Double Free Affecting kernel-rt package, versions *
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Test your applications- Snyk ID SNYK-RHEL7-KERNELRT-7338779
- published 21 Jun 2024
- disclosed 20 Jun 2024
Introduced: 20 Jun 2024
CVE-2022-48740 Open this link in a new tabHow to fix?
There is no fixed version for RHEL:7 kernel-rt.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt package and not the kernel-rt package as distributed by RHEL.
See How to fix? for RHEL:7 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
selinux: fix double free of cond_list on error paths
On error path from cond_read_list() and duplicate_policydb_cond_list() the cond_list_destroy() gets called a second time in caller functions, resulting in NULL pointer deref. Fix this by resetting the cond_list_len to 0 in cond_list_destroy(), making subsequent calls a noop.
Also consistently reset the cond_list pointer to NULL after freeing.
[PM: fix line lengths in the description]
References
- https://access.redhat.com/security/cve/CVE-2022-48740
- https://git.kernel.org/stable/c/186edf7e368c40d06cf727a1ad14698ea67b74ad
- https://git.kernel.org/stable/c/70caa32e6d81f45f0702070c0e4dfe945e92fbd7
- https://git.kernel.org/stable/c/7ed9cbf7ac0d4ed86b356e1b944304ae9ee450d4
- https://git.kernel.org/stable/c/f446089a268c8fc6908488e991d28a9b936293db