CVE-2023-53081: linux kernel Memory Corruption — Fix

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.

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CVSS v3.1 Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-787 Out-of-bounds Write

Affected Products

Vendor	Product	Versions
linux	linux_kernel	4.9.242 — 4.10
linux	linux_kernel	4.14.204 — 4.14.312
linux	linux_kernel	4.19.155 — 4.19.280
linux	linux_kernel	5.4.75 — 5.4.240
linux	linux_kernel	5.9.5 — 5.10.177
linux	linux_kernel	5.11 — 5.15.105
linux	linux_kernel	5.16 — 6.1.21
linux	linux_kernel	6.2 — 6.2.8
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/1629f6f522b2d058019710466a84b240683bbee3 https://git.kernel.org/stable/c/205759c6c18f54659b0b5976b14a52d1b3eb9f57 https://git.kernel.org/stable/c/47eb055ad3588fc96d34e9e1dd87b210ce62906b https://git.kernel.org/stable/c/4c24eb49ab44351424ac8fe8567f91ea48a06089 https://git.kernel.org/stable/c/90410bcf873cf05f54a32183afff0161f44f9715 https://git.kernel.org/stable/c/91d7a4bd5656552d6259e2d0f8859f9e8cc5ef68 https://git.kernel.org/stable/c/a9e53869cb43c96d6d851c491fd4e26430ab6ba6 https://git.kernel.org/stable/c/c26f3ff4c0be590c1250f945ac2e4fc5fcdc5f45

Frequently Asked Questions

What is CVE-2023-53081? +

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. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2023-53081? +

CVE-2023-53081 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2023-53081? +

CVE-2023-53081 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-53081? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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