CVE-2026-72041Critical vulnerability in Linux kernel (espintcp)
In the Linux kernel, the following vulnerability has been resolved: espintcp: use sk_msg_free_partial to fix partial send sk_msg_free_partial() ensures consistency of the skmsg at every iteration, without having to manually handle uncharges and offsets. This simplifies the code, and fixes some bugs in skmsg accounting when we don't send the full contents.
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A critical vulnerability was identified in the Linux kernel's espintcp implementation. This flaw in network socket message accounting could allow a remote attacker to cause memory corruption or system instability, making kernel updates essential for systems using IPsec over TCP.
Relevant roles
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HEPSS
Technical description
In the Linux kernel, the following vulnerability has been resolved: espintcp: use sk_msg_free_partial to fix partial send sk_msg_free_partial() ensures consistency of the skmsg at every iteration, without having to manually handle uncharges and offsets. This simplifies the code, and fixes some bugs in skmsg accounting when we don't send the full contents.
References
- https://git.kernel.org/stable/c/007800408002d871f5699bdb944f985896730b8f
- https://git.kernel.org/stable/c/14c0b42c8a2cd9b5361bbff45b52f69c62c6a286
- https://git.kernel.org/stable/c/4ea8c051b4bd7feec7749a980f2f70e1782b84d7
- https://git.kernel.org/stable/c/518dcb84b997dff461800b079e5f2596389f766a
- https://git.kernel.org/stable/c/54d73f18f8919735f4d04d6f43374f75756c0180
- https://git.kernel.org/stable/c/a338ce41bc933d8f74c39d9b3b6f1d8ca53d9714
- https://git.kernel.org/stable/c/a66d45e0ce6d73cd79962d422388e61bfaf0cb50
- https://git.kernel.org/stable/c/a977f78adce40b39d90d9567e7987bb110102810