CVE-2022-49642 [Medium] | Integer Overflow in Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: dwc-qos: Disable split header for Tegra194 There is a long-standing issue with the Synopsys DWC Ethernet driver for Tegra194 where random system crashes have been observed [0]. The problem occurs when the split header feature is enabled in the stmmac driver. In the bad case, a larger than expected buffer length is received and causes the calculation of the total buffer length to overflow. This results in a very large buffer length that causes the kernel to crash. Why this larger buffer length is received is not clear, however, the feedback from the NVIDIA design team is that the split header feature is not supported for Tegra194. Therefore, disable split header support for Tegra194 to prevent these random crashes from occurring. [0] https://lore.kernel.org/linux-tegra/[email protected]/

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.14%	0.24%	+0.10%
2	2026-04-06	0.03%	0.14%	+0.10%
3	2026-03-21	—	0.03%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.14%

0.24%

+0.10%

2026-04-06

0.03%

0.14%

+0.10%

2026-03-21

—

0.03%

—

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-2022-49642

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2022-49642 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-2022-49642
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2022-49642
`suse`	medium	—	https://www.suse.com/security/cve/CVE-2022-49642/
`ubuntu`	medium	CVE-2022-49642 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, ignored 146, released 135, not-affected 124, needs-triage 1.	https://ubuntu.com/security/CVE-2022-49642

Affected software / configurations for CVE-2022-49642

Vendor	Product	Version	Raw CPE
linux	linux_kernel	>= 5.4, < 5.4.207	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.5, < 5.10.132	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.11, < 5.15.56	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.16, < 5.18.13	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	5.19	cpe:2.3:o:linux:linux_kernel:5.19:rc1::::::
linux	linux_kernel	5.19	cpe:2.3:o:linux:linux_kernel:5.19:rc2::::::
linux	linux_kernel	5.19	cpe:2.3:o:linux:linux_kernel:5.19:rc3::::::
linux	linux_kernel	5.19	cpe:2.3:o:linux:linux_kernel:5.19:rc4::::::
linux	linux_kernel	5.19	cpe:2.3:o:linux:linux_kernel:5.19:rc5::::::
linux	linux_kernel	5.19	cpe:2.3:o:linux:linux_kernel:5.19:rc6::::::

References for CVE-2022-49642

URL	Tags
https://git.kernel.org/stable/c/029c1c2059e9c4b38f97a06204cdecd10cfbeb8a	Patch
https://git.kernel.org/stable/c/2968830c9b47ce093237483c6207c61065712386	Patch
https://git.kernel.org/stable/c/9cc8edc571b871d974b3289868553f9ce544aba6	Patch
https://git.kernel.org/stable/c/cfa4caf3e881ad6dd366c903c34f1c7f21b857ab	Patch
https://git.kernel.org/stable/c/d5c315a787652c35045044877a249f7d5c8a4104	Patch

URL

CVE-2022-49642 | net: stmmac: dwc-qos: Disable split header for Tegra194

Exploit prediction scoring system (EPSS) score for CVE-2022-49642

Common vulnerability scoring system (CVSS) metrics for CVE-2022-49642

Weakness enumeration for CVE-2022-49642

OS Trackers for CVE-2022-49642

Affected software / configurations for CVE-2022-49642

References for CVE-2022-49642