Vulnerability details
CVE-2026-93288
Linux Linux
netfilter: nfnetlink_log: wait for rcu grace period before freeing pernet state
CVSS 3.1
7.8High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.8High | 3.1 | CVEProject cvelistV5 (CNA) (Linux) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Linux | Linux | 4.12 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | c83fa19603bdaeef17b815713dbbe3230c8a34ee ≤ v < 5570d6c8b320dbcc602617ee08c27ce752fed65a | CVEProject cvelistV5 (CNA) |
| Linux | Linux | c83fa19603bdaeef17b815713dbbe3230c8a34ee ≤ v < 3b9aa62d78ce80de47af2db472ff452398755213 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | c83fa19603bdaeef17b815713dbbe3230c8a34ee ≤ v < ba2e246aa294f9acd86194ea87fb6834ed0a37ac | CVEProject cvelistV5 (CNA) |
| Linux | Linux | c83fa19603bdaeef17b815713dbbe3230c8a34ee ≤ v < dc20050b6b12ca58066715d088e1a537535d938d | CVEProject cvelistV5 (CNA) |
| Linux | Linux | c83fa19603bdaeef17b815713dbbe3230c8a34ee ≤ v < 33d1469b0124cc0baaea7a2032123b77a81e0940 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | c83fa19603bdaeef17b815713dbbe3230c8a34ee ≤ v < f4461654374576e9d5d0245fd534c46ad8509051 | CVEProject cvelistV5 (CNA) |
References and advisories
6- https://git.kernel.org/stable/c/ba2e246aa294f9acd86194ea87fb6834ed0a37ac
- https://git.kernel.org/stable/c/5570d6c8b320dbcc602617ee08c27ce752fed65a
- https://git.kernel.org/stable/c/3b9aa62d78ce80de47af2db472ff452398755213
- https://git.kernel.org/stable/c/f4461654374576e9d5d0245fd534c46ad8509051
- https://git.kernel.org/stable/c/dc20050b6b12ca58066715d088e1a537535d938d
- https://git.kernel.org/stable/c/33d1469b0124cc0baaea7a2032123b77a81e0940
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Details
- Published
- 2026-09-24
- Last updated
- 2026-10-03
- State
- Published
- Assigner (CNA)
- Linux
Exploit prediction (EPSS)
0.12%
Probability of exploitation in 30 days
2.5%
Percentile (among all CVEs)
Weaknesses (CWE)
- —