High 7.8Published Oct 1, 2025

CVE-2023-53473ext4: improve error handling from ext4_dirhash()

Updated under an hour ago (Oct 26, 2026, 5:40 PM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: ext4: improve error handling from ext4_dirhash() The ext4_dirhash() will *almost* never fail, especially when the hash tree feature was first introduced. However, with the addition of support of encrypted, casefolded file names, that function can most certainly fail today. So make sure the callers of ext4_dirhash() properly check for failures, and reflect the errors back up to their callers.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 15, 2026
First seen by InfoSec Signals: Oct 15, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from b886ee3e778ec2ad43e276fd378ab492cf6819b7 before b2531936118deb3f479c4fa1bcd787b74b8faa6a; from b886ee3e778ec2ad43e276fd378ab492cf6819b7 before f68876aeef96ef8b708ab10b9cb47ce0a5adb424; from b886ee3e778ec2ad43e276fd378ab492cf6819b7 before 70d579aefa652a06af97e013e3fbbabbe5a43553; from b886ee3e778ec2ad43e276fd378ab492cf6819b7 before c1fae027da61fe8e7eb99f7244297e81bc0f1e43; from b886ee3e778ec2ad43e276fd378ab492cf6819b7 before 4b3cb1d108bfc2aebb0d7c8a52261a53cf7f5786	CNA record
linux linux_kernel linux:linux_kernel	from 5.2 before 5.15.112; from 5.16 before 6.1.29; from 6.2 before 6.2.16; from 6.3 before 6.3.3; 6.4	NVD

References

References

https://git.kernel.org/stable/c/b2531936118deb3f479c4fa1bcd787b74b8faa6a	patch
https://git.kernel.org/stable/c/f68876aeef96ef8b708ab10b9cb47ce0a5adb424	patch
https://git.kernel.org/stable/c/70d579aefa652a06af97e013e3fbbabbe5a43553	patch
https://git.kernel.org/stable/c/c1fae027da61fe8e7eb99f7244297e81bc0f1e43	patch
https://git.kernel.org/stable/c/4b3cb1d108bfc2aebb0d7c8a52261a53cf7f5786	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.