CVE-2026-93288netfilter: nfnetlink_log: wait for rcu grace period before freeing pernet state
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 3, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from c83fa19603bdaeef17b815713dbbe3230c8a34ee before ba2e246aa294f9acd86194ea87fb6834ed0a37ac; from c83fa19603bdaeef17b815713dbbe3230c8a34ee before 5570d6c8b320dbcc602617ee08c27ce752fed65a; from c83fa19603bdaeef17b815713dbbe3230c8a34ee before 3b9aa62d78ce80de47af2db472ff452398755213; from c83fa19603bdaeef17b815713dbbe3230c8a34ee before f4461654374576e9d5d0245fd534c46ad8509051; from c83fa19603bdaeef17b815713dbbe3230c8a34ee before dc20050b6b12ca58066715d088e1a537535d938d; from c83fa19603bdaeef17b815713dbbe3230c8a34ee before 33d1469b0124cc0baaea7a2032123b77a81e0940 | CNA record |
References
- 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
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.