{"id":"CVE-2026-80613","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-80613","generatedAt":"2026-10-28T01:19:11.438Z","title":"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.","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nveth: fix NAPI leak in XDP enable error path\n\nDuring XDP enablement in veth, if xdp_rxq_info_reg() or\nxdp_rxq_info_reg_mem_model() fails, the driver rolls back the changes.\n\nHowever, the rollback loop:\n\tfor (i--; i >= start; i--) {\n\ndecrements the loop index 'i' before the first iteration. This\ncorrectly skips unregistering the rxq for the failed index 'i' (as\nregistration failed or was already cleaned up), but it also\nerroneously skips calling netif_napi_deli() for rq[i].xdp_napi.\n\nSince netif_napi_add() was already called for index 'i', this leaves\na dangling napi_struct in the device's napi_list. When the veth\ndevice is later destroyed, the freed queue memory (which contains the\nleaked NAPI structure) can be reused.\n\nThe subsequent device teardown iterates the NAPI list and\ncorrupts the reallocated memory, leading to UAF.\n\nFix this by explicitly deleting the NAPI association for the failed\nindex 'i' before rolling back the successfully configured queues.","published":"2026-08-28T08:16:45.000Z","lastModified":"2026-10-16T20:18:04.000Z","status":"Received","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":[],"affected":[],"epss":{"score":0.00129,"percentile":0.02533,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/4559770b2a241344d762719e674241fcc8528f02","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4bd2e5dbe62334aae1182d0f0d260f334a49d739","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6739027cb72da26890edd424c77080d187b2a92e","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/83090f5e7b54721d71875a6c224d2490b9e73050","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a9e6707322ef215d39d4655b176c094f45f0ab52","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d3eb258ad398cc9402bab3a5e730cd7c5b34efad","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fc51373345e7e6ea73da2650cb497309c50b077a","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80613","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}