NULL pointer dereference in libfuse - CVE-2026-33179
Published: April 25, 2026
Vulnerability identifier: #VU127890
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-33179
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: libfuse
Affected software:
libfuse
libfuse
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to null pointer dereference in fuse_uring_init_queue when initializing io_uring queue entries after NUMA allocation failure. A local user can trigger allocation failure conditions to cause a denial of service.
Only the io_uring transport is affected; the traditional /dev/fuse path is not affected.
How to mitigate CVE-2026-33179
Install security update from vendor's website.