Full vulnerability report · 2026

CVE-2026-53013High confidence

macvlan: fix macvlan_get_size() not reserving space for IFLA_MACVLAN_BC_CUTOFF

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 20 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 24 Jun 2026

Evidence used

No CISA KEV confirmation is currently recorded.
Exploitation requires an existing local or physical foothold with privileges.
EPSS is 0.16% 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 20 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Canonical Ubuntu Security: 20 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 20 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.	`6.12.94-1`	Debian Security Tracker ↗Source updated 6 Oct 2026
Debian bookwormbookworm · source	`linux`	Not affectedDebian marks this release not affected (fixed-version marker 0).	`Not published in this feed`	Debian Security Tracker ↗Source updated 6 Oct 2026
Debian forkyforky · source	`linux`	Vendor fix publishedDebian records a fixed source-package version for this release.	`7.0.10-1`	Debian Security Tracker ↗Source updated 6 Oct 2026
Debian sidsid · source	`linux`	Vendor fix publishedDebian records a fixed source-package version for this release.	`7.0.10-1`	Debian Security Tracker ↗Source updated 6 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-2026-53013 · CSAF 2.0 · revision 13 · interimSUSE Product Security TeamCVE-2026-53013

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: macvlan: fix macvlan_get_size() not reserving space for IFLA_MACVLAN_BC_CUTOFF macvlan_get_size() does not account for IFLA_MACVLAN_BC_CUTOFF, but macvlan_fill_info() conditionally includes it when port->bc_cutoff != 1. This causes nla_put_s32() to fail with -EMSGSIZE when the netlink skb runs out of space, triggering a WARN_ON in rtnetlink and preventing the interface from being dumped. The bug can be reproduced with: ip link add macvlan0 link eth0 type macvlan mode bridge ip link set macvlan0 type macvlan bc_cutoff 0 ip -d link show macvlan0 # fails with -EMSGSIZE The bc_cutoff feature was added in commit 954d1fa1ac93 ("macvlan: Add netlink attribute for broadcast cutoff"), which added the nla_put_s32() call in macvlan_fill_info() but missed adding the corresponding nla_total_size(4) in macvlan_get_size(). A follow-up commit 55cef78c244d ("macvlan: add forgotten nla_policy for IFLA_MACVLAN_BC_CUTOFF") fixed the missing nla_policy entry but still did not fix the size calculation.
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: macvlan: fix macvlan_get_size() not reserving space for IFLA_MACVLAN_BC_CUTOFF macvlan_get_size() does not account for IFLA_MACVLAN_BC_CUTOFF, but macvlan_fill_info() conditionally includes it when port->bc_cutoff != 1. This causes nla_put_s32() to fail with -EMSGSIZE when the netlink skb runs out of space, triggering a WARN_ON in rtnetlink and preventing the interface from being dumped. The bug can be reproduced with: ip link add macvlan0 link eth0 type macvlan mode bridge ip link set macvlan0 type macvlan bc_cutoff 0 ip -d link show macvlan0 # fails with -EMSGSIZE The bc_cutoff feature was added in commit 954d1fa1ac93 ("macvlan: Add netlink attribute for broadcast cutoff"), which added the nla_put_s32() call in macvlan_fill_info() but missed adding the corresponding nla_total_size(4) in macvlan_get_size(). A follow-up commit 55cef78c244d ("macvlan: add forgotten nla_policy for IFLA_MACVLAN_BC_CUTOFF") fixed the missing nla_policy entry but still did not fix the size calculation.

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-2026-38881Official EUVD mapping

0 linked advisory records.

Official EUVD record ↗

BSI · German · WID-SEC-2026-2077Linux Kernel: Mehrere Schwachstellen

Ein entfernter Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um Sicherheitsvorkehrungen zu umgehen, einen Denial-of-Service-Zustand herbeizuführen und weitere, nicht näher spezifizierte Auswirkungen zu erzielen.

