An out-of-bounds (OOB) memory access flaw was found in fs/f2fs/node.c in the f2fs module in the Linux kernel in versions before 5.12.0-rc4. A bounds check failure allows a local attacker to gain access to out-of-bounds memory leading to a system crash or a leak of internal kernel information. The highest threat from this vulnerability is to system availability.
https://www.mail-archive.com/[email protected]/msg2520013.html
https://www.openwall.com/lists/oss-security/2021/03/28/2
https://bugzilla.redhat.com/show_bug.cgi?id=1944298
http://www.openwall.com/lists/oss-security/2021/05/08/1
https://security.netapp.com/advisory/ntap-20210611-0007/
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html
Source: MITRE
Published: 2021-04-19
Updated: 2021-06-23
Type: CWE-125
Base Score: 5.6
Vector: AV:L/AC:L/Au:N/C:P/I:N/A:C
Impact Score: 7.8
Exploitability Score: 3.9
Severity: MEDIUM
Base Score: 7.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Impact Score: 5.2
Exploitability Score: 1.8
Severity: HIGH