CVE-2026-46161: Linux kernel · md/raid10: fix divide-by-zero in setup_geo() with zero far_copies
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in f9ddb621b2325eb69c95692958daf2bab4dea2c4 : update Linux kernel when convenient.
Data as of 6 Nov 2026, 16:34 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-11-06.
- Patch
- Available – fixed in f9ddb621b2325eb69c95692958daf2bab4dea2c4, c716ab3034f84f8a6c226814247b8c5ac9f95da1, 913d556e4bd1b56ed822815655b82c7bb54edc51 +5
Exploitation evidence
Disclosed: evidence found.
CVE published 28 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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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.
References
- git.kernel.org/stable/c/0b43a70394ce492274e67463326be03e0a9897c5 (opens in a new tab)
- git.kernel.org/stable/c/c716ab3034f84f8a6c226814247b8c5ac9f95da1 (opens in a new tab)
- git.kernel.org/stable/c/553e32adfa1a96b217651139a3f8c3b92b9984ac (opens in a new tab)
- git.kernel.org/stable/c/4af2e558e6fdfb972c61350653fd55d1f62b60a5 (opens in a new tab)
- git.kernel.org/stable/c/9d8e03b9a2b1e8ce5c198bf3a409a629f4d02cda (opens in a new tab)
- git.kernel.org/stable/c/913d556e4bd1b56ed822815655b82c7bb54edc51 (opens in a new tab)
- git.kernel.org/stable/c/f9ddb621b2325eb69c95692958daf2bab4dea2c4 (opens in a new tab)
- git.kernel.org/stable/c/9aa6d860b0930e2f72795665c42c44252a558a0c (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-784472.html (opens in a new tab)