Official advisory ↗

Cyber Security Agency of Singapore · English · CSA-SB-20260701Security Bulletin 1 July 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 1 July 2026, published on 1 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-2026-53004 Référence CVE CVE-2026-53005 https://www.cve.org/CVERecord?id=CVE-2026-53005 Référence CVE CVE-2026-53006 https://www.cve.org/CVERecord?id=CVE-2026-53006 Référence CVE CVE-2026-53007 https://www.cve.org/CVERecord?id=CVE-2026-53007 Référence CVE CVE-2026-53008 https://www.cve.org/CVERecord?id=CVE-2026-53008 Référence CVE CVE-2026-53009 https://www.cve.org/CVERecord?id=CVE-2026-53009 Référence CVE CVE-2026-53010 https://www.cve.org/CVERecord?id=CVE-2026-53010 Référence CVE CVE-2026-53011 https://www.cve.org/CVERecord?id=CVE-2026-53011 Référence CVE CVE-2026-53012 https://www.cve.org/CVERecord?id=CVE-2026-53012 Référence CVE CVE-2026-53013 https://www.cve.org/CVERecord?id=CVE-2026-53013 Référence CVE CVE-2026-53014 https://www.cve.org/CVERecord?id=CVE-2026-53014 Référence CVE CVE-2026-53015 https://www.cve.org/CVERecord?id=CVE-2026-53015 Référence CVE CVE-2026-53016 https://www.cve.org/CVERecord?id=CVE-2026-53016 Référence CVE CVE-2026-53017 https://www.cve.org/CVERecord?id=CVE-2026-53017 Référence CVE CVE-2026-53018 https://www.cve.org/CVERecord?id=CVE-2026-53018 Référence CVE CVE-2026-53019 https://www.cve.org/CVERecord?id=CVE-2026-53019 Référence CVE CVE-2026-53020 https://www.cve.org/CVERecord?id=CVE-2026-53020 Référence CVE CVE-2026-53021 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-1162Multiples vulnérabilités dans le noyau Linux d'Ubuntu

Official advisory ↗

CERT-FR · French · CERTFR-2026-AVI-1066Multiples vulnérabilités dans le noyau Linux d'Ubuntu

Official advisory ↗

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

d?id=CVE-2026-53000 Référence CVE CVE-2026-53002 https://www.cve.org/CVERecord?id=CVE-2026-53002 Référence CVE CVE-2026-53003 https://www.cve.org/CVERecord?id=CVE-2026-53003 Référence CVE CVE-2026-53004 https://www.cve.org/CVERecord?id=CVE-2026-53004 Référence CVE CVE-2026-53005 https://www.cve.org/CVERecord?id=CVE-2026-53005 Référence CVE CVE-2026-53006 https://www.cve.org/CVERecord?id=CVE-2026-53006 Référence CVE CVE-2026-53009 https://www.cve.org/CVERecord?id=CVE-2026-53009 Référence CVE CVE-2026-53011 https://www.cve.org/CVERecord?id=CVE-2026-53011 Référence CVE CVE-2026-53012 https://www.cve.org/CVERecord?id=CVE-2026-53012 Référence CVE CVE-2026-53013 https://www.cve.org/CVERecord?id=CVE-2026-53013 Référence CVE CVE-2026-53014 https://www.cve.org/CVERecord?id=CVE-2026-53014 Référence CVE CVE-2026-53016 https://www.cve.org/CVERecord?id=CVE-2026-53016 Référence CVE CVE-2026-53022 https://www.cve.org/CVERecord?id=CVE-2026-53022 Référence CVE CVE-2026-53032 https://www.cve.org/CVERecord?id=CVE-2026-53032 Référence CVE CVE-2026-53035 https://www.cve.org/CVERecord?id=CVE-2026-53035 Référence CVE CVE-2026-53037 https://www.cve.org/CVERecord?id=CVE-2026-53037 Référence CVE CVE-2026-53038 https://www.cve.org/CVERecord?id=CVE-2026-53038 Référence CVE CVE-2026-53045 https://www.cve.org/CVERecord?id=

Official advisory ↗

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

Official advisory ↗

CERT-FR · French · CERTFR-2026-AVI-0927Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2026-52980 Référence CVE CVE-2026-52981 https://www.cve.org/CVERecord?id=CVE-2026-52981 Référence CVE CVE-2026-52982 https://www.cve.org/CVERecord?id=CVE-2026-52982 Référence CVE CVE-2026-52989 https://www.cve.org/CVERecord?id=CVE-2026-52989 Référence CVE CVE-2026-52993 https://www.cve.org/CVERecord?id=CVE-2026-52993 Référence CVE CVE-2026-52995 https://www.cve.org/CVERecord?id=CVE-2026-52995 Référence CVE CVE-2026-53003 https://www.cve.org/CVERecord?id=CVE-2026-53003 Référence CVE CVE-2026-53004 https://www.cve.org/CVERecord?id=CVE-2026-53004 Référence CVE CVE-2026-53009 https://www.cve.org/CVERecord?id=CVE-2026-53009 Référence CVE CVE-2026-53013 https://www.cve.org/CVERecord?id=CVE-2026-53013 Référence CVE CVE-2026-53015 https://www.cve.org/CVERecord?id=CVE-2026-53015 Référence CVE CVE-2026-53016 https://www.cve.org/CVERecord?id=CVE-2026-53016 Référence CVE CVE-2026-53021 https://www.cve.org/CVERecord?id=CVE-2026-53021 Référence CVE CVE-2026-53022 https://www.cve.org/CVERecord?id=CVE-2026-53022 Référence CVE CVE-2026-53035 https://www.cve.org/CVERecord?id=CVE-2026-53035 Référence CVE CVE-2026-53036 https://www.cve.org/CVERecord?id=CVE-2026-53036 Référence CVE CVE-2026-53037 https://www.cve.org/CVERecord?id=CVE-2026-53037 Référence CVE CVE-2026-53039 https://www.cve.org/CVERecord?id=

