CVE-2025-38072 [Medium] | Security Vulnerability in Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: libnvdimm/labels: Fix divide error in nd_label_data_init() If a faulty CXL memory device returns a broken zero LSA size in its memory device information (Identify Memory Device (Opcode 4000h), CXL spec. 3.1, 8.2.9.9.1.1), a divide error occurs in the libnvdimm driver: Oops: divide error: 0000 [#1] PREEMPT SMP NOPTI RIP: 0010:nd_label_data_init+0x10e/0x800 [libnvdimm] Code and flow: 1) CXL Command 4000h returns LSA size = 0 2) config_size is assigned to zero LSA size (CXL pmem driver): drivers/cxl/pmem.c: .config_size = mds->lsa_size, 3) max_xfer is set to zero (nvdimm driver): drivers/nvdimm/label.c: max_xfer = min_t(size_t, ndd->nsarea.max_xfer, config_size); 4) A subsequent DIV_ROUND_UP() causes a division by zero: drivers/nvdimm/label.c: /* Make our initial read size a multiple of max_xfer size */ drivers/nvdimm/label.c: read_size = min(DIV_ROUND_UP(read_size, max_xfer) * max_xfer, drivers/nvdimm/label.c- config_size); Fix this by checking the config size parameter by extending an existing check.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-04-14	0.03%	0.09%	+0.06%
2	2025-12-18	0.06%	0.03%	-0.02%
3	2025-11-24	—	0.06%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-04-14

0.03%

0.09%

+0.06%

2025-12-18

0.06%

0.03%

-0.02%

2025-11-24

—

0.06%

—

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-2025-38072

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2025-38072 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-2025-38072
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2025-38072
`suse`	medium	—	https://www.suse.com/security/cve/CVE-2025-38072/
`ubuntu`	medium	CVE-2025-38072 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 168, needed 45, not-affected 21, needs-triage 2, pending 1.	https://ubuntu.com/security/CVE-2025-38072

Affected software / configurations for CVE-2025-38072

Vendor	Product	Version	Raw CPE
linux	linux_kernel	< 5.4.294	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.5, < 5.10.238	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.11, < 5.15.185	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.16, < 6.1.141	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.2, < 6.6.93	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.7, < 6.12.31	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.13, < 6.14.9	cpe:2.3:o:linux:linux_kernel::::::::
debian	debian_linux	11.0	cpe:2.3:o:debian:debian_linux:11.0:::::::*

References for CVE