Vulnerability 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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 5.8.13 |
| Redhat | Enterprise Linux | 7.0 |
| Opensuse | Leap | 15.1 |
| Debian | Debian Linux | 9.0 |
| Canonical | Ubuntu Linux | 18.04 |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00042.htmlMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2020/10/06/9Mailing ListThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1881424Issue TrackingPatchThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7eMailing ListPatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00032.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00034.htmlMailing ListThird 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 ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00042.htmlMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2020/10/06/9Mailing ListThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1881424Issue TrackingPatchThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7eMailing ListPatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00032.htmlMailing ListThird Party Advisory
FAQ
What is CVE-2020-25641?
CVE-2020-25641 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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...
How severe is CVE-2020-25641?
CVE-2020-25641 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-25641?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Redhat Enterprise Linux, Opensuse Leap, Debian Debian Linux, Canonical Ubuntu Linux.