CVE-2024-26632: linux kernel Null Dereference — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: block: Fix iterating over an empty bio with bio_for_each_folio_all If the bio contains no data, bio_first_folio() calls page_folio() on a NULL pointer and oopses. Move the test that we've reached the end of the bio from bio_next_folio() to bio_first_folio(). [axboe: add unlikely() to error case]

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CVSS v3.1 Score

5.5

MEDIUM

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

Weakness Type (CWE)

CWE-476 CWE-476

Affected Products

Vendor	Product	Versions
linux	linux_kernel	5.17 — 6.1.75
linux	linux_kernel	6.2 — 6.6.14
linux	linux_kernel	6.7 — 6.7.2

References

Advisories & Patches

https://git.kernel.org/stable/c/7bed6f3d08b7af27b7015da8dc3acf2b9c1f21d7 https://git.kernel.org/stable/c/a6bd8182137a12d22d3f2cee463271bdcb491659 https://git.kernel.org/stable/c/c6350b5cb78e9024c49eaee6fdb914ad2903a5fe https://git.kernel.org/stable/c/ca3ede3f5893e2d26d4dbdef1eec28a8487fafde https://git.kernel.org/stable/c/7bed6f3d08b7af27b7015da8dc3acf2b9c1f21d7 https://git.kernel.org/stable/c/a6bd8182137a12d22d3f2cee463271bdcb491659 https://git.kernel.org/stable/c/c6350b5cb78e9024c49eaee6fdb914ad2903a5fe https://git.kernel.org/stable/c/ca3ede3f5893e2d26d4dbdef1eec28a8487fafde

Frequently Asked Questions

What is CVE-2024-26632? +

In the Linux kernel, the following vulnerability has been resolved: block: Fix iterating over an empty bio with bio_for_each_folio_all If the bio contains no data, bio_first_folio() calls page_folio() on a NULL pointer and oopses. Move the test that we've reached the end of the bio from bio_next_folio() to bio_first_folio(). [axboe: add unlikely() to error case] It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-26632? +

CVE-2024-26632 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-26632? +

CVE-2024-26632 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-2024-26632? +

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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