CVE-2026-53269
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: synproxy: add mutex to guard hook reference counting As the synproxy infrastructure register netfilter hooks on-demand when a user adds the first iptables target or nftables expression, if done concurrently they can race each other. Introduce a mutex to serialize the refcount control blocks access from both frontends. While a per namespace mutex might be more efficient, it is not needed for target/expression like SYNPROXY.
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-06-25 09:16:45.007000
Last modified
2026-11-06 17:18:17.430000
View original CVE JSON
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: synproxy: add mutex to guard hook reference counting\n\nAs the synproxy infrastructure register netfilter hooks on-demand when a\nuser adds the first iptables target or nftables expression, if done\nconcurrently they can race each other.\n\nIntroduce a mutex to serialize the refcount control blocks access from\nboth frontends. While a per namespace mutex might be more efficient, it\nis not needed for target/expression like SYNPROXY."
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