CVE-2026-43084
- Source
- https://cve.org/CVERecord?id=CVE-2026-43084
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43084.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-43084
- Downstream
- Published
- 2026-05-06T07:40:19.253Z
- Modified
- 2026-07-11T03:55:38.539337974Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- netfilter: nfnetlink_queue: make hash table per queue
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
netfilter: nfnetlink_queue: make hash table per queue
Sharing a global hash table among all queues is tempting, but it can cause crash:
BUG: KASAN: slab-use-after-free in nfqnlrecvverdict+0x11ac/0x15e0 [nfnetlinkqueue] [..] nfqnlrecvverdict+0x11ac/0x15e0 [nfnetlinkqueue] nfnetlinkrcvmsg+0x46a/0x930 kmemcacheallocnodenoprof+0x11e/0x450
struct nfqueueentry is freed via kfree, but parallel cpu can still encounter such an nfqueueentry when walking the list.
Alternative fix is to free the nfqueueentry via kfree_rcu() instead, but as we have to alloc/free for each skb this will cause more mem pressure.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43084.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/stable/c/22730cb96093b5be0609063bbb1923dbecd61252
- https://git.kernel.org/stable/c/41e3652a178cb0eecd48e0e6e27fbb73a004046a
- https://git.kernel.org/stable/c/936206e3f6ff411581e615e930263d6f8b78df9d
- https://git.kernel.org/stable/c/9e5ebef91120d2764aefe557c3a484b6288f341f
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43084.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-43084
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced371de2bef6582a3f58049b3d18e190924af9c9a0Fixed22730cb96093b5be0609063bbb1923dbecd61252
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced870e3e63da8e88daffe9d692a025c711658018a8Fixed41e3652a178cb0eecd48e0e6e27fbb73a004046a
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced70e2e3ce4f6841e12ec1c104fc76c0e707398ec4Fixed9e5ebef91120d2764aefe557c3a484b6288f341f
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducede19079adcd26a25d7d3e586b1837493361fdf8b6Fixed936206e3f6ff411581e615e930263d6f8b78df9d