Description

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

nilfs2: fix data corruption in dsync block recovery for small block sizes

The helper function nilfs_recovery_copy_block() of
nilfs_recovery_dsync_blocks(), which recovers data from logs created by
data sync writes during a mount after an unclean shutdown, incorrectly
calculates the on-page offset when copying repair data to the file's page
cache. In environments where the block size is smaller than the page
size, this flaw can cause data corruption and leak uninitialized memory
bytes during the recovery process.

Fix these issues by correcting this byte offset calculation on the page.

Classification

CVE ID: CVE-2024-26697

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 15.26% (scored less or equal to compared to others)

EPSS Date: 2025-02-04 (when was this score calculated)

References

https://git.kernel.org/stable/c/5278c3eb6bf5896417572b52adb6be9d26e92f65
https://git.kernel.org/stable/c/a6efe6dbaaf504f5b3f8a5c3f711fe54e7dda0ba
https://git.kernel.org/stable/c/364a66be2abdcd4fd426ffa44d9b8f40aafb3caa
https://git.kernel.org/stable/c/120f7fa2008e3bd8b7680b4ab5df942decf60fd5
https://git.kernel.org/stable/c/9c9c68d64fd3284f7097ed6ae057c8441f39fcd3
https://git.kernel.org/stable/c/2e1480538ef60bfee5473dfe02b1ecbaf1a4aa0d
https://git.kernel.org/stable/c/2000016bab499074e6248ea85aeea7dd762355d9
https://git.kernel.org/stable/c/67b8bcbaed4777871bb0dcc888fb02a614a98ab1

Timeline