netfilter: bpf: defer hook memory release until rcu readers are done
In the Linux kernel, the following vulnerability has been resolved: netfilter: bpf: defer hook memory release until rcu readers are done Yiming Qian reports UaF when concurrent process is dumping hooks via nfnetlink_hooks: BUG: KASAN: slab-use-after-free in nfnl_hook_dump_one.isra.0+0xe71/0x10f0 Read of size 8 at addr ffff888003edbf88 by task poc/79 Call Trace: nfnl_hook_dump_one.isra.0+0xe71/0x10f0 netlink_dump+0x554/0x12b0 nfnl_hook_get+0x176/0x230 [..] Defer release until after concurrent readers have completed.
CVE-2026-23412
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-2026-23412
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": "84601d6ee68ae820dec97450934797046d62db4b",
"lessThan": "d016c216bc75c45128160593a77b864a04dbe7c0",
"versionType": "git"
},
{
"status": "affected",
"version": "84601d6ee68ae820dec97450934797046d62db4b",
"lessThan": "cb2bf5efdb02a2a59faf603604a1066e8266f349",
"versionType": "git"
},
{
"status": "affected",
"version": "84601d6ee68ae820dec97450934797046d62db4b",
"lessThan": "c25e0dec366ae99b7264324ce3c7cbaea34691f9",
"versionType": "git"
},
{
"status": "affected",
"version": "84601d6ee68ae820dec97450934797046d62db4b",
"lessThan": "54244d54a971c26a0cd0a9073460ff71f3c51b32",
"versionType": "git"
},
{
"status": "affected",
"version": "84601d6ee68ae820dec97450934797046d62db4b",
"lessThan": "24f90fa3994b992d1a09003a3db2599330a5232a",
"versionType": "git"
}
],
"programFiles": [
"net/netfilter/nf_bpf_link.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.4"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.130",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.78",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.20",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.10",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/netfilter/nf_bpf_link.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-23412
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #39844 · Revision 1
- Added to Heist Feed
- Publisher date