CVE-2026-89653Critical· 9.8▾ MidnightIn 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 numbe…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 53.9 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
— → 7.5
— → 9.8
none → critical
9.8 → 7.5
critical → high
7.5 → 9.8
high → critical
9.8 → 7
critical → high
7 → 8.1
0.2% → 0.7%
8.1 → 9.8
high → critical
Last analysed / modified upstream
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.
Linux >= d517b3983dd3106ca92d6c5d0d09415a4a09481c < 3740c88ca9cb2210a8dbdd55ea4cec119fbe86feLinux >= d517b3983dd3106ca92d6c5d0d09415a4a09481c < 8c823bbab3c24e657469a84db96902ba82d4e8bbLinux >= d517b3983dd3106ca92d6c5d0d09415a4a09481c < c4addccd05bacbef2144b4db14853d0308a218acLinux >= d517b3983dd3106ca92d6c5d0d09415a4a09481c < 736adee11af36e407ed902264f8b2fb5cf94b62fLinux >= d517b3983dd3106ca92d6c5d0d09415a4a09481c < 4d298880f82c42383b36946bafde7ccf4d804c9bLinux >= d517b3983dd3106ca92d6c5d0d09415a4a09481c < 96c3f5fbb0d5386e7111426f047f98cec4586674Linux >= d517b3983dd3106ca92d6c5d0d09415a4a09481c < aedc9053d909508a5f56c3f49f885fc030df4730Linux 5.15Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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