CVE-2020-25641

Description

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://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://bugzilla.redhat.com/show_bug.cgi?id=1881424

http://www.openwall.com/lists/oss-security/2020/10/06/9

http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.html

https://usn.ubuntu.com/4576-1/

http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00042.html

https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html

https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html

Details

Risk Information

CVSS v2

CVSS v3