xfrm: account XFRMA_IF_ID in aevent size calculation
In the Linux kernel, the following vulnerability has been resolved: xfrm: account XFRMA_IF_ID in aevent size calculation xfrm_get_ae() allocates the reply skb with xfrm_aevent_msgsize(), then build_aevent() appends attributes including XFRMA_IF_ID when x->if_id is set. xfrm_aevent_msgsize() does not include space for XFRMA_IF_ID. For states with if_id, build_aevent() can fail with -EMSGSIZE and hit BUG_ON(err < 0) in xfrm_get_ae(), turning a malformed netlink interaction into a kernel panic. Account XFRMA_IF_ID in the size calculation unconditionally and replace the BUG_ON with normal error unwinding.
CVE-2026-43107
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-2026-43107
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": "7e6526404adedf079279aa7aa11722deaca8fe2e",
"lessThan": "f8f3bb89ab677db15f9f5250c77af728f9afe995",
"versionType": "git"
},
{
"status": "affected",
"version": "7e6526404adedf079279aa7aa11722deaca8fe2e",
"lessThan": "2c41283d94af943a05f7f2cc1a01f0c872f3cf43",
"versionType": "git"
},
{
"status": "affected",
"version": "7e6526404adedf079279aa7aa11722deaca8fe2e",
"lessThan": "e62e322ea20be78e346e4b49f9a6b9f03313af4c",
"versionType": "git"
},
{
"status": "affected",
"version": "7e6526404adedf079279aa7aa11722deaca8fe2e",
"lessThan": "58e5735d1a5373652f405a0c16e54ac04aaab0ad",
"versionType": "git"
},
{
"status": "affected",
"version": "7e6526404adedf079279aa7aa11722deaca8fe2e",
"lessThan": "7081d46d32312f1a31f0e0e99c6835a394037599",
"versionType": "git"
}
],
"programFiles": [
"net/xfrm/xfrm_user.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.19"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.19",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.83",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.24",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.14",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/xfrm/xfrm_user.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-43107
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46259 · Revision 1
- Added to Heist Feed
- Publisher date