- 9.8CriticalCVSS base score
- 0.50%Exploitation in 30 daysEPSS · top 56% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
Published
- 38 days later
· 38 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.50% · top 56% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
- affected d517b3983dd3106ca92d6c5d0d09415a4a09481c – < 3740c88ca9cb2210a8dbdd55ea4cec119fbe86fe
- affected d517b3983dd3106ca92d6c5d0d09415a4a09481c – < 8c823bbab3c24e657469a84db96902ba82d4e8bb
- affected d517b3983dd3106ca92d6c5d0d09415a4a09481c – < c4addccd05bacbef2144b4db14853d0308a218ac
- affected d517b3983dd3106ca92d6c5d0d09415a4a09481c – < 736adee11af36e407ed902264f8b2fb5cf94b62f
- affected d517b3983dd3106ca92d6c5d0d09415a4a09481c – < 4d298880f82c42383b36946bafde7ccf4d804c9b
- affected d517b3983dd3106ca92d6c5d0d09415a4a09481c – < 96c3f5fbb0d5386e7111426f047f98cec4586674
- affected d517b3983dd3106ca92d6c5d0d09415a4a09481c – < aedc9053d909508a5f56c3f49f885fc030df4730
- affected 5.15
- unaffected < 5.15
- unaffected 5.15.221 – ≤ 5.15.*
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.109 – ≤ 6.12.*
- unaffected 6.18.50 – ≤ 6.18.*
- unaffected 7.2.4 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References7
- https://git.kernel.org/stable/c/3740c88ca9cb2210a8dbdd55ea4cec119fbe86fe (opens in a new tab)
- https://git.kernel.org/stable/c/8c823bbab3c24e657469a84db96902ba82d4e8bb (opens in a new tab)
- https://git.kernel.org/stable/c/c4addccd05bacbef2144b4db14853d0308a218ac (opens in a new tab)
- https://git.kernel.org/stable/c/736adee11af36e407ed902264f8b2fb5cf94b62f (opens in a new tab)
- https://git.kernel.org/stable/c/4d298880f82c42383b36946bafde7ccf4d804c9b (opens in a new tab)
- https://git.kernel.org/stable/c/96c3f5fbb0d5386e7111426f047f98cec4586674 (opens in a new tab)
- https://git.kernel.org/stable/c/aedc9053d909508a5f56c3f49f885fc030df4730 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-76565 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-89653)Record last updated .