Answer in brief
CVE-2026-89653 records a Critical severity (CVSS 9.8) vulnerability in ceph: reject export_targets ranks >= CEPH_MAX_MDS in mdsmap decode. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=d517b3983dd3106ca92d6c5d0d09415a4a09481c <736adee11af36e407ed902264f8b2fb5cf94b62f || >=d517b3983dd3106ca92d6c5d0d09415a4a09481c <4d298880f82c42383b36946bafde7ccf4d804c9b || >=d517b3983dd3106ca92d6c5d0d09415a4a09481c <96c3f5fbb0d5386e7111426f047f98cec4586674 || >=d517b3983dd3106ca92d6c5d0d09415a4a09481c <aedc9053d909508a5f56c3f49f885fc030df4730 | 736adee11af36e407ed902264f8b2fb5cf94b62f, 4d298880f82c42383b36946bafde7ccf4d804c9b, 96c3f5fbb0d5386e7111426f047f98cec4586674, aedc9053d909508a5f56c3f49f885fc030df4730 |
| Linux/Linuxgeneric | 5.15 | Not reported |
| Linux/Linuxgeneric | >=d517b3983dd3106ca92d6c5d0d09415a4a09481c <3740c88ca9cb2210a8dbdd55ea4cec119fbe86fe || >=d517b3983dd3106ca92d6c5d0d09415a4a09481c <8c823bbab3c24e657469a84db96902ba82d4e8bb || >=d517b3983dd3106ca92d6c5d0d09415a4a09481c <c4addccd05bacbef2144b4db14853d0308a218ac || >=d517b3983dd3106ca92d6c5d0d09415a4a09481c <736adee11af36e407ed902264f8b2fb5cf94b62f || >=d517b3983dd3106ca92d6c5d0d09415a4a09481c <4d298880f82c42383b36946bafde7ccf4d804c9b || >=d517b3983dd3106ca92d6c5d0d09415a4a09481c <96c3f5fbb0d5386e7111426f047f98cec4586674 || >=d517b3983dd3106ca92d6c5d0d09415a4a09481c <aedc9053d909508a5f56c3f49f885fc030df4730 | 3740c88ca9cb2210a8dbdd55ea4cec119fbe86fe, 8c823bbab3c24e657469a84db96902ba82d4e8bb, c4addccd05bacbef2144b4db14853d0308a218ac, 736adee11af36e407ed902264f8b2fb5cf94b62f, 4d298880f82c42383b36946bafde7ccf4d804c9b, 96c3f5fbb0d5386e7111426f047f98cec4586674, aedc9053d909508a5f56c3f49f885fc030df4730 |
Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 11, 2026
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.
Quoted source text, attributed separately from HOL analysis.