Official advisory ↗

CERT-FR · French · CERTFR-2026-AVI-0926Multiples vulnérabilités dans le noyau Linux d'Ubuntu

Official advisory ↗

CERT-FR · French · CERTFR-2026-AVI-0866Multiples vulnérabilités dans Microsoft Azure Linux

u 27 juin 2026 Bulletin de sécurité Microsoft Azure Linux CVE-2026-52993 du 27 juin 2026 Bulletin de sécurité Microsoft Azure Linux CVE-2026-52998 du 27 juin 2026 Bulletin de sécurité Microsoft Azure Linux CVE-2026-52999 du 27 juin 2026 Bulletin de sécurité Microsoft Azure Linux CVE-2026-53002 du 27 juin 2026 Bulletin de sécurité Microsoft Azure Linux CVE-2026-53003 du 27 juin 2026 Bulletin de sécurité Microsoft Azure Linux CVE-2026-53006 du 27 juin 2026 Bulletin de sécurité Microsoft Azure Linux CVE-2026-53011 du 27 juin 2026 Bulletin de sécurité Microsoft Azure Linux CVE-2026-53012 du 27 juin 2026 Bulletin de sécurité Microsoft Azure Linux CVE-2026-53013 du 27 juin 2026 Bulletin de sécurité Microsoft Azure Linux CVE-2026-53021 du 27 juin 2026 Bulletin de sécurité Microsoft Azure Linux CVE-2026-53022 du 27 juin 2026 Bulletin de sécurité Microsoft Azure Linux CVE-2026-53023 du 27 juin 2026 Bulletin de sécurité Microsoft Azure Linux CVE-2026-53032 du 27 juin 2026 Bulletin de sécurité Microsoft Azure Linux CVE-2026-53034 du 27 juin 2026 Bulletin de sécurité Microsoft Azure Linux CVE-2026-53035 du 27 juin 2026 Bulletin de sécurité Microsoft Azure Linux CVE-2026-53036 du 27 juin 2026 Bulletin de sécurité Microsoft Azure Linux CVE-2026-53037 du 27 juin 2026 Bulletin de sécurité Microsoft Azure Linu

Official advisory ↗

JVN iPedia · Japanese · JVNDB-2026-023740Linux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。macvlan: macvlan_get_size()がIFLA_MACVLAN_BC_CUTOFFのためのスペースを確保しない問題の修正です。macvlan_get_size()はIFLA_MACVLAN_BC_CUTOFFを考慮していませんが、macvlan_fill_info()はport-＞bc_cutoff != 1の場合に条件付きでこれを含んでいます。これにより、netlink skbのスペース不足時にnla_put_s32()が-EMSGSIZEで失敗し、rtnetlinkでWARN_ONがトリガーされ、インターフェースのダンプができなくなっていました。このバグは以下の手順で再現可能です。 ip link add macvlan0 link eth0 type macvlan mode bridge ip link set macvlan0 type macvlan bc_cutoff 0 ip -d link show macvlan0 # ここで-EMSGSIZEで失敗します。bc_cutoff機能はコミット954d1fa1ac93（"macvlan: Add netlink attribute for broadcast cutoff"）で追加され、macvlan_fill_info()にnla_put_s32()の呼び出しが加えられましたが、macvlan_get_size()に対応するnla_total_size(4)の追加が忘れられていました。続くコミット55cef78c244d（"macvlan: add forgotten nla_policy for IFLA_MACVLAN_BC_CUTOFF"）では欠落していたnla_policyエントリの追加が行われましたが、サイズ計算の修正はされていませんでした。

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 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: < 6.4, 6.6.141 ≤ 6.6.*, 6.12.91 ≤ 6.12.*, 6.18.33 ≤ 6.18.*, 7.0.10 ≤ 7.0.*, 7.1 ≤ *
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 24 Jun 2026 · Last source change 24 Jun 2026, 16:29 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-2026-38881

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 ↗

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

2026-06-24CVE published

2026-06-24Fixed release or patch reference recorded

ENISA EUVD · EUVD-2026-38881↗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.

macvlan: fix macvlan_get_size() not reserving space for IFLA_MACVLAN_BC_CUTOFF

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-2026-38881

What, why and how

Exploit reality and attack path

Official authority intelligence

Patch and workaround

Evidence and provenance

What changed after publication