veth: fix NAPI leak in XDP enable error path
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.
CVE-2026-80613
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-80613
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "b02e5a0ebb172c8276cea3151942aac681f7a4a6",
"lessThan": "fc51373345e7e6ea73da2650cb497309c50b077a",
"versionType": "git"
},
{
"status": "affected",
"version": "b02e5a0ebb172c8276cea3151942aac681f7a4a6",
"lessThan": "4559770b2a241344d762719e674241fcc8528f02",
"versionType": "git"
},
{
"status": "affected",
"version": "b02e5a0ebb172c8276cea3151942aac681f7a4a6",
"lessThan": "83090f5e7b54721d71875a6c224d2490b9e73050",
"versionType": "git"
},
{
"status": "affected",
"version": "b02e5a0ebb172c8276cea3151942aac681f7a4a6",
"lessThan": "d3eb258ad398cc9402bab3a5e730cd7c5b34efad",
"versionType": "git"
},
{
"status": "affected",
"version": "b02e5a0ebb172c8276cea3151942aac681f7a4a6",
"lessThan": "a9e6707322ef215d39d4655b176c094f45f0ab52",
"versionType": "git"
},
{
"status": "affected",
"version": "b02e5a0ebb172c8276cea3151942aac681f7a4a6",
"lessThan": "4bd2e5dbe62334aae1182d0f0d260f334a49d739",
"versionType": "git"
},
{
"status": "affected",
"version": "b02e5a0ebb172c8276cea3151942aac681f7a4a6",
"lessThan": "6739027cb72da26890edd424c77080d187b2a92e",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/veth.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.11"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.11",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/veth.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80613
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #34346 · Revision 1
- Added to Heist Feed
- Publisher date