Improper resource shutdown or release in Linux kernel - CVE-2026-98140
Published: September 28, 2026
Vulnerability identifier: #VU152305
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-2026-98140
CWE-ID: CWE-404
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to corrupt kernel kmap_local mapping nesting.
The vulnerability exists due to improper resource management in write_mft_record_nolock() when handling error paths during MFT record writes. A local user can trigger an error while writing an MFT record to corrupt kernel kmap_local mapping nesting.
The issue occurs when pre_write_mst_fixup() or bio_add_folio() fails after the MFT record folio has been mapped.
Affected software
Linux kernel
How to mitigate CVE-2026-98140
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3