Vulnerabilities > CVE-2024-49900 - Use of Uninitialized Resource vulnerability in Linux Kernel
Attack vector
LOCAL Attack complexity
LOW Privileges required
LOW Confidentiality impact
HIGH Integrity impact
NONE Availability impact
HIGH Summary
In the Linux kernel, the following vulnerability has been resolved: jfs: Fix uninit-value access of new_ea in ea_buffer syzbot reports that lzo1x_1_do_compress is using uninit-value: ===================================================== BUG: KMSAN: uninit-value in lzo1x_1_do_compress+0x19f9/0x2510 lib/lzo/lzo1x_compress.c:178 ... Uninit was stored to memory at: ea_put fs/jfs/xattr.c:639 [inline] ... Local variable ea_buf created at: __jfs_setxattr+0x5d/0x1ae0 fs/jfs/xattr.c:662 __jfs_xattr_set+0xe6/0x1f0 fs/jfs/xattr.c:934 ===================================================== The reason is ea_buf->new_ea is not initialized properly. Fix this by using memset to empty its content at the beginning in ea_get().
Vulnerable Configurations
Common Weakness Enumeration (CWE)
References
- https://git.kernel.org/stable/c/8b1dcf25c26d42e4a68c4725ce52a0543c7878cc
- https://git.kernel.org/stable/c/d7444f91a9f93eaa48827087ed0f3381c194181d
- https://git.kernel.org/stable/c/6041536d18c5f51a84bc37cd568cbab61870031e
- https://git.kernel.org/stable/c/c076b3746224982eebdba5c9e4b1467e146c0d64
- https://git.kernel.org/stable/c/7c244d5b48284a770d96ff703df2dfeadf804a73
- https://git.kernel.org/stable/c/8ad8b531de79c348bcb8133e7f5e827b884226af
- https://git.kernel.org/stable/c/2b59ffad47db1c46af25ccad157bb3b25147c35c