CVE-2021-29626
MEDIUMFreeBSD < 11.4-RELEASE p9, 12.2-RELEASE p6, 13.0-RC5 p1 - Unauthenticated Use-After-Free in Shared Memory Page Mappings
Title source: llmDescription
In FreeBSD 13.0-STABLE before n245117, 12.2-STABLE before r369551, 11.4-STABLE before r369559, 13.0-RC5 before p1, 12.2-RELEASE before p6, and 11.4-RELEASE before p9, copy-on-write logic failed to invalidate shared memory page mappings between multiple processes allowing an unprivileged process to maintain a mapping after it is freed, allowing the process to read private data belonging to other processes or the kernel.
References (2)
Core 2
Core References
Vendor Advisory x_refsource_misc
https://security.FreeBSD.org/advisories/FreeBSD-SA-21:08.vm.asc
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20210423-0008/
Scores
CVSS v3
5.5
EPSS
0.0006
EPSS Percentile
18.7%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Details
CWE
CWE-416
Status
published
Products (4)
freebsd/freebsd
11.4 (9 CPE variants)
freebsd/freebsd
12.2 (3 CPE variants)
freebsd/freebsd
13.0 beta1 (9 CPE variants)
freebsd/freebsd
< 11.4
Published
Apr 07, 2021
Tracked Since
Feb 18, 2026