CVE-2026-93288netfilter: nfnetlink_log: wait for rcu grace period before freeing pernet state
- 7.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_log: wait for rcu grace period before freeing pernet state sashiko reports: "nfnl_log_net_exit() calls nf_log_unset(), which clears the logger pointer without an RCU grace period. Immediately after, ops_free_list() frees the per-net state while concurrent packets might still be executing nf_log_packet() under rcu_read_lock()." Clear the pointer via .pre_exit to make sure rcu readers have completed before pernet storage is free'd. The change in nf_log_syslog.c is only done for consistency: it doesn't use pernet data.
Timeline
ID reserved
By Linux
- 7 days later
· 7 days later
Published
- 9 days later
· 9 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected c83fa19603bdaeef17b815713dbbe3230c8a34ee – < ba2e246aa294f9acd86194ea87fb6834ed0a37ac
- affected c83fa19603bdaeef17b815713dbbe3230c8a34ee – < 5570d6c8b320dbcc602617ee08c27ce752fed65a
- affected c83fa19603bdaeef17b815713dbbe3230c8a34ee – < 3b9aa62d78ce80de47af2db472ff452398755213
- affected c83fa19603bdaeef17b815713dbbe3230c8a34ee – < f4461654374576e9d5d0245fd534c46ad8509051
- affected c83fa19603bdaeef17b815713dbbe3230c8a34ee – < dc20050b6b12ca58066715d088e1a537535d938d
- affected c83fa19603bdaeef17b815713dbbe3230c8a34ee – < 33d1469b0124cc0baaea7a2032123b77a81e0940
- affected 4.12
- unaffected < 4.12
- unaffected 5.15.222 – ≤ 5.15.*
- unaffected 6.1.189 – ≤ 6.1.*
- unaffected 6.6.158 – ≤ 6.6.*
- unaffected 6.12.111 – ≤ 6.12.*
- unaffected 6.18.53 – ≤ 6.18.*
- unaffected 7.2 – ≤ *
References
References6
- https://git.kernel.org/stable/c/ba2e246aa294f9acd86194ea87fb6834ed0a37ac (opens in a new tab)
- https://git.kernel.org/stable/c/5570d6c8b320dbcc602617ee08c27ce752fed65a (opens in a new tab)
- https://git.kernel.org/stable/c/3b9aa62d78ce80de47af2db472ff452398755213 (opens in a new tab)
- https://git.kernel.org/stable/c/f4461654374576e9d5d0245fd534c46ad8509051 (opens in a new tab)
- https://git.kernel.org/stable/c/dc20050b6b12ca58066715d088e1a537535d938d (opens in a new tab)
- https://git.kernel.org/stable/c/33d1469b0124cc0baaea7a2032123b77a81e0940 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-86167 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-93288)Record last updated .