Medium severity · published Apr 7, 2021
CVE-2021-29626
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,…
5.5
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
Freebsd · Freebsd
before 11.4; 12.0 before 12.2; 11.4; 11.4; 11.4; 11.4; +17 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-29626
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-29626
Vendor Advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-21:08.vm.asc
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210423-0008/
More from Freebsd
10.0
CVE-2024-43102
umtx Kernel panic or Use-After-Free
10.0
CVE-2018-17160
In FreeBSD before 11.2-STABLE(r341486) and 11.2-RELEASE-p6, insufficient bounds checking in one of the device models provided by bhyve can permit a guest operating system to…
9.8
CVE-2026-101306
Multiple jail filesystem root escapes
9.8
CVE-2026-58082
Stack based buffer overflow in iconv(3)
9.8
CVE-2026-58081
Heap based buffer overflow in iconv(3)