CVE-2024-53131: nilfs2: fix null-ptr-deref in block_touch_buffer tracepoint
First published: Wed Dec 04 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix null-ptr-deref in block_touch_buffer tracepoint Patch series "nilfs2: fix null-ptr-deref bugs on block tracepoints". This series fixes null pointer dereference bugs that occur when using nilfs2 and two block-related tracepoints. This patch (of 2): It has been reported that when using "block:block_touch_buffer" tracepoint, touch_buffer() called from __nilfs_get_folio_block() causes a NULL pointer dereference, or a general protection fault when KASAN is enabled. This happens because since the tracepoint was added in touch_buffer(), it references the dev_t member bh->b_bdev->bd_dev regardless of whether the buffer head has a pointer to a block_device structure. In the current implementation, the block_device structure is set after the function returns to the caller. Here, touch_buffer() is used to mark the folio/page that owns the buffer head as accessed, but the common search helper for folio/page used by the caller function was optimized to mark the folio/page as accessed when it was reimplemented a long time ago, eliminating the need to call touch_buffer() here in the first place. So this solves the issue by eliminating the touch_buffer() call itself.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux kernel | >=3.9<6.1.119 | |
| Linux kernel | >=6.6.0<6.6.63 | |
| Linux kernel | >=6.11.0<6.11.10 | |
| Linux Kernel | >=3.9<6.1.119 | |
| Linux Kernel | >=6.6.0<6.6.63 | |
| Linux Kernel | >=6.11.0<6.11.10 | |
| debian/linux | <=5.10.223-1 | 5.10.234-1 6.1.129-1 6.1.128-1 6.12.20-1 6.12.21-1 |
| debian/linux-6.1 | 6.1.129-1~deb11u1 |
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Reference Links
- https://git.kernel.org/stable/c/085556bf8c70e2629e02e79268dac3016a08b8bf
- https://git.kernel.org/stable/c/6438f3f42cda825f6f59b4e45ac3a1da28a6f2c9
- https://git.kernel.org/stable/c/b017697a517f8779ada4e8ce1c2c75dbf60a2636
- https://git.kernel.org/stable/c/19c71cdd77973f99a9adc3190130bc3aa7ae5423
- https://git.kernel.org/stable/c/3b2a4fd9bbee77afdd3ed5a05a0c02b6cde8d3b9
- https://git.kernel.org/stable/c/59b49ca67cca7b007a5afd3de0283c8008157665
- https://git.kernel.org/stable/c/77e47f89d32c2d72eb33d0becbce7abe14d061f4
- https://git.kernel.org/stable/c/cd45e963e44b0f10d90b9e6c0e8b4f47f3c92471
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-53131
- https://nvd.nist.gov/vuln/detail/CVE-2024-53131
- https://launchpad.net/bugs/cve/CVE-2024-53131
- https://security-tracker.debian.org/tracker/CVE-2024-53131
- https://ubuntu.com/security/CVE-2024-53131
- https://git.kernel.org/linus/cd45e963e44b0f10d90b9e6c0e8b4f47f3c92471
Frequently Asked Questions
What is the severity of CVE-2024-53131?
CVE-2024-53131 has a severity rating that indicates it can lead to null pointer dereference vulnerabilities in the Linux kernel.
How do I fix CVE-2024-53131?
To fix CVE-2024-53131, you should update your Linux kernel to a version that includes the patches, such as 6.1.123-1 or newer.
Which versions of the Linux kernel are affected by CVE-2024-53131?
CVE-2024-53131 affects versions from 3.9 to 6.1.119, 6.6.0 to 6.6.63, and 6.11.0 to 6.11.10.
What component of Linux is impacted by CVE-2024-53131?
CVE-2024-53131 impacts the nilfs2 file system within the Linux kernel.
Can CVE-2024-53131 cause system crashes?
Yes, CVE-2024-53131 can result in null pointer dereference which may lead to system crashes or instability.
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