vulnerability
Ubuntu: (CVE-2022-49762): linux vulnerability
Severity | CVSS | Published | Added | Modified |
---|---|---|---|---|
5 | (AV:L/AC:L/Au:S/C:N/I:N/A:C) | May 1, 2025 | May 6, 2025 | Jun 12, 2025 |
Description
In the Linux kernel, the following vulnerability has been resolved:
ntfs: check overflow when iterating ATTR_RECORDs
Kernel iterates over ATTR_RECORDs in mft record in ntfs_attr_find().
Because the ATTR_RECORDs are next to each other, kernel can get the next
ATTR_RECORD from end address of current ATTR_RECORD, through current
ATTR_RECORD length field.
The problem is that during iteration, when kernel calculates the end
address of current ATTR_RECORD, kernel may trigger an integer overflow bug
in executing `a = (ATTR_RECORD*)((u8*)a + le32_to_cpu(a->length))`. This
may wrap, leading to a forever iteration on 32bit systems.
This patch solves it by adding some checks on calculating end address
of current ATTR_RECORD during iteration.
Solution(s)
References
- CVE-2022-49762
- https://attackerkb.com/topics/CVE-2022-49762
- URL-https://git.kernel.org/linus/63095f4f3af59322bea984a6ae44337439348fe0
- URL-https://git.kernel.org/stable/c/45683723f6b53e39e8a4cec0894e61fd6ec71989
- URL-https://git.kernel.org/stable/c/5559eb5809353a83a40a1e4e7f066431c7b83020
- URL-https://git.kernel.org/stable/c/63095f4f3af59322bea984a6ae44337439348fe0
- URL-https://git.kernel.org/stable/c/785b2af9654b8beac55644e36da0085c5d776361
- URL-https://git.kernel.org/stable/c/86f36de14dce5802856bb7a5921d74439db00b64
- URL-https://git.kernel.org/stable/c/957732a09c3828267c2819d31c425aa793dd475b
- URL-https://git.kernel.org/stable/c/b612f924f296408d7d02fb4cd01218afd4ed7184
- URL-https://git.kernel.org/stable/c/b63ddb3ba61e2d3539f87e095c881e552bc45dab
- URL-https://www.cve.org/CVERecord?id=CVE-2022-49762

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