CVE-2023-53091

Summary

In the Linux kernel, the following vulnerability has been resolved: ext4: update s_journal_inum if it changes after journal replay When mounting a crafted ext4 image, s_journal_inum may change after journal replay, which is obviously unreasonable because we have successfully loaded and replayed the journal through the old s_journal_inum. And the new s_journal_inum bypasses some of the checks in ext4_get_journal(), which may trigger a null pointer dereference problem. So if s_journal_inum changes after the journal replay, we ignore the change, and rewrite the current journal_inum to the superblock.

Impact & exploitability

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products we track (1)

Recommendation

Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.

Official patch: https://git.kernel.org/stable/c/3039d8b8692408438a618fac2776b629852663c3 ↗

Additional information

• NVD record
• https://git.kernel.org/stable/c/3039d8b8692408438a618fac2776b629852663c3Patch
• https://git.kernel.org/stable/c/499fef2030fb754c68b1c7cb3a799a3bc1d0d925Patch
• https://git.kernel.org/stable/c/70e66bdeae4d0f7c8e87762f425b68aedd5e8955Patch
• https://git.kernel.org/stable/c/ee0c5277d4fab920bd31345c49e193ecede9ecefPatch