CVE-2022-49762 [Medium] | Integer Overflow in Linux Kernel

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.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-11-07	0.07%	0.02%	-0.05%
2	2025-07-01	0.02%	0.07%	+0.05%
3	2025-05-02	—	0.02%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2025-11-07

0.07%

0.02%

-0.05%

2025-07-01

0.02%

0.07%

+0.05%

2025-05-02

—

0.02%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
5.5	3.1	MEDIUM	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	1.8	3.6	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

5.5

3.1

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand

Attack vector (AV:L): They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

1.8

3.6

[email protected]

OS Trackers for CVE-2022-49762

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2022-49762 not yet assigned priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2022-49762
`redhat`	—	—	https://access.redhat.com/security/cve/CVE-2022-49762
`suse`	medium	—	https://www.suse.com/security/cve/CVE-2022-49762/
`ubuntu`	medium	CVE-2022-49762 medium priority: Ubuntu including 158 source packages (linux, linux-allwinner-5.19, …), 1551 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 1145, released 154, ignored 149, not-affected 97, needed 5, needs-triage 1.	https://ubuntu.com/security/CVE-2022-49762

Affected software / configurations for CVE-2022-49762

Vendor	Product	Version	Raw CPE
linux	linux_kernel	< 4.9.334	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.10, < 4.14.300	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.15, < 4.19.267	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.20, < 5.4.225	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.5, < 5.10.156	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.11, < 5.15.80	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.16, < 6.0.10	cpe:2.3:o:linux:linux_kernel::::::::

References for CVE-2022-49762

URL	Tags
https://git.kernel.org/stable/c/45683723f6b53e39e8a4cec0894e61fd6ec71989	Patch
https://git.kernel.org/stable/c/5559eb5809353a83a40a1e4e7f066431c7b83020	Patch
https://git.kernel.org/stable/c/63095f4f3af59322bea984a6ae44337439348fe0	Patch
https://git.kernel.org/stable/c/785b2af9654b8beac55644e36da0085c5d776361	Patch
https://git.kernel.org/stable/c/86f36de14dce5802856bb7a5921d74439db00b64	Patch
https://git.kernel.org/stable/c/957732a09c3828267c2819d31c425aa793dd475b	Patch
https://git.kernel.org/stable/c/b612f924f296408d7d02fb4cd01218afd4ed7184	Patch
https://git.kernel.org/stable/c/b63ddb3ba61e2d3539f87e095c881e552bc45dab	Patch

URL

CVE-2022-49762 | ntfs: check overflow when iterating ATTR_RECORDs

Exploit prediction scoring system (EPSS) score for CVE-2022-49762

Common vulnerability scoring system (CVSS) metrics for CVE-2022-49762

Weakness enumeration for CVE-2022-49762

OS Trackers for CVE-2022-49762

Affected software / configurations for CVE-2022-49762

References for CVE-2022-49762