Vulnerability · Published Apr 7, 2021 · Assigned by freebsd

CVE-2021-29626

Medium 5.5

In plain English

A medium-severity security flaw in FreeBSD. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities).

Severity (CVSS NVD)5.5Medium

Exploit odds (30 days)0.3%top 72.9% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
n/a	FreeBSD	FreeBSD 12.2-RELEASE before p6, 11.4-RELEASE before p9

References

https://security.FreeBSD.org/advisories/FreeBSD-SA-21:08.vm.asc x_refsource_MISC
https://security.netapp.com/advisory/ntap-20210423-0008/ x_refsource_CONFIRM