CVE-2020-25641
A zero-length biovec request issued by the block subsystem could cause the kernel to enter an infinite loop, causing a denial of service.
Does this matter?
Lower severity and a low EPSS score (0.39%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.39% probability · 32th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-835
- Affected
- linux/linux kernel · redhat/enterprise linux · opensuse/leap · debian/debian linux · canonical/ubuntu linux
- Source
- secalert@redhat.com
EPSS 0.4% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00042.htmlMailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/10/06/9Mailing List, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1881424Issue Tracking, Patch, Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7e24969022cbd61ddc586f14824fc205661bb124Mailing List, Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00032.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00034.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/4576-1/Third Party Advisory
- https://www.kernel.org/doc/html/latest/block/biovecs.htmlVendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00042.htmlMailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/10/06/9Mailing List, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1881424Issue Tracking, Patch, Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7e24969022cbd61ddc586f14824fc205661bb124Mailing List, Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00032.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00034.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/4576-1/Third Party Advisory
- https://www.kernel.org/doc/html/latest/block/biovecs.htmlVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.