Answer in brief
CVE-2026-53041 records a High severity (CVSS 7.1) vulnerability in ocfs2: fix listxattr handling when the buffer is full. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=936b8834366ec05f2a6993f73afd8348cac9718e <a35a1c2b170b5b578b1b3fecb95694796552af9a || >=936b8834366ec05f2a6993f73afd8348cac9718e <2323084c17370304f49c84b354fe7b3edbb264fe || >=936b8834366ec05f2a6993f73afd8348cac9718e <6f702b00b8124c5d3525f19172934544826a114d || >=936b8834366ec05f2a6993f73afd8348cac9718e <d919b905939eda93393e3572900ff70dbad2b47f || >=936b8834366ec05f2a6993f73afd8348cac9718e <46e66fefb83811958127bc9ad736983ec629d82b || >=936b8834366ec05f2a6993f73afd8348cac9718e <2685df8577a38d83b367c8cf52eda9dc286959ff || >=936b8834366ec05f2a6993f73afd8348cac9718e <50033ec1350fe68abdc63b950ced7ae57364b77a || >=936b8834366ec05f2a6993f73afd8348cac9718e <d12f558e6200b3f47dbef9331ed6d115d2410e59 | a35a1c2b170b5b578b1b3fecb95694796552af9a, 2323084c17370304f49c84b354fe7b3edbb264fe, 6f702b00b8124c5d3525f19172934544826a114d, d919b905939eda93393e3572900ff70dbad2b47f, 46e66fefb83811958127bc9ad736983ec629d82b, 2685df8577a38d83b367c8cf52eda9dc286959ff, 50033ec1350fe68abdc63b950ced7ae57364b77a, d12f558e6200b3f47dbef9331ed6d115d2410e59 |
| Linux/Linuxgeneric | 2.6.28 | Not reported |
Published upstream
Jun 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 24, 2026
In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix listxattr handling when the buffer is full [BUG] If an OCFS2 inode has both inline and block-based xattrs, listxattr() can return a size larger than the caller's buffer when the inline names consume that buffer exactly. kernel BUG at mm/usercopy.c:102! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI RIP: 0010:usercopy_abort+0xb7/0xd0 mm/usercopy.c:102 Call Trace: __check_heap_object+0xe3/0x120 mm/slub.c:8243 check_heap_object mm/usercopy.c:196 [inline] __check_object_size mm/usercopy.c:250 [inline] __check_object_size+0x5c5/0x780 mm/usercopy.c:215 check_object_size include/linux/ucopysize.h:22 [inline] check_copy_size include/linux/ucopysize.h:59 [inline] copy_to_user include/linux/uaccess.h:219 [inline] listxattr+0xb0/0x170 fs/xattr.c:926 filename_listxattr fs/xattr.c:958 [inline] path_listxattrat+0x137/0x320 fs/xattr.c:988 __do_sys_listxattr fs/xattr.c:1001 [inline] __se_sys_listxattr fs/xattr.c:998 [inline] __x64_sys_listxattr+0x7f/0xd0 fs/xattr.c:998 ... [CAUSE] Commit 936b8834366e ("ocfs2: Refactor xattr list and remove ocfs2_xattr_handler().") replaced the old per-handler list accounting with ocfs2_xattr_list_entry(), but it kept using size == 0 to detect probe mode. That assumption stops being true once ocfs2_listxattr() finishes the inline-xattr pass. If the inline names fill the caller buffer exactly, the block-xattr pass runs with a non-NULL buffer and a remaining size of zero. ocfs2_xattr_list_entry() then skips the bounds check, keeps counting block names, and returns a positive size larger than the supplied buffer. [FIX] Detect probe mode by testing whether the destination buffer pointer is NULL instead of whether the remaining size is zero. That restores the pre-refactor behavior and matches the OCFS2 getxattr helpers. Once the remaining buffer reaches zero while more names are left, the block-xattr pass now returns -ERANGE instead of reporting a size larger than the allocated list buffer.
Quoted source text, attributed separately from HOL analysis.