CVE-2024-26632: block: Fix iterating over an empty bio with bio_for_each_folio_all
First published: Mon Mar 18 2024(Updated: )
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]
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.119-1 6.12.11-1 6.12.12-1 |
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Reference Links
- 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://launchpad.net/bugs/cve/CVE-2024-26632
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26632
- https://nvd.nist.gov/vuln/detail/CVE-2024-26632
- https://security-tracker.debian.org/tracker/CVE-2024-26632
- https://ubuntu.com/security/CVE-2024-26632
- https://git.kernel.org/linus/7bed6f3d08b7af27b7015da8dc3acf2b9c1f21d7
Frequently Asked Questions
What is the severity of CVE-2024-26632?
The severity of CVE-2024-26632 is classified as medium due to its potential to cause a system crash.
How do I fix CVE-2024-26632?
To fix CVE-2024-26632, update the Linux kernel to versions 5.10.223-1, 5.10.226-1, 6.1.119-1, 6.1.123-1, 6.12.10-1, or 6.12.11-1.
What systems are affected by CVE-2024-26632?
CVE-2024-26632 affects the Debian Linux packages listed in the affected software section.
What does CVE-2024-26632 exploit?
CVE-2024-26632 exploits a flaw in the block layer of the Linux kernel, leading to a NULL pointer dereference.
Is CVE-2024-26632 actively being exploited?
There are currently no known active exploits for CVE-2024-26632 in the wild.
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