Use After Free Affecting kernel-debuginfo package, versions <0:4.14.177-139.253.amzn2
Threat Intelligence
EPSS
0.05% (16th
percentile)
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Test your applications- Snyk ID SNYK-AMZN2-KERNELDEBUGINFO-1680725
- published 27 Sep 2021
- disclosed 5 May 2020
Introduced: 5 May 2020
CVE-2020-12657 Open this link in a new tabHow to fix?
Upgrade Amazon-Linux:2 kernel-debuginfo to version 0:4.14.177-139.253.amzn2 or higher.
This issue was patched in ALAS2-2020-1440.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debuginfo package and not the kernel-debuginfo package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2 relevant fixed versions and status.
An issue was discovered in the Linux kernel before 5.6.5. There is a use-after-free in block/bfq-iosched.c related to bfq_idle_slice_timer_body.
References
- https://security.netapp.com/advisory/ntap-20200608-0001/
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12657
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.5
- https://github.com/torvalds/linux/commit/2f95fa5c955d0a9987ffdc3a095e2f4e62c5f2a9
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2f95fa5c955d0a9987ffdc3a095e2f4e62c5f2a9
- https://patchwork.kernel.org/patch/11447049/
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html
- https://usn.ubuntu.com/4363-1/
- https://usn.ubuntu.com/4367-1/
- https://usn.ubuntu.com/4368-1/
- https://usn.ubuntu.com/4369-1/
CVSS Scores
version 3.1