e8d5f92b8d30bb4ade76494490c3c065e12411b1 < 7f1f24c367938c5537e2308bf9a965f051d14774; e8d5f92b8d30bb4ade76494490c3c065e12411b1 < 30adce93d5c4a5a1ec29d9249e3fdfcc391d406b; 25c95c6bd4dc50a3c20de0fa7f450ea02b2320fc; 4a47581cf010dc351d8069978080fdb000c0776d · Fixed: < 5.10; 5.10.261 ≤ 5.10.*; 6.6.145 ≤ 6.6.*; 6.12.96 ≤ 6.12.*; 6.18.39 ≤ 6.18.*; 7.1.4 ≤ 7.1.*; 7.2 ≤ *
CNA ↗

2026-07-25CVE published

2026-08-17Fixed release or patch reference recorded

ENISA EUVD · EUVD-2026-48889↗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.

usb: gadget: f_printer: take kref only for successful open

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-2026-48889

What, why and how

Exploit reality and attack path

Official authority intelligence

Patch and workaround

Evidence and provenance

What changed after publication