Use of Uninitialized Resource The advisory has been revoked - it doesn't affect any version of package kernel-cross-headers (opens in a new tab)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL8-KERNELCROSSHEADERS-4254443
- published16 Dec 2021
- disclosed14 Dec 2021
Introduced: 14 Dec 2021
CVE-2021-44733 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:8.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-cross-headers package and not the kernel-cross-headers package as distributed by RHEL.
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
- https://github.com/pjlantz/optee-qemu