Race Condition Affecting kernel-tools package, versions <0:4.18.0-477.67.1.el8_8
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Test your applications- Snyk ID SNYK-RHEL8-KERNELTOOLS-7683062
- published 14 Aug 2024
- disclosed 21 Feb 2024
How to fix?
Upgrade RHEL:8 kernel-tools to version 0:4.18.0-477.67.1.el8_8 or higher.
This issue was patched in RHSA-2024:5255.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-tools package and not the kernel-tools package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
tls: fix race between async notify and socket close
The submitting thread (one which called recvmsg/sendmsg) may exit as soon as the async crypto handler calls complete() so any code past that point risks touching already freed data.
Try to avoid the locking and extra flags altogether. Have the main thread hold an extra reference, this way we can depend solely on the atomic ref counter for synchronization.
Don't futz with reiniting the completion, either, we are now tightly controlling when completion fires.
References
- https://access.redhat.com/security/cve/CVE-2024-26583
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EZOU3745CWCDZ7EMKMXB2OEEIB5Q3IWM/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OX4EWCYDZRTOEMC2C6OF7ZACAP23SUB5/
- https://git.kernel.org/stable/c/6209319b2efdd8524691187ee99c40637558fa33
- https://git.kernel.org/stable/c/7a3ca06d04d589deec81f56229a9a9d62352ce01
- https://git.kernel.org/stable/c/86dc27ee36f558fe223dbdfbfcb6856247356f4a
- https://git.kernel.org/stable/c/aec7961916f3f9e88766e2688992da6980f11b8d
- https://git.kernel.org/stable/c/f17d21ea73918ace8afb9c2d8e734dbf71c2c9d7