- Vulnerability/
- CVE-2024-26955
CVE-2024-26955: nilfs2: prevent kernel bug at submit_bh_wbc()
First published: Wed May 01 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: nilfs2: prevent kernel bug at submit_bh_wbc() Fix a bug where nilfs_get_block() returns a successful status when searching and inserting the specified block both fail inconsistently. If this inconsistent behavior is not due to a previously fixed bug, then an unexpected race is occurring, so return a temporary error -EAGAIN instead. This prevents callers such as __block_write_begin_int() from requesting a read into a buffer that is not mapped, which would cause the BUG_ON check for the BH_Mapped flag in submit_bh_wbc() to fail.
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/0c8aa4cfda4e4adb15d5b6536d155eca9c9cd44c
- https://git.kernel.org/stable/c/192e9f9078c96be30b31c4b44d6294b24520fce5
- https://git.kernel.org/stable/c/269cdf353b5bdd15f1a079671b0f889113865f20
- https://git.kernel.org/stable/c/32eaee72e96590a75445c8a6c7c1057673b47e07
- https://git.kernel.org/stable/c/48d443d200237782dc82e6b60663ec414ef02e39
- https://git.kernel.org/stable/c/76ffbe911e2798c7296968f5fd72f7bf67207a8d
- https://git.kernel.org/stable/c/91e4c4595fae5e87069e44687ae879091783c183
- https://git.kernel.org/stable/c/ca581d237f3b8539c044205bb003de71d75d227c
- https://git.kernel.org/stable/c/f0fe7ad5aff4f0fcf988913313c497de85f1e186
- https://launchpad.net/bugs/cve/CVE-2024-26955
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26955
- https://nvd.nist.gov/vuln/detail/CVE-2024-26955
- https://security-tracker.debian.org/tracker/CVE-2024-26955
- https://ubuntu.com/security/CVE-2024-26955
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
- https://git.kernel.org/linus/269cdf353b5bdd15f1a079671b0f889113865f20
Frequently Asked Questions
What is the severity of CVE-2024-26955?
CVE-2024-26955 is considered a moderate severity vulnerability in the Linux kernel.
How do I fix CVE-2024-26955?
To fix CVE-2024-26955, update your Linux kernel to the patched 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-2024-26955?
CVE-2024-26955 affects the Linux kernel versions specified in the affected software list, particularly in Debian distributions.
What does CVE-2024-26955 exploit?
CVE-2024-26955 exploits inconsistent behavior in nilfs_get_block(), which can lead to kernel bugs during certain operations.
Is CVE-2024-26955 already resolved?
Yes, CVE-2024-26955 has been resolved with updates to the Linux kernel.
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