Loop with Unreachable Exit Condition ('Infinite Loop') Affecting perf package, versions <0:4.18.0-193.40.1.el8_2
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Test your applications- Snyk ID SNYK-RHEL8-PERF-3857427
- published 26 Jul 2021
- disclosed 30 Sep 2020
Introduced: 30 Sep 2020
CVE-2020-25641 Open this link in a new tabHow to fix?
Upgrade RHEL:8 perf to version 0:4.18.0-193.40.1.el8_2 or higher.
This issue was patched in RHSA-2021:0073.
NVD Description
Note: Versions mentioned in the description apply only to the upstream perf package and not the perf package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
A flaw was found in the Linux kernel's implementation of biovecs in versions before 5.9-rc7. A zero-length biovec request issued by the block subsystem could cause the kernel to enter an infinite loop, causing a denial of service. This flaw allows a local attacker with basic privileges to issue requests to a block device, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
References
- https://access.redhat.com/security/cve/CVE-2020-25641
- https://bugzilla.redhat.com/show_bug.cgi?id=1881424
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7e24969022cbd61ddc586f14824fc205661bb124
- https://www.kernel.org/doc/html/latest/block/biovecs.html
- https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html
- https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
- http://www.openwall.com/lists/oss-security/2020/10/06/9
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00042.html
- https://usn.ubuntu.com/4576-1/