Use After Free Affecting kernel-debug-modules package, versions <0:4.18.0-305.25.1.el8_4
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Test your applications- Snyk ID SNYK-RHEL8-KERNELDEBUGMODULES-4115881
- published 26 Jul 2021
- disclosed 7 Jun 2021
Introduced: 7 Jun 2021
CVE-2020-36385 Open this link in a new tabHow to fix?
Upgrade RHEL:8 kernel-debug-modules to version 0:4.18.0-305.25.1.el8_4 or higher.
This issue was patched in RHSA-2021:4056.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug-modules package and not the kernel-debug-modules package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
An issue was discovered in the Linux kernel before 5.10. drivers/infiniband/core/ucma.c has a use-after-free because the ctx is reached via the ctx_list in some ucma_migrate_id situations where ucma_close is called, aka CID-f5449e74802c.
References
- https://access.redhat.com/security/cve/CVE-2020-36385
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f5449e74802c1112dea984aec8af7a33c4516af1
- https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-ucma_close-2
- https://syzkaller.appspot.com/bug?id=457491c4672d7b52c1007db213d93e47c711fae6
- https://access.redhat.com/errata/RHSA-2021:4056
- https://security.netapp.com/advisory/ntap-20210720-0004/
- https://www.starwindsoftware.com/security/sw-20220802-0002/