medium
5.5
CWE
835
Advisory Published
CVE Published
CVE Published
Updated

CVE-2020-25641

First published: Tue Sep 22 2020(Updated: )

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.

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
redhat/kernel-alt<0:4.14.0-115.33.1.el7a
0:4.14.0-115.33.1.el7a
redhat/kernel-rt<0:4.18.0-240.rt7.54.el8
0:4.18.0-240.rt7.54.el8
redhat/kernel<0:4.18.0-240.el8
0:4.18.0-240.el8
redhat/kernel<0:4.18.0-147.34.1.el8_1
0:4.18.0-147.34.1.el8_1
redhat/kernel-rt<0:4.18.0-193.40.1.rt13.90.el8_2
0:4.18.0-193.40.1.rt13.90.el8_2
redhat/kernel<0:4.18.0-193.40.1.el8_2
0:4.18.0-193.40.1.el8_2
redhat/kernel<5.9
5.9
Linux Kernel<=5.8.13
Linux Kernel=5.9.0
Linux Kernel=5.9.0-rc1
Linux Kernel=5.9.0-rc2
Linux Kernel=5.9.0-rc3
Linux Kernel=5.9.0-rc4
Linux Kernel=5.9.0-rc5
Linux Kernel=5.9.0-rc6
Red Hat Enterprise Linux=7.0
Red Hat Enterprise Linux=8.0
SUSE Linux=15.1
SUSE Linux=15.2
Debian=9.0
Ubuntu=18.04
Ubuntu=20.04
debian/linux
5.10.223-1
5.10.234-1
6.1.123-1
6.1.128-1
6.12.12-1
6.12.17-1

Remedy

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Remedy

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

Remedy

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7e24969022cbd61ddc586f14824fc205661bb124

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2020-25641?

    CVE-2020-25641 is classified as a high severity vulnerability due to its potential for causing a denial of service.

  • How do I fix CVE-2020-25641?

    To fix CVE-2020-25641, update to the kernel versions 5.9 or higher as specified in the advisory.

  • What versions of Linux are affected by CVE-2020-25641?

    CVE-2020-25641 affects Linux kernel versions prior to 5.9-rc7.

  • Can CVE-2020-25641 be exploited locally?

    Yes, CVE-2020-25641 can be exploited by local attackers with basic privileges.

  • What kind of impact does CVE-2020-25641 have on affected systems?

    The impact of CVE-2020-25641 is a denial of service, leading to potential system unavailability.

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