In the Linux kernel, the following vulnerability has been resolved:
nilfs2: fix potential out-of-bounds memory access in nilfs_find_entry()
Syzbot reported that when searching for records in a directory where the
inode's i_size is corrupted and has a large value, memory access outside
the folio/page range may occur, or a use-after-free bug may be detected if
KASAN is enabled.
This is because nilfs_last_byte(), which is called by nilfs_find_entry()
and others to calculate the number of valid bytes of directory data in a
page from i_size and the page index, loses the upper 32 bits of the 64-bit
size information due to an inappropriate type of local variable to which
the i_size value is assigned.
This caused a large byte offset value due to underflow in the end address
calculation in the calling nilfs_find_entry(), resulting in memory access
that exceeds the folio/page size.
Fix this issue by changing the type of the local variable causing the bit
loss from "unsigned int" to "u64". The return value of nilfs_last_byte()
is also of type "unsigned int", but it is truncated so as not to exceed
PAGE_SIZE and no bit loss occurs, so no change is required.
CVSS
No CVSS.
References
Configurations
Configuration 1 (hide)
|
History
24 Mar 2025, 17:32
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux linux Kernel
Linux |
|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:* |
|
| References | () https://git.kernel.org/stable/c/09d6d05579fd46e61abf6e457bb100ff11f3a9d3 - Patch | |
| References | () https://git.kernel.org/stable/c/985ebec4ab0a28bb5910c3b1481a40fbf7f9e61d - Patch | |
| References | () https://git.kernel.org/stable/c/31f7b57a77d4c82a34ddcb6ff35b5aa577ef153e - Patch | |
| References | () https://git.kernel.org/stable/c/48eb6e7404948032bbe811c5affbe39f6b316951 - Patch | |
| References | () https://git.kernel.org/stable/c/e3732102a9d638d8627d14fdf7b208462f0520e0 - Patch | |
| References | () https://git.kernel.org/stable/c/c3afea07477baccdbdec4483f8d5e59d42a3f67f - Patch | |
| References | () https://git.kernel.org/stable/c/5af8366625182f01f6d8465c9a3210574673af57 - Patch |
27 Dec 2024, 15:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2024-12-27 15:15
Updated : 2025-03-24 17:32
NVD link : CVE-2024-56619
Mitre link : CVE-2024-56619
JSON object : View
Products Affected
linux
- linux_kernel
CWE
No CWE.