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CVE-2023-52804

Disclosure Date: May 21, 2024 •
CVE-2023-52804
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Description

In the Linux kernel, the following vulnerability has been resolved:

fs/jfs: Add validity check for db_maxag and db_agpref

Both db_maxag and db_agpref are used as the index of the
db_agfree array, but there is currently no validity check for
db_maxag and db_agpref, which can lead to errors.

The following is related bug reported by Syzbot:

UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dmap.c:639:20
index 7936 is out of range for type ‘atomic_t[128]’

Add checking that the values of db_maxag and db_agpref are valid
indexes for the db_agfree array.

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CVSS V3 Severity and Metrics
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Impact Score:
Unknown
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Attack Vector (AV):
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Attack Complexity (AC):
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Integrity (I):
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Availability (A):
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General Information

Offensive Application
Unknown
Utility Class
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Ports
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OS
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Vulnerable Versions
Linux a0649e2dd4a3
Linux not down converted
Prerequisites
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Discovered By
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PoC Author
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Metasploit Module
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Reporter
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Vendors

  • Linux

Products

  • Linux
Technical Analysis