CVE-2021-3493

overlayfs fs caps privilege escalation

References

Notes

 carnil> Debian ships as well a patch to allow enable unprivileged
 carnil> overlayfs mounts. Cf. #913880 present since 4.19.9-1 upload.
 carnil> One needs to explicitly load the module though with
 carnil> permit_mounts_in_userns (which will issue as well a security
 carnil> warning).

Bugs

Status

Branch Status
4.19-buster-security needed
4.19-upstream-stable N/A "Unprivileged users cannot mount overlayfs"
5.10-bullseye-security N/A "Fixed before branching point"
5.10-upstream-stable needed
6.1-bookworm-security N/A "Fixed before branch point"
6.1-upstream-stable N/A "Fixed before branch point"
6.6-upstream-stable unknown
6.8-upstream-stable unknown
sid released (5.10.38-1)
upstream released (5.11-rc1) [7c03e2cda4a584cadc398e8f6641ca9988a39d52]