CVE-2026-93288
Last modified
CVE-2026-93288 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.
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.
Metrics
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < f4461654374576e9d5d0245fd534c46ad8509051; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < dc20050b6b12ca58066715d088e1a537535d938d; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 33d1469b0124cc0baaea7a2032123b77a81e0940; < 6.12.111; < 6.18.53 |
| Linux | Linux | All versions |
References
Timeline
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