CVE-2026-46161md/raid10: fix divide-by-zero in setup_geo() with zero far_copies
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 475901aff15841fb0a81e7546517407779a9b061 builds before 0b43a70394ce492274e67463326be03e0a9897c5; from 475901aff15841fb0a81e7546517407779a9b061 before c716ab3034f84f8a6c226814247b8c5ac9f95da1; 475901aff15841fb0a81e7546517407779a9b061 builds before 553e32adfa1a96b217651139a3f8c3b92b9984ac; 475901aff15841fb0a81e7546517407779a9b061 builds before 4af2e558e6fdfb972c61350653fd55d1f62b60a5; 475901aff15841fb0a81e7546517407779a9b061 builds before 9d8e03b9a2b1e8ce5c198bf3a409a629f4d02cda; 475901aff15841fb0a81e7546517407779a9b061 builds before 913d556e4bd1b56ed822815655b82c7bb54edc51; from 475901aff15841fb0a81e7546517407779a9b061 before f9ddb621b2325eb69c95692958daf2bab4dea2c4; 475901aff15841fb0a81e7546517407779a9b061 builds before 9aa6d860b0930e2f72795665c42c44252a558a0c | CNA record |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | all versions | CISA ADP |
linux linux_kernel linux:linux_kernel | from 3.9.1 before 5.10.258; from 5.11 before 5.15.209; from 5.16 before 6.1.175; from 6.2 before 6.6.140; from 6.7 before 6.12.88; from 6.13 before 6.18.30; from 6.19 before 7.0.7; 3.9; and 8 more ranges | NVD |
References
- https://git.kernel.org/stable/c/0b43a70394ce492274e67463326be03e0a9897c5patch
- https://git.kernel.org/stable/c/c716ab3034f84f8a6c226814247b8c5ac9f95da1patch
- https://git.kernel.org/stable/c/553e32adfa1a96b217651139a3f8c3b92b9984acpatch
- https://git.kernel.org/stable/c/4af2e558e6fdfb972c61350653fd55d1f62b60a5patch
- https://git.kernel.org/stable/c/9d8e03b9a2b1e8ce5c198bf3a409a629f4d02cdapatch
- https://git.kernel.org/stable/c/913d556e4bd1b56ed822815655b82c7bb54edc51patch
- https://git.kernel.org/stable/c/f9ddb621b2325eb69c95692958daf2bab4dea2c4patch
- https://git.kernel.org/stable/c/9aa6d860b0930e2f72795665c42c44252a558a0cpatch
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.