CVE-2023-53091

ext4: update s_journal_inum if it changes after journal replay

Description

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.

N/A

CVSS

Severity:

EPSS 0.02%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/499fef2030fb754c68b1c7cb3a799a3bc1d0d925
https://git.kernel.org/stable/c/70e66bdeae4d0f7c8e87762f425b68aedd5e8955
https://git.kernel.org/stable/c/ee0c5277d4fab920bd31345c49e193ecede9ecef
https://git.kernel.org/stable/c/3039d8b8692408438a618fac2776b629852663c3

Frequently Asked Questions

What is the severity of CVE-2023-53091?: CVE-2023-53091 has not yet been assigned a CVSS score.
How to fix CVE-2023-53091?: To fix CVE-2023-53091, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-53091 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2023-53091 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-53091?: CVE-2023-53091 affects Linux Linux, Linux Linux.

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