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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2026-93288

netfilter: nfnetlink_log: wait for rcu grace period before freeing pernet state

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Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • c83fa19603bdaeef17b815713dbbe3230c8a34ee to < ba2e246aa294f9acd86194ea87fb6834ed0a37acaffected
  • c83fa19603bdaeef17b815713dbbe3230c8a34ee to < 5570d6c8b320dbcc602617ee08c27ce752fed65aaffected
  • c83fa19603bdaeef17b815713dbbe3230c8a34ee to < 3b9aa62d78ce80de47af2db472ff452398755213affected
  • c83fa19603bdaeef17b815713dbbe3230c8a34ee to < f4461654374576e9d5d0245fd534c46ad8509051affected
  • c83fa19603bdaeef17b815713dbbe3230c8a34ee to < dc20050b6b12ca58066715d088e1a537535d938daffected
  • c83fa19603bdaeef17b815713dbbe3230c8a34ee to < 33d1469b0124cc0baaea7a2032123b77a81e0940affected

Linux Linux

Default version status: affected

  • 4.12affected
  • 0 to < 4.12unaffected
  • 5.15.222 to ≤ 5.15.*unaffected
  • 6.1.189 to ≤ 6.1.*unaffected
  • 6.6.158 to ≤ 6.6.*unaffected
  • 6.12.111 to ≤ 6.12.*unaffected
  • 6.18.53 to ≤ 6.18.*unaffected
  • 7.2 to ≤ *unaffected

References