CVE-2023-53081: ocfs2: fix data corruption after failed write

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-05-02 · updated 2026-06-17
Weakness: CWE-787

Description

In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix data corruption after failed write When buffered write fails to copy data into underlying page cache page, ocfs2_write_end_nolock() just zeroes out and dirties the page. This can leave dirty page beyond EOF and if page writeback tries to write this page before write succeeds and expands i_size, page gets into inconsistent state where page dirty bit is clear but buffer dirty bits stay set resulting in page data never getting written and so data copied to the page is lost. Fix the problem by invalidating page beyond EOF after failed write.

Affected products

Linux kernel: from 4.9.242 before 4.10; from 4.14.204 before 4.14.312; from 4.19.155 before 4.19.280; from 5.4.75 before 5.4.240; from 5.9.5 before 5.10.177; from 5.11 before 5.15.105 — fixed in 4.10, 4.14.312, 4.19.280, 5.10.177, 5.15.105, 5.4.240

How to fix

Upgrade to a fixed version: Linux kernel 4.10, 4.14.312, 4.19.280, 5.10.177. Check the vendor advisory for mitigations.

References

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