CVE-2025-22049 [Medium] | Security Vulnerability in Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: LoongArch: Increase ARCH_DMA_MINALIGN up to 16 ARCH_DMA_MINALIGN is 1 by default, but some LoongArch-specific devices (such as APBDMA) require 16 bytes alignment. When the data buffer length is too small, the hardware may make an error writing cacheline. Thus, it is dangerous to allocate a small memory buffer for DMA. It's always safe to define ARCH_DMA_MINALIGN as L1_CACHE_BYTES but unnecessary (kmalloc() need small memory objects). Therefore, just increase it to 16.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-05	0.08%	0.02%	-0.06%
2	2026-02-10	0.02%	0.08%	+0.06%
3	2025-11-01	—	0.02%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-05

0.08%

0.02%

-0.06%

2026-02-10

0.02%

0.08%

+0.06%

2025-11-01

—

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-2025-22049

vendor	priority	summary	link
`debian`	unimportant	CVE-2025-22049 unimportant priority: Debian including 2 source packages (linux, linux-6.1), 6 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 6.	https://security-tracker.debian.org/tracker/CVE-2025-22049
`redhat`	—	—	https://access.redhat.com/security/cve/CVE-2025-22049
`suse`	medium	CVE-2025-22049 severity moderate: SUSE including 26 source package names (cluster-md-kmp-default, dlm-kmp-default, …), 239 product×package rows across 44 product lines (SLES-LTSS-TERADATA 15 SP2, SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS, … (44 product lines)): Known Not Affected 239.	https://www.suse.com/security/cve/CVE-2025-22049/
`ubuntu`	medium	CVE-2025-22049 medium priority: Ubuntu including 150 source packages (linux, linux-allwinner-5.19, …), 1483 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 1093, ignored 156, not-affected 144, released 90.	https://ubuntu.com/security/CVE-2025-22049

Affected software / configurations for CVE-2025-22049

Vendor	Product	Version	Raw CPE
linux	linux_kernel	>= 5.19, < 6.1.134	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.2, < 6.6.87	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.7, < 6.12.23	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.13, < 6.13.11	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.14, < 6.14.2	cpe:2.3:o:linux:linux_kernel::::::::

References for CVE-2025-22049

URL	Tags
https://git.kernel.org/stable/c/1d0def2d1658666ec1f32c9495df60e7411e3c82	Patch
https://git.kernel.org/stable/c/279ec25c2df49fba1cd9488f2ddd045d9cb2112e	Patch
https://git.kernel.org/stable/c/4103cfe9dcb88010ae4911d3ff417457d1b6a720	Patch
https://git.kernel.org/stable/c/8b82aea3666f8f2c78f86148d78aea99c46e0f82	Patch
https://git.kernel.org/stable/c/bfff341cac7c650e6ca8d10503725992f5564d0f	Patch
https://git.kernel.org/stable/c/f39af67f03b564b763b06e44cb960c10a382d54a	Patch
https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html

URL

CVE-2025-22049 | LoongArch: Increase ARCH_DMA_MINALIGN up to 16

Exploit prediction scoring system (EPSS) score for CVE-2025-22049

Common vulnerability scoring system (CVSS) metrics for CVE-2025-22049

Weakness enumeration for CVE-2025-22049

OS Trackers for CVE-2025-22049

Affected software / configurations for CVE-2025-22049

References for CVE-2025-22049