Use of Uninitialized Resource Affecting kernel-debug-core package, versions <0:4.18.0-372.9.1.el8
Threat Intelligence
EPSS
0.12% (48th
percentile)
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Test your applications- Snyk ID SNYK-RHEL8-KERNELDEBUGCORE-4250332
- published 16 Dec 2021
- disclosed 14 Dec 2021
Introduced: 14 Dec 2021
CVE-2021-44733 Open this link in a new tabHow to fix?
Upgrade RHEL:8 kernel-debug-core to version 0:4.18.0-372.9.1.el8 or higher.
This issue was patched in RHSA-2022:1988.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug-core package and not the kernel-debug-core package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
A use-after-free exists in drivers/tee/tee_shm.c in the TEE subsystem in the Linux kernel through 5.15.11. This occurs because of a race condition in tee_shm_get_from_id during an attempt to free a shared memory object.
References
- https://access.redhat.com/security/cve/CVE-2021-44733
- https://access.redhat.com/errata/RHSA-2022:1988
- https://lore.kernel.org/lkml/20211215092501.1861229-1-jens.wiklander@linaro.org/
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dfd0743f1d9ea76931510ed150334d571fbab49d
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/drivers/tee/tee_shm.c
- https://github.com/pjlantz/optee-qemu/blob/main/README.md
- https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
- https://lore.kernel.org/lkml/20211215092501.1861229-1-jens.wiklander%40linaro.org/
- https://security.netapp.com/advisory/ntap-20220114-0003/
- https://www.debian.org/security/2022/dsa-5096
CVSS Scores
version 3.1