CVE-2025-68188

tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check()

State: Published
Severity: Not scored
Published: Dec 16, 2025
Updated: Oct 30, 2026
Reserved: Dec 16, 2025

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Description

In the Linux kernel, the following vulnerability has been resolved:

tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check()

Use RCU to avoid a pair of atomic operations and a potential UAF on dst_dev()->flags.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	cf1ef3f0719b4dcb74810ed507e2a2540f9811b4 to before d3fe882ed33a1e45921764f4615bf82db79d8dcdAffected cf1ef3f0719b4dcb74810ed507e2a2540f9811b4 to before e61dfd906ad027a4ade1f89e5fe706a3fcd52527Affected cf1ef3f0719b4dcb74810ed507e2a2540f9811b4 to before bc2b881a0896c111c1041d8bb1f92a3b3873ace5Affected cf1ef3f0719b4dcb74810ed507e2a2540f9811b4 to before 06da08d9355bf8e2070459bbedbe372ccc02cc0eAffected cf1ef3f0719b4dcb74810ed507e2a2540f9811b4 to before b62a59c18b692f892dcb8109c1c2e653b2abc95cAffected
LinuxLinux	4.12Affected before 4.12Not affected 6.1.191 through 6.1.Not affected 6.6.160 through 6.6.Not affected 6.12.58 through 6.12.Not affected 6.17.8 through 6.17.Not affected 6.18 and laterNot affected

Product

Versions

LinuxLinux

cf1ef3f0719b4dcb74810ed507e2a2540f9811b4 to before d3fe882ed33a1e45921764f4615bf82db79d8dcdAffected
cf1ef3f0719b4dcb74810ed507e2a2540f9811b4 to before e61dfd906ad027a4ade1f89e5fe706a3fcd52527Affected
cf1ef3f0719b4dcb74810ed507e2a2540f9811b4 to before bc2b881a0896c111c1041d8bb1f92a3b3873ace5Affected
cf1ef3f0719b4dcb74810ed507e2a2540f9811b4 to before 06da08d9355bf8e2070459bbedbe372ccc02cc0eAffected
cf1ef3f0719b4dcb74810ed507e2a2540f9811b4 to before b62a59c18b692f892dcb8109c1c2e653b2abc95cAffected

LinuxLinux

4.12Affected
before 4.12Not affected
6.1.191 through 6.1.*Not affected
6.6.160 through 6.6.*Not affected
6.12.58 through 6.12.*Not affected
6.17.8 through 6.17.*Not affected
6.18 and laterNot affected

References

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