What’s Vulnerable › Vulnerabilities

CVE-2026-74358: ext4: fix fast commit wait/wake bit mapping on 64-bit

• 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: 2026-08-15 · updated 2026-08-17

Description

In the Linux kernel, the following vulnerability has been resolved: ext4: fix fast commit wait/wake bit mapping on 64-bit On 64-bit, ext4 dynamic inode states live in the upper half of i_flags, and ext4_test_inode_state() applies the corresponding +32 offset. The fast-commit wait and wake paths open-coded the wait key with the raw EXT4_STATE_* value. Add small helpers for the state wait word and bit, and use them for the FC_COMMITTING and FC_FLUSHING_DATA waits so the wait key follows the same mapping as the state helpers.

Affected products

• Linux kernel: 6.16 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/8b3bc93fee6771775243665a0cf31857d6659775
• https://git.kernel.org/stable/c/d06df6e447a8510f86db44b2522d5375362a9499
• https://git.kernel.org/stable/c/e82d515092a0cf2bca92f399d5c330c324879cea

Get alerted when CVE-2026-74358 or the next vulnerability affects your stack