veth: fix NAPI leak in XDP enable error path
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 4 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
In 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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5, 7.2
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix yet |
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
Not affected: 1 product
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2026-80613
- 2026-10-03 Alias added: GHSA-6pj2-mj5g-xmxv
- 2026-10-18 CISA SSVC decision points changed
- 2026-10-30 CVSS score changed · Red Hat
References
Other 7
- https://git.kernel.org/stable/c/fc51373345e7e6ea73da2650cb497309c50b077a
- https://git.kernel.org/stable/c/4559770b2a241344d762719e674241fcc8528f02
- https://git.kernel.org/stable/c/83090f5e7b54721d71875a6c224d2490b9e73050
- https://git.kernel.org/stable/c/d3eb258ad398cc9402bab3a5e730cd7c5b34efad
- https://git.kernel.org/stable/c/a9e6707322ef215d39d4655b176c094f45f0ab52
- https://git.kernel.org/stable/c/4bd2e5dbe62334aae1182d0f0d260f334a49d739
- https://git.kernel.org/stable/c/6739027cb72da26890edd424c77080d187b2a92e
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Sources
- CVE-2026-80613 · CVE Program
- CVE-2026-80613 · NVD
- FIRST EPSS
- GHSA-6pj2-mj5g-xmxv · GitHub Advisory Database · CC BY 4.0
- CVE-2026-80613 · Red Hat security data · CC BY 4.0
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