What’s Vulnerable › Vulnerabilities
CVE-2020-25641
- Severity: medium (CVSS 5.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2020-10-06 · updated 2026-06-17
- Weakness: CWE-835
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.
Affected products
- Canonical Ubuntu Linux: 18.04, 20.04
- Debian Linux: 9.0
- Linux kernel: through 5.8.13; 5.9.0, 5.9.0-rc1, 5.9.0-rc2, 5.9.0-rc3, 5.9.0-rc4, 5.9.0-rc5 (+1)
- openSUSE Leap: 15.1, 15.2
- Red Hat Enterprise Linux: 7.0, 8.0
References
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00042.html
- http://www.openwall.com/lists/oss-security/2020/10/06/9
- 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://lists.debian.org/debian-lts-announce/2020/10/msg00032.html
- https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
- https://usn.ubuntu.com/4576-1/
- https://www.kernel.org/doc/html/latest/block/biovecs.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00042.html
- http://www.openwall.com/lists/oss-security/2020/10/06/9
Get alerted when CVE-2020-25641 or the next vulnerability affects your stack