CVE-2026-89653
Last modified
CVE-2026-89653 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 0.46% chance of exploitation in the next 30 days.
Description
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.
Metrics
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= d517b3983dd3106ca92d6c5d0d09415a4a09481c, < 3740c88ca9cb2210a8dbdd55ea4cec119fbe86fe; >= d517b3983dd3106ca92d6c5d0d09415a4a09481c, < 8c823bbab3c24e657469a84db96902ba82d4e8bb; >= d517b3983dd3106ca92d6c5d0d09415a4a09481c, < c4addccd05bacbef2144b4db14853d0308a218ac; >= d517b3983dd3106ca92d6c5d0d09415a4a09481c, < 736adee11af36e407ed902264f8b2fb5cf94b62f; >= d517b3983dd3106ca92d6c5d0d09415a4a09481c, < 4d298880f82c42383b36946bafde7ccf4d804c9b; >= d517b3983dd3106ca92d6c5d0d09415a4a09481c, < 96c3f5fbb0d5386e7111426f047f98cec4586674; >= d517b3983dd3106ca92d6c5d0d09415a4a09481c, < aedc9053d909508a5f56c3f49f885fc030df4730 |
| Linux | Linux | 5.15 |
References
Timeline
- Published
- Last Modified
- Status
- Received
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