Out-of-bounds write in Linux kernel - CVE-2026-97415
Published: September 25, 2026
Vulnerability identifier: #VU152048
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-97415
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to perform an out-of-bounds write.
The vulnerability exists due to improper validation of root reference name lengths in Btrfs ROOT_REF and ROOT_BACKREF item handling when processing malformed Btrfs root reference items. A local user can invoke BTRFS_IOC_GET_SUBVOL_INFO on a filesystem containing a malformed ROOT_BACKREF item to perform an out-of-bounds write.
Affected software
Linux kernel
How to mitigate CVE-2026-97415
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3