netfilter: nf_queue: hold bridge skb->dev while queued

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-52912
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-24 08:16:20 UTC
Updated2026-07-08 15:13:08 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: netfilter: nf_queue: hold bridge skb->dev while queued br_pass_frame_up() rewrites skb->dev from the ingress port to the bridge master before queueing bridge LOCAL_IN packets. NFQUEUE only holds references on state.in/out and bridge physdevs, so a queued bridge packet can retain a freed bridge master in skb->dev until reinjection. When the verdict is reinjected later, br_netif_receive_skb() re-enters the receive path with skb->dev still pointing at the freed bridge master, triggering a use-after-free. Store skb->dev in the queue entry, hold a reference on it for the queue lifetime, and use the saved device when dropping queued packets during NETDEV_DOWN handling.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001420000 probability, percentile 0.038870000 (date 2026-07-09)

Problem Types: CWE-416

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected ac28634456867b23b95faccba7997a62ec430603 950d809f154dca04e5fbe5d3c8b9c5e44769cd57 git Not specified
CNA Linux Linux affected ac28634456867b23b95faccba7997a62ec430603 a698ac8ab2561cf575d2d9f34095032651dd952e git Not specified
CNA Linux Linux affected ac28634456867b23b95faccba7997a62ec430603 19924bdd8a45ebc72a7b84c57fd63057d1dc75ac git Not specified
CNA Linux Linux affected ac28634456867b23b95faccba7997a62ec430603 1e5e20031c5eee8d2e490a90ff4d6a2feecfc3be git Not specified
CNA Linux Linux affected ac28634456867b23b95faccba7997a62ec430603 3823c27099cfe2482299065814adbaa771be9644 git Not specified
CNA Linux Linux affected ac28634456867b23b95faccba7997a62ec430603 15d464265120ab9818bd673af301deee09bedab2 git Not specified
CNA Linux Linux affected ac28634456867b23b95faccba7997a62ec430603 3fb0f5c0f64162a8c3f25616a4f1e340b921737f git Not specified
CNA Linux Linux affected ac28634456867b23b95faccba7997a62ec430603 e196115ec330a18de415bdb9f5071aa9f08e53ce git Not specified
CNA Linux Linux affected 4.7 Not specified
CNA Linux Linux unaffected 4.7 semver Not specified
CNA Linux Linux unaffected 5.10.259 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.209 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.175 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.142 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.92 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.34 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.11 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/3fb0f5c0f64162a8c3f25616a4f1e340b921737f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a698ac8ab2561cf575d2d9f34095032651dd952e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/950d809f154dca04e5fbe5d3c8b9c5e44769cd57 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/1e5e20031c5eee8d2e490a90ff4d6a2feecfc3be 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/e196115ec330a18de415bdb9f5071aa9f08e53ce 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/3823c27099cfe2482299065814adbaa771be9644 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/15d464265120ab9818bd673af301deee09bedab2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/19924bdd8a45ebc72a7b84c57fd63057d1dc75ac 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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