Bug 2396535 (CVE-2023-53420) - CVE-2023-53420 kernel: ntfs: Fix panic about slab-out-of-bounds caused by ntfs_listxattr()
Summary: CVE-2023-53420 kernel: ntfs: Fix panic about slab-out-of-bounds caused by ntf...
Keywords:
Status: NEW
Alias: CVE-2023-53420
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-09-18 17:03 UTC by OSIDB Bzimport
Modified: 2025-11-26 11:06 UTC (History)
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Description OSIDB Bzimport 2025-09-18 17:03:53 UTC
In the Linux kernel, the following vulnerability has been resolved:

ntfs: Fix panic about slab-out-of-bounds caused by ntfs_listxattr()

Here is a BUG report from syzbot:

BUG: KASAN: slab-out-of-bounds in ntfs_list_ea fs/ntfs3/xattr.c:191 [inline]
BUG: KASAN: slab-out-of-bounds in ntfs_listxattr+0x401/0x570 fs/ntfs3/xattr.c:710
Read of size 1 at addr ffff888021acaf3d by task syz-executor128/3632

Call Trace:
 ntfs_list_ea fs/ntfs3/xattr.c:191 [inline]
 ntfs_listxattr+0x401/0x570 fs/ntfs3/xattr.c:710
 vfs_listxattr fs/xattr.c:457 [inline]
 listxattr+0x293/0x2d0 fs/xattr.c:804

Fix the logic of ea_all iteration. When the ea->name_len is 0,
return immediately, or Add2Ptr() would visit invalid memory
in the next loop.

[almaz.alexandrovich: lines of the patch have changed]


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