Vulnerability Monitor

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CVE-2020-25641

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.

Published

2020-10-06T14:15:12.603

Last Modified

2024-11-21T05:18:18.953

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.5 (MEDIUM)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:N/I:N/A:C

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: COMPLETE

Exploitability Score

3.9

Impact Score

6.9

Weaknesses

Type: Secondary
CWE-835
Type: Primary
CWE-835

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	linux	linux_kernel	≤ 5.8.13	Yes
Operating System	linux	linux_kernel	5.9.0	Yes
Operating System	linux	linux_kernel	5.9.0	Yes
Operating System	linux	linux_kernel	5.9.0	Yes
Operating System	linux	linux_kernel	5.9.0	Yes
Operating System	linux	linux_kernel	5.9.0	Yes
Operating System	linux	linux_kernel	5.9.0	Yes
Operating System	linux	linux_kernel	5.9.0	Yes
Operating System	redhat	enterprise_linux	7.0	Yes
Operating System	redhat	enterprise_linux	8.0	Yes
Operating System	opensuse	leap	15.1	Yes
Operating System	opensuse	leap	15.2	Yes
Operating System	debian	debian_linux	9.0	Yes
Operating System	canonical	ubuntu_linux	18.04	Yes
Operating System	canonical	ubuntu_linux	20.04	Yes

References

http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.html Mailing List, Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00042.html Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2020/10/06/9 Mailing List, Third Party Advisory ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=1881424 Issue Tracking, Patch, Third Party Advisory ([email protected])
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7e24969022cbd61ddc586f14824fc205661bb124 Mailing List, Patch, Vendor Advisory ([email protected])
https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html Mailing List, Third Party Advisory ([email protected])
https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html Mailing List, Third Party Advisory ([email protected])
https://usn.ubuntu.com/4576-1/ Third Party Advisory ([email protected])
https://www.kernel.org/doc/html/latest/block/biovecs.html Vendor Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00042.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2020/10/06/9 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=1881424 Issue Tracking, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7e24969022cbd61ddc586f14824fc205661bb124 Mailing List, Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://usn.ubuntu.com/4576-1/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.kernel.org/doc/html/latest/block/biovecs.html Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)