CVE-2026-72225

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-72225

Key Details

CVE	CVE-2026-72225
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

In the Linux kernel, the following vulnerability has been resolved:

jbd2: fix integer underflow in jbd2_journal_initialize_fast_commit()

jbd2_journal_initialize_fast_commit() validates journal capacity by

checking (journal->j_last - num_fc_blks < JBD2_MIN_JOURNAL_BLOCKS).

Both j_last and num_fc_blks are unsigned, so when num_fc_blks exceeds

j_last the subtraction wraps to a large value, bypassing the bounds

check.

The resulting underflow corrupts j_last, j_fc_first, and j_free,

leading to journal abort.

Fix by checking num_fc_blks against j_last before the subtraction,

returning -EFSCORRUPTED. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-72225
CVE	https://www.cve.org/CVERecord?id=CVE-2026-72225

Source

Reference

NVD

CVE