CVE-2026-45252

תיאור (מקור, אנגלית)

When a fusefs file system implements extended attributes, the kernel may send a FUSE_LISTXATTR message to the userspace daemon to retrieve the list of extended attributes for a given file. The FUSE protocol requires the daemon to return a packed list of NUL-terminated strings. The fusefs kernel module calls strlen() on this daemon-supplied buffer without first verifying that the entire list is NUL-terminated. If a malicious daemon sends a non-NUL-terminated list, the fusefs kernel module may read beyond the end of one heap-allocated buffer and potentially write beyond the end of a second buffer. A malicious daemon could disclose up to 253 bytes of kernel heap memory, or it could inject up to 250 attacker-controlled bytes into unallocated kernel heap space.

מדדים

CVSS 3.1

5.5 (MEDIUM) מקור הציון: CNA CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H

EPSS — סבירות ניצול

0% (אחוזון 000) נכון ל-1/10/2026

CWE

CWE-122

מוצרים מושפעים

freebsd: freebsd

קישורים

• https://security.freebsd.org/advisories/FreeBSD-SA-26:20.fusefs.asc Vendor Advisory