CVE-2022-49762
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().
Does this matter?
Lower severity and a low EPSS score (0.21%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.21% probability · 11th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/45683723f6b53e39e8a4cec0894e61fd6ec71989Patch
- https://git.kernel.org/stable/c/5559eb5809353a83a40a1e4e7f066431c7b83020Patch
- https://git.kernel.org/stable/c/63095f4f3af59322bea984a6ae44337439348fe0Patch
- https://git.kernel.org/stable/c/785b2af9654b8beac55644e36da0085c5d776361Patch
- https://git.kernel.org/stable/c/86f36de14dce5802856bb7a5921d74439db00b64Patch
- https://git.kernel.org/stable/c/957732a09c3828267c2819d31c425aa793dd475bPatch
- https://git.kernel.org/stable/c/b612f924f296408d7d02fb4cd01218afd4ed7184Patch
- https://git.kernel.org/stable/c/b63ddb3ba61e2d3539f87e095c881e552bc45dabPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.