Race Condition Affecting kernel-rt-debug-core package, versions <0:4.18.0-513.24.1.rt7.326.el8_9
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Test your applications- Snyk ID SNYK-CENTOS8-KERNELRTDEBUGCORE-6138696
- published 22 Dec 2023
- disclosed 21 Dec 2023
How to fix?
Upgrade Centos:8 kernel-rt-debug-core to version 0:4.18.0-513.24.1.rt7.326.el8_9 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug-core package and not the kernel-rt-debug-core package as distributed by Centos.
See How to fix? for Centos:8 relevant fixed versions and status.
A race condition was found in the GSM 0710 tty multiplexor in the Linux kernel. This issue occurs when two threads execute the GSMIOC_SETCONF ioctl on the same tty file descriptor with the gsm line discipline enabled, and can lead to a use-after-free problem on a struct gsm_dlci while restarting the gsm mux. This could allow a local unprivileged user to escalate their privileges on the system.
References
- https://access.redhat.com/security/cve/CVE-2023-6546
- https://bugzilla.redhat.com/show_bug.cgi?id=2255498
- https://github.com/torvalds/linux/commit/3c4f8333b582487a2d1e02171f1465531cde53e3
- https://www.zerodayinitiative.com/advisories/ZDI-CAN-20527
- https://access.redhat.com/errata/RHSA-2024:1614
- http://www.openwall.com/lists/oss-security/2024/04/10/21
- http://www.openwall.com/lists/oss-security/2024/04/11/7
- http://www.openwall.com/lists/oss-security/2024/04/11/9
- http://www.openwall.com/lists/oss-security/2024/04/17/1
- http://www.openwall.com/lists/oss-security/2024/04/10/18
- http://www.openwall.com/lists/oss-security/2024/04/12/1
- http://www.openwall.com/lists/oss-security/2024/04/12/2
- http://www.openwall.com/lists/oss-security/2024/04/16/2