veth: fix NAPI leak in XDP enable error path

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-80613
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-28 08:16:45 UTC
Updated2026-08-29 07:16:46 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: veth: fix NAPI leak in XDP enable error path During XDP enablement in veth, if xdp_rxq_info_reg() or xdp_rxq_info_reg_mem_model() fails, the driver rolls back the changes. However, the rollback loop: for (i--; i >= start; i--) { decrements the loop index 'i' before the first iteration. This correctly skips unregistering the rxq for the failed index 'i' (as registration failed or was already cleaned up), but it also erroneously skips calling netif_napi_deli() for rq[i].xdp_napi. Since netif_napi_add() was already called for index 'i', this leaves a dangling napi_struct in the device's napi_list. When the veth device is later destroyed, the freed queue memory (which contains the leaked NAPI structure) can be reused. The subsequent device teardown iterates the NAPI list and corrupts the reallocated memory, leading to UAF. Fix this by explicitly deleting the NAPI association for the failed index 'i' before rolling back the successfully configured queues.

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: 0.001720000 probability, percentile 0.067600000 (date 2026-08-28)

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected b02e5a0ebb172c8276cea3151942aac681f7a4a6 fc51373345e7e6ea73da2650cb497309c50b077a git Not specified
CNA Linux Linux affected b02e5a0ebb172c8276cea3151942aac681f7a4a6 4559770b2a241344d762719e674241fcc8528f02 git Not specified
CNA Linux Linux affected b02e5a0ebb172c8276cea3151942aac681f7a4a6 83090f5e7b54721d71875a6c224d2490b9e73050 git Not specified
CNA Linux Linux affected b02e5a0ebb172c8276cea3151942aac681f7a4a6 d3eb258ad398cc9402bab3a5e730cd7c5b34efad git Not specified
CNA Linux Linux affected b02e5a0ebb172c8276cea3151942aac681f7a4a6 a9e6707322ef215d39d4655b176c094f45f0ab52 git Not specified
CNA Linux Linux affected b02e5a0ebb172c8276cea3151942aac681f7a4a6 4bd2e5dbe62334aae1182d0f0d260f334a49d739 git Not specified
CNA Linux Linux affected b02e5a0ebb172c8276cea3151942aac681f7a4a6 6739027cb72da26890edd424c77080d187b2a92e git Not specified
CNA Linux Linux affected 5.11 Not specified
CNA Linux Linux unaffected 5.11 semver Not specified
CNA Linux Linux unaffected 5.15.212 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.178 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.145 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.97 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/a9e6707322ef215d39d4655b176c094f45f0ab52 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6739027cb72da26890edd424c77080d187b2a92e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/83090f5e7b54721d71875a6c224d2490b9e73050 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4559770b2a241344d762719e674241fcc8528f02 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/fc51373345e7e6ea73da2650cb497309c50b077a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d3eb258ad398cc9402bab3a5e730cd7c5b34efad 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4bd2e5dbe62334aae1182d0f0d260f334a49d739 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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