CVE-2026-72107

Summary

In the Linux kernel, the following vulnerability has been resolved:

dm era: fix out-of-bounds memory access for non-zero start sector

dm-era tracks writes in target-relative blocks, but era_map() calculates the writeset block before applying the target offset. Tables with a non-zero start sector can therefore pass an absolute mapped-device block to metadata_current_marked().

If the absolute block is beyond the current writeset size, writeset_marked() tests past the end of the in-core bitset. KASAN reports this as a vmalloc-out-of-bounds access.

Apply the target offset before calculating the era block so writeset lookups use the target-relative block number.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxeec40579d84873dfb7021eb24c50360f073237c5 < fe94a0b14010a3c267ff9a2508afb4f27ff1c5bfaffected
LinuxLinuxeec40579d84873dfb7021eb24c50360f073237c5 < e3ffa8e492e5cdee62d916ee3e9244ccce2b73c5affected
LinuxLinuxeec40579d84873dfb7021eb24c50360f073237c5 < 9946a7176bd8c25ddd6e5f1799c54e572ee6bf0faffected
LinuxLinuxeec40579d84873dfb7021eb24c50360f073237c5 < 7e1822f83c5a1ee7b4a19e98edde8770a10b4c71affected
LinuxLinuxeec40579d84873dfb7021eb24c50360f073237c5 < db5f9b4601f0012038e5a2628aedec2f47933380affected
LinuxLinuxeec40579d84873dfb7021eb24c50360f073237c5 < 1fcb5e29dd7a5b85adb9d8b539911741d878e829affected
LinuxLinuxeec40579d84873dfb7021eb24c50360f073237c5 < bafe3e720cdac38cd7ea4eb7852a8f2dbe1bbfe6affected
LinuxLinuxeec40579d84873dfb7021eb24c50360f073237c5 < a868196f03c2b19418ae3d2b69e195d668a271e5affected
LinuxLinux3.15affected
LinuxLinux0 < 3.15unaffected
LinuxLinux5.10.261 <= 5.10.*unaffected
LinuxLinux5.15.212 <= 5.15.*unaffected
LinuxLinux6.1.178 <= 6.1.*unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.97 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References