CVE-2024-53131

Published Dec 4, 2024

Last updated 7 months ago

CVSS medium 5.5

Overview

Description
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.
Source
416baaa9-dc9f-4396-8d5f-8c081fb06d67
NVD status
Modified
Products
linux_kernel

Risk scores

CVSS 3.1

Type
Primary
Base score
5.5
Impact score
3.6
Exploitability score
1.8
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Severity
MEDIUM

Weaknesses

nvd@nist.gov
CWE-476

Social media

Hype score
Not currently trending

  1. 🔵 #Linux Kernel, Null Pointer Dereference, #CVE-2024-53131 (Low) https://t.co/GXyI6IOuiS

    @dailycve

    11 Dec 2024

    24 Impressions

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  2. CVE-2024-53131 Null Pointer Dereference in Linux Kernel nilfs2 Tracepoint Fixed In the Linux kernel, there was a problem with the nilfs2 system. It was fixed because it caused errors in block tracepoints. The pro... https://t.co/uEVsPxapjl

    @VulmonFeeds

    5 Dec 2024

    11 Impressions

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  3. CVE-2024-53131 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-d… https://t.co/LpOBEeznxI

    @CVEnew

    4 Dec 2024

    308 Impressions

    0 Retweets

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Configurations

Related CVEs

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References

Sources include official advisories and independent security research.