In the Linux kernel, the following vulnerability has been resolved:
jfs: fix null ptr deref in dtInsertEntry
[syzbot reported]
general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 PID: 5061 Comm: syz-executor404 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:dtInsertEntry+0xd0c/0x1780 fs/jfs/jfs_dtree.c:3713
...
[Analyze]
In dtInsertEntry(), when the pointer h has the same value as p, after writing
name in UniStrncpy_to_le(), p->header.flag will be cleared. This will cause the
previously true judgment "p->header.flag & BT-LEAF" to change to no after writing
the name operation, this leads to entering an incorrect branch and accessing the
uninitialized object ih when judging this condition for the second time.
[Fix]
After got the page, check freelist first, if freelist == 0 then exit dtInsert()
and return -EINVAL.
References
Configurations
Configuration 1 (hide)
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History
12 Sep 2024, 20:58
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| CWE | CWE-476 | |
| References | () https://git.kernel.org/stable/c/53023ab11836ac56fd75f7a71ec1356e50920fa9 - Patch | |
| References | () https://git.kernel.org/stable/c/6ea10dbb1e6c58384136e9adfd75f81951e423f6 - Patch | |
| References | () https://git.kernel.org/stable/c/9c2ac38530d1a3ee558834dfa16c85a40fd0e702 - Patch | |
| References | () https://git.kernel.org/stable/c/ce6dede912f064a855acf6f04a04cbb2c25b8c8c - Patch | |
| First Time |
Linux linux Kernel
Linux |
29 Aug 2024, 17:15
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
|
| Summary |
|
26 Aug 2024, 12:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2024-08-26 12:15
Updated : 2024-09-12 20:58
NVD link : CVE-2024-44939
Mitre link : CVE-2024-44939
CVE.ORG link : CVE-2024-44939
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-476
NULL Pointer Dereference