CVE-2026-46161md/raid10: fix divide-by-zero in setup_geo() with zero far_copies
- 5.5MediumCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% 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: md/raid10: fix divide-by-zero in setup_geo() with zero far_copies setup_geo() extracts near_copies (nc) and far_copies (fc) from the user-provided layout parameter without checking for zero. When fc=0 with the "improved" far set layout selected, 'geo->far_set_size = disks / fc' triggers a divide-by-zero. Validate nc and fc immediately after extraction, returning -1 if either is zero.
Timeline
ID reserved
By Linux
- 15 days later
· 15 days later
Published
- 5 months later
· 5 months 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 |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 475901aff15841fb0a81e7546517407779a9b061 – < 0b43a70394ce492274e67463326be03e0a9897c5
- affected 475901aff15841fb0a81e7546517407779a9b061 – < c716ab3034f84f8a6c226814247b8c5ac9f95da1
- affected 475901aff15841fb0a81e7546517407779a9b061 – < 553e32adfa1a96b217651139a3f8c3b92b9984ac
- affected 475901aff15841fb0a81e7546517407779a9b061 – < 4af2e558e6fdfb972c61350653fd55d1f62b60a5
- affected 475901aff15841fb0a81e7546517407779a9b061 – < 9d8e03b9a2b1e8ce5c198bf3a409a629f4d02cda
- affected 475901aff15841fb0a81e7546517407779a9b061 – < 913d556e4bd1b56ed822815655b82c7bb54edc51
- affected 475901aff15841fb0a81e7546517407779a9b061 – < f9ddb621b2325eb69c95692958daf2bab4dea2c4
- affected 475901aff15841fb0a81e7546517407779a9b061 – < 9aa6d860b0930e2f72795665c42c44252a558a0c
- affected 3.9
- unaffected < 3.9
- unaffected 5.10.258 – ≤ 5.10.*
- unaffected 5.15.209 – ≤ 5.15.*
- unaffected 6.1.175 – ≤ 6.1.*
- unaffected 6.6.140 – ≤ 6.6.*
- unaffected 6.12.88 – ≤ 6.12.*
- unaffected 6.18.30 – ≤ 6.18.*
- unaffected 7.0.7 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References9
- https://git.kernel.org/stable/c/0b43a70394ce492274e67463326be03e0a9897c5 (opens in a new tab)
- https://git.kernel.org/stable/c/c716ab3034f84f8a6c226814247b8c5ac9f95da1 (opens in a new tab)
- https://git.kernel.org/stable/c/553e32adfa1a96b217651139a3f8c3b92b9984ac (opens in a new tab)
- https://git.kernel.org/stable/c/4af2e558e6fdfb972c61350653fd55d1f62b60a5 (opens in a new tab)
- https://git.kernel.org/stable/c/9d8e03b9a2b1e8ce5c198bf3a409a629f4d02cda (opens in a new tab)
- https://git.kernel.org/stable/c/913d556e4bd1b56ed822815655b82c7bb54edc51 (opens in a new tab)
- https://git.kernel.org/stable/c/f9ddb621b2325eb69c95692958daf2bab4dea2c4 (opens in a new tab)
- https://git.kernel.org/stable/c/9aa6d860b0930e2f72795665c42c44252a558a0c (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html (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-2026-32788 (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-2026-46161)Record last updated .