CVE-2026-46070

Summary

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

md/raid5: validate payload size before accessing journal metadata

r5c_recovery_analyze_meta_block() and r5l_recovery_verify_data_checksum_for_mb() iterate over payloads in a journal metadata block using on-disk payload size fields without validating them against the remaining space in the metadata block.

A corrupted journal contains payload sizes extending beyond the PAGE_SIZE boundary can cause out-of-bounds reads when accessing payload fields or computing offsets.

Add bounds validation for each payload type to ensure the full payload fits within meta_size before processing.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxb4c625c67362b3940f619c1a836b4e8329106658 < c96c6f01d84b5c67db1bf1cc8591c0b7146826fcaffected
LinuxLinuxb4c625c67362b3940f619c1a836b4e8329106658 < ef4851d8324fd978ca1ff9ec76a275438f887743affected
LinuxLinuxb4c625c67362b3940f619c1a836b4e8329106658 < 28d3ff7109c66e99dc1b7cddacb5c760849620efaffected
LinuxLinuxb4c625c67362b3940f619c1a836b4e8329106658 < 33698bd1b2db9764a29df7751533d33967ff5c98affected
LinuxLinuxb4c625c67362b3940f619c1a836b4e8329106658 < c3a1cf78bd1bbb51b2cc5189b4743056553c1e0eaffected
LinuxLinuxb4c625c67362b3940f619c1a836b4e8329106658 < 73ce72edd113374801045924d4417199963f73a3affected
LinuxLinuxb4c625c67362b3940f619c1a836b4e8329106658 < 406aa86394ead347c47428fb51b6359bdaa2257daffected
LinuxLinuxb4c625c67362b3940f619c1a836b4e8329106658 < b0cc3ae97e893bf54bbce447f4e9fd2e0b88bff9affected
LinuxLinux4.10affected
LinuxLinux0 < 4.10unaffected
LinuxLinux5.10.258 <= 5.10.*unaffected
LinuxLinux5.15.209 <= 5.15.*unaffected
LinuxLinux6.1.175 <= 6.1.*unaffected
LinuxLinux6.6.140 <= 6.6.*unaffected
LinuxLinux6.12.86 <= 6.12.*unaffected
LinuxLinux6.18.27 <= 6.18.*unaffected
LinuxLinux7.0.4 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References