CVE-2025-38252 [Medium] | Security Vulnerability in Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: cxl/ras: Fix CPER handler device confusion By inspection, cxl_cper_handle_prot_err() is making a series of fragile assumptions that can lead to crashes: 1/ It assumes that endpoints identified in the record are a CXL-type-3 device, nothing guarantees that. 2/ It assumes that the device is bound to the cxl_pci driver, nothing guarantees that. 3/ Minor, it holds the device lock over the switch-port tracing for no reason as the trace is 100% generated from data in the record. Correct those by checking that the PCIe endpoint parents a cxl_memdev before assuming the format of the driver data, and move the lock to where it is required. Consequently this also makes the implementation ready for CXL accelerators that are not bound to cxl_pci.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-05-05	0.02%	0.07%	+0.06%
2	2025-07-09	—	0.02%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-05-05

0.02%

0.07%

+0.06%

2025-07-09

—

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-2025-38252

vendor	priority	summary	link
`debian`	unimportant	CVE-2025-38252 unimportant 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-2025-38252
`redhat`	—	—	https://access.redhat.com/security/cve/CVE-2025-38252
`suse`	medium	CVE-2025-38252 severity moderate: SUSE including 26 source package names (cluster-md-kmp-default, dlm-kmp-default, …), 281 product×package rows across 55 product lines (SLES-LTSS-TERADATA 15 SP2, SUSE Linux Enterprise High Availability Extension 15 SP7, … (55 product lines)): Known Not Affected 281.	https://www.suse.com/security/cve/CVE-2025-38252/
`ubuntu`	medium	CVE-2025-38252 medium priority: Ubuntu including 144 source packages (linux, linux-allwinner-5.19, …), 1286 status rows across 9 suites (bionic, focal, jammy, noble, oracular, plucky, trusty, upstream, xenial): DNE 922, ignored 151, not-affected 136, released 77.	https://ubuntu.com/security/CVE-2025-38252

Affected software / configurations for CVE-2025-38252

Vendor	Product	Version	Raw CPE
linux	linux_kernel	>= 6.15, < 6.15.5	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	6.16	cpe:2.3:o:linux:linux_kernel:6.16:rc1::::::
linux	linux_kernel	6.16	cpe:2.3:o:linux:linux_kernel:6.16:rc2::::::
linux	linux_kernel	6.16	cpe:2.3:o:linux:linux_kernel:6.16:rc3::::::

References for CVE-2025-38252

URL	Tags
https://git.kernel.org/stable/c/3c70ec71abdaf4e4fa48cd8fdfbbd864d78235a8	Patch
https://git.kernel.org/stable/c/4bcb8dd36e9e3fad6c22862ac5b6993df838309b	Patch

URL

CVE-2025-38252 | cxl/ras: Fix CPER handler device confusion

Exploit prediction scoring system (EPSS) score for CVE-2025-38252

Common vulnerability scoring system (CVSS) metrics for CVE-2025-38252

Weakness enumeration for CVE-2025-38252

OS Trackers for CVE-2025-38252

Affected software / configurations for CVE-2025-38252

References for CVE-2025-38252