CVE-2025-38138 [Medium] | Security Vulnerability in Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: dmaengine: ti: Add NULL check in udma_probe() devm_kasprintf() returns NULL when memory allocation fails. Currently, udma_probe() does not check for this case, which results in a NULL pointer dereference. Add NULL check after devm_kasprintf() to prevent this issue.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-04-29	0.05%	0.16%	+0.11%
2	2026-03-19	0.03%	0.05%	+0.02%
3	2025-12-18	—	0.03%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-04-29

0.05%

0.16%

+0.11%

2026-03-19

0.03%

0.05%

+0.02%

2025-12-18

—

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-2025-38138

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2025-38138 not yet assigned 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-2025-38138
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2025-38138
`suse`	medium	CVE-2025-38138 severity moderate: SUSE including 475 source package names (2.1.3-6.67:kernel-default-base-6.4.0-32.1.21.10, 2.1.3-7.44:kernel-default-6.4.0-32.1, …), 997 product×package rows across 197 product lines (Container suse/sl-micro/6.0/base-os-container, Container suse/sl-micro/6.0/kvm-os-container, … (197 product lines)): Fixed 627, Known Affected 231, Known Not Affected 118, First Fixed 21.	https://www.suse.com/security/cve/CVE-2025-38138/
`ubuntu`	medium	CVE-2025-38138 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 169, ignored 164, not-affected 67, needed 3, needs-triage 2, pending 1.	https://ubuntu.com/security/CVE-2025-38138

Affected software / configurations for CVE-2025-38138

Vendor	Product	Version	Raw CPE
linux	linux_kernel	>= 5.6, < 5.10.239	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.11, < 5.15.186	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.16, < 6.1.142	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.2, < 6.6.94	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.7, < 6.12.34	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.13, < 6.15.3	cpe:2.3:o:linux:linux_kernel::::::::
debian	debian_linux	11.0	cpe:2.3:o:debian:debian_linux:11.0:::::::*

References for CVE-2025-38138

URL	Tags
https://git.kernel.org/stable/c/643db430f4cbd91dd2b63c49d62d0abb6debc13b	Patch
https://git.kernel.org/stable/c/9f133e04c62246353b8b1f0a679535c65161ebcf	Patch
https://git.kernel.org/stable/c/b79e10050d9d1e200541d25751dd5cb8ec58483c	Patch
https://git.kernel.org/stable/c/bc6ddff79835f71310a21645d8fcf08ec473e969	Patch
https://git.kernel.org/stable/c/d61d5ba5bd5b0e39e30b34dcd92946e084bca0d0	Patch
https://git.kernel.org/stable/c/ec1ea394c40523835bbedd8fc4934b77b461b6fe	Patch
https://git.kernel.org/stable/c/fd447415e74bccd7362f760d4ea727f8e1ebfe91	Patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html	Third Party Advisory

URL

CVE-2025-38138 | dmaengine: ti: Add NULL check in udma_probe()

Exploit prediction scoring system (EPSS) score for CVE-2025-38138

Common vulnerability scoring system (CVSS) metrics for CVE-2025-38138

Weakness enumeration for CVE-2025-38138

OS Trackers for CVE-2025-38138

Affected software / configurations for CVE-2025-38138

References for CVE-2025-38138