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FreeBSD: VID-13D37672-9791-11EB-B87A-901B0EF719AB (CVE-2021-29626): FreeBSD -- Memory disclosure by stale virtual memory mapping

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FreeBSD: VID-13D37672-9791-11EB-B87A-901B0EF719AB (CVE-2021-29626): FreeBSD -- Memory disclosure by stale virtual memory mapping

Severity
2
CVSS
(AV:L/AC:L/Au:N/C:P/I:N/A:N)
Published
04/06/2021
Created
11/08/2022
Added
11/04/2022
Modified
11/04/2022

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.

Solution(s)

  • freebsd-upgrade-base-11_4-release-p9
  • freebsd-upgrade-base-12_2-release-p6

References

  • CVE-2021-29626

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