What’s Vulnerable › Vulnerabilities

CVE-2023-53766: FS: JFS: Check for read-only mounted filesystem in txBegin

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-08 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: FS: JFS: Check for read-only mounted filesystem in txBegin This patch adds a check for read-only mounted filesystem in txBegin before starting a transaction potentially saving from NULL pointer deref.

Affected products

• Linux kernel: 2.6.12 — fixed in 6.5

How to fix

Upgrade to a fixed version: Linux kernel 6.5. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2a8807f9f511c64de0c7cc9900a1683e3d72a3e5
• https://git.kernel.org/stable/c/2febd5f81e4bfba61d9f374dcca628aff374cc56
• https://git.kernel.org/stable/c/5c094ca994824e038b6a97835ded4e5d1d808504
• https://git.kernel.org/stable/c/95e2b352c03b0a86c5717ba1d24ea20969abcacc
• https://git.kernel.org/stable/c/97c1f26e4d4af55e8584e4646dd5c5fa7baf62c7
• https://git.kernel.org/stable/c/a88efca805bea93cea9187dfd00835aa7093bf1b
• https://git.kernel.org/stable/c/aa7cdf487ab3fa47284daaccc3d7d5de01c6a84c
• https://git.kernel.org/stable/c/b0ed8ed0428ee96092da6fefa5cfacbe4abed701

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