Improper control of a resource through its lifetime in Linux kernel - CVE-2026-31463
Published: April 24, 2026
Vulnerability identifier: #VU127681
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-31463
CWE-ID: CWE-664
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper resource management in iomap_read_folio_iter() and iomap_read_end() when processing read I/O with a folio size that matches inode->i_blkbits but differs from the I/O granularity. A local user can trigger crafted read operations to cause a denial of service.
The issue occurs in the !ifs case where the current folio is not invalidated before read completion handling continues.
Affected software
Linux kernel
How to mitigate CVE-2026-31463
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3