Nixpkgs security tracker
NIXPKGS-2026-0730
GitHub issue
published 3 months ago
Permalink
CVE-2026-33179
5.5 MEDIUM
- CVSS version (CVSS): 3.1
- Attack Vector (AV): Local (L)
- Attack Complexity (AC): Low (L)
- Privileges Required (PR): Low (L)
- User Interaction (UI): None (N)
- Scope (S): Unchanged (U)
- Confidentiality (C): None (N)
- Integrity (I): None (N)
- Availability (A): High (H)
- Modified Attack Vector (MAV): Local (L)
- Modified Attack Complexity (MAC): Low (L)
- Modified Privileges Required (MPR): Low (L)
- Modified User Interaction (MUI): None (N)
- Modified Confidentiality (MC): None (N)
- Modified Scope (MS): Unchanged (U)
- Modified Integrity (MI): None (N)
- Modified Availability (MA): High (H)
by @LeSuisse Activity log
- Created suggestion
- @LeSuisse ignored package haskellPackages.libfuse3
- @LeSuisse accepted
- @LeSuisse published on GitHub
libfuse: NULL Pointer Dereference and Memory Leak in io_uring Queue Initialization
libfuse is the reference implementation of the Linux FUSE. From version 3.18.0 to before version 3.18.2, a NULL pointer dereference and memory leak in fuse_uring_init_queue allows a local user to crash the FUSE daemon or cause resource exhaustion. When numa_alloc_local fails during io_uring queue entry setup, the code proceeds with NULL pointers. When fuse_uring_register_queue fails, NUMA allocations are leaked and the function incorrectly returns success. Only the io_uring transport is affected; the traditional /dev/fuse path is not affected. PoC confirmed with AddressSanitizer/LeakSanitizer. This issue has been patched in version 3.18.2.
References
-
https://github.com/libfuse/libfuse/security/advisories/GHSA-x669-v3mq-r358 x_refsource_CONFIRM
-
https://github.com/libfuse/libfuse/releases/tag/fuse-3.18.2 x_refsource_MISC
Affected products
libfuse
- ==>= 3.18.0, < 3.18.2
Ignored packages (1)
pkgs.haskellPackages.libfuse3
A Haskell binding for libfuse-3.x