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CVE-2023-52600: jfs: fix uaf in jfs_evict_inode

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-03-06 · updated 2026-08-04
• Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: jfs: fix uaf in jfs_evict_inode When the execution of diMount(ipimap) fails, the object ipimap that has been released may be accessed in diFreeSpecial(). Asynchronous ipimap release occurs when rcu_core() calls jfs_free_node(). Therefore, when diMount(ipimap) fails, sbi->ipimap should not be initialized as ipimap.

Affected products

• Linux kernel: before 4.19.307; from 4.20 before 5.4.269; from 5.5 before 5.10.210; from 5.11 before 5.15.149; from 5.16 before 6.1.77; from 6.2 before 6.6.16 — fixed in 4.19.307, 5.10.210, 5.15.149, 5.4.269, 6.1.77, 6.6.16

How to fix

Upgrade to a fixed version: Linux kernel 4.19.307, 5.10.210, 5.15.149, 5.4.269. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1696d6d7d4a1b373e96428d0fe1166bd7c3c795e
• https://git.kernel.org/stable/c/32e8f2d95528d45828c613417cb2827d866cbdce
• https://git.kernel.org/stable/c/81b4249ef37297fb17ba102a524039a05c6c5d35
• https://git.kernel.org/stable/c/8e44dc3f96e903815dab1d74fff8faafdc6feb61
• https://git.kernel.org/stable/c/93df0a2a0b3cde2d7ab3a52ed46ea1d6d4aaba5f
• https://git.kernel.org/stable/c/bacdaa04251382d7efd4f09f9a0686bfcc297e2e
• https://git.kernel.org/stable/c/bc6ef64dbe71136f327d63b2b9071b828af2c2a8
• https://git.kernel.org/stable/c/e0e1958f4c365e380b17ccb35617345b31ef7bf3
• https://git.kernel.org/stable/c/1696d6d7d4a1b373e96428d0fe1166bd7c3c795e
• https://git.kernel.org/stable/c/32e8f2d95528d45828c613417cb2827d866cbdce
• https://git.kernel.org/stable/c/81b4249ef37297fb17ba102a524039a05c6c5d35
• https://git.kernel.org/stable/c/8e44dc3f96e903815dab1d74fff8faafdc6feb61

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