ipv4: do not warn on route notification size race
In the Linux kernel, the following vulnerability has been resolved: ipv4: do not warn on route notification size race Commit 680aea08e78c ("net: ipv4: Emit notification when fib hardware flags are changed") added asynchronous route notifications for hardware flag changes. fib_alias_hw_flags_set() sizes the skb with fib_nlmsg_size() and later fills it with fib_dump_info() while holding only RCU. With nexthop compatibility mode enabled, a concurrent replacement can grow the group between these independent snapshots. fib_dump_info() can then legitimately return -EMSGSIZE, so the warning does not prove a sizing bug. Remove the warning. The existing error path still frees the skb and reports the error to listeners.
CVE-2026-99071
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-2026-99071
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": "680aea08e78c003292415518ad270bc20f9c80b1",
"lessThan": "088ba80eef85fa7a5ad8f9e7c82b403c99242b56",
"versionType": "git"
},
{
"status": "affected",
"version": "680aea08e78c003292415518ad270bc20f9c80b1",
"lessThan": "78a1cf5c54b2f795c81fedb530755a8d01cc84f0",
"versionType": "git"
},
{
"status": "affected",
"version": "680aea08e78c003292415518ad270bc20f9c80b1",
"lessThan": "7dfa7ca97f3ac46353edd4cc44f7733758e4535b",
"versionType": "git"
},
{
"status": "affected",
"version": "680aea08e78c003292415518ad270bc20f9c80b1",
"lessThan": "221ef5e1e44a044790f0f54e6aa237883f475a4d",
"versionType": "git"
},
{
"status": "affected",
"version": "680aea08e78c003292415518ad270bc20f9c80b1",
"lessThan": "e02a5b6588161673ef75a4bc5cdfb62bd493374d",
"versionType": "git"
}
],
"programFiles": [
"net/ipv4/fib_trie.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.113",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.11",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/ipv4/fib_trie.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-99071
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #52895 · Revision 1
- Added to Heist Feed
- Publisher date