CVE-2026-46161

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux475901aff15841fb0a81e7546517407779a9b061 < 0b43a70394ce492274e67463326be03e0a9897c5affected
LinuxLinux475901aff15841fb0a81e7546517407779a9b061 < c716ab3034f84f8a6c226814247b8c5ac9f95da1affected
LinuxLinux475901aff15841fb0a81e7546517407779a9b061 < 553e32adfa1a96b217651139a3f8c3b92b9984acaffected
LinuxLinux475901aff15841fb0a81e7546517407779a9b061 < 4af2e558e6fdfb972c61350653fd55d1f62b60a5affected
LinuxLinux475901aff15841fb0a81e7546517407779a9b061 < 9d8e03b9a2b1e8ce5c198bf3a409a629f4d02cdaaffected
LinuxLinux475901aff15841fb0a81e7546517407779a9b061 < 913d556e4bd1b56ed822815655b82c7bb54edc51affected
LinuxLinux475901aff15841fb0a81e7546517407779a9b061 < f9ddb621b2325eb69c95692958daf2bab4dea2c4affected
LinuxLinux475901aff15841fb0a81e7546517407779a9b061 < 9aa6d860b0930e2f72795665c42c44252a558a0caffected
LinuxLinux3.9affected
LinuxLinux0 < 3.9unaffected
LinuxLinux5.10.258 <= 5.10.*unaffected
LinuxLinux5.15.209 <= 5.15.*unaffected
LinuxLinux6.1.175 <= 6.1.*unaffected
LinuxLinux6.6.140 <= 6.6.*unaffected
LinuxLinux6.12.88 <= 6.12.*unaffected
LinuxLinux6.18.30 <= 6.18.*unaffected
LinuxLinux7.0.7 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References