batman-adv: fix stale receive device on merged fragments
In the Linux kernel, the following vulnerability has been resolved: batman-adv: fix stale receive device on merged fragments Fragment reassembly reuses the skb from the highest-numbered buffered fragment as the merged packet. When that fragment was received on a hard interface which is deleted before the chain completes, the merged skb can re-enter the receive path with a stale skb->dev and skb_iif. batadv_batman_skb_recv() passes such merged packets through the normal receive handlers again. DAT and bridge loop avoidance both derive the ARP header length from skb->dev, so they can dereference the freed net_device before the packet reaches the local mesh interface. Refresh the receive device metadata from the current receive device before running the packet handlers. This keeps internally reinjected merged fragments consistent with the normal receive path after hard interface teardown.
CVE-2026-89951
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-2026-89951
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": "610bfc6bc99bc83680d190ebc69359a05fc7f605",
"lessThan": "63d86250fa7cbe22451369bd1c0881dfc8190958",
"versionType": "git"
},
{
"status": "affected",
"version": "610bfc6bc99bc83680d190ebc69359a05fc7f605",
"lessThan": "f830c2dfc1431764db9256b3d5db1695fc9a7f56",
"versionType": "git"
},
{
"status": "affected",
"version": "610bfc6bc99bc83680d190ebc69359a05fc7f605",
"lessThan": "f4b4ae763b5d59319fad62a00c76676758e7dafa",
"versionType": "git"
},
{
"status": "affected",
"version": "610bfc6bc99bc83680d190ebc69359a05fc7f605",
"lessThan": "6df64825f8b199921120c685af2abca14b077331",
"versionType": "git"
},
{
"status": "affected",
"version": "610bfc6bc99bc83680d190ebc69359a05fc7f605",
"lessThan": "a2c272da99c2077088083c14961cf2f1e4506995",
"versionType": "git"
},
{
"status": "affected",
"version": "610bfc6bc99bc83680d190ebc69359a05fc7f605",
"lessThan": "e91d2cc7441d89a45bad73ad9789159c7441cb80",
"versionType": "git"
},
{
"status": "affected",
"version": "610bfc6bc99bc83680d190ebc69359a05fc7f605",
"lessThan": "2dffc8c44b6e3347b3719c6419c07b4a18fea895",
"versionType": "git"
},
{
"status": "affected",
"version": "610bfc6bc99bc83680d190ebc69359a05fc7f605",
"lessThan": "ad46c907d7d9975a285c1e89a4adde652eaa93f5",
"versionType": "git"
}
],
"programFiles": [
"net/batman-adv/main.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.13"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.13",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.51",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.5",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/batman-adv/main.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89951
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #36392 · Revision 1
- Added to Heist Feed
- Publisher date