An issue was discovered in the Linux kernel through 6.4.2. A crafted UDF filesystem image causes a use-after-free write operation in the udf_put_super and udf_close_lvid functions in fs/udf/super.c. NOTE: the suse.com reference has a different perspective about this.
Weakness
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Linux_kernel | Linux | * | 6.4.2 (including) |
Potential Mitigations
References
- https://bugzilla.suse.com/show_bug.cgi?id=CVE-2023-37454
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6f861765464f43a71462d52026fbddfc858239a5
- https://lore.kernel.org/all/00000000000056e02f05dfb6e11a%40google.com/T/
- https://syzkaller.appspot.com/bug?extid=26873a72980f8fa8bc55
- https://syzkaller.appspot.com/bug?extid=60864ed35b1073540d57
- https://syzkaller.appspot.com/bug?extid=61564e5023b7229ec85d
- https://bugzilla.suse.com/show_bug.cgi?id=CVE-2023-37454
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6f861765464f43a71462d52026fbddfc858239a5
- https://lore.kernel.org/all/00000000000056e02f05dfb6e11a%40google.com/T/
- https://syzkaller.appspot.com/bug?extid=26873a72980f8fa8bc55
- https://syzkaller.appspot.com/bug?extid=60864ed35b1073540d57
- https://syzkaller.appspot.com/bug?extid=61564e5023b7229ec85d