CVE-2026-89653 (GCVE-0-2026-89653)
Vulnerability from cvelistv5
Published
2026-09-11 19:45
Modified
2026-10-19 08:50
Severity ?
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: ceph: reject export_targets ranks >= CEPH_MAX_MDS in mdsmap decode MDSMap export_targets entries are monitor controlled. check_new_map() uses each entry as a bit number in a fixed stack bitmap, so a rank outside the protocol namespace can make set_bit() write past the end of the array. Reject ranks outside CEPH_MAX_MDS while decoding the map. Do not validate against possible_max_rank here because maps may legitimately reference ranks beyond a temporarily reduced max_mds.
References
Impacted products
Vendor Product Version
Linux Linux Version: d517b3983dd3106ca92d6c5d0d09415a4a09481c
Version: d517b3983dd3106ca92d6c5d0d09415a4a09481c
Version: d517b3983dd3106ca92d6c5d0d09415a4a09481c
Version: d517b3983dd3106ca92d6c5d0d09415a4a09481c
Version: d517b3983dd3106ca92d6c5d0d09415a4a09481c
Version: d517b3983dd3106ca92d6c5d0d09415a4a09481c
Version: d517b3983dd3106ca92d6c5d0d09415a4a09481c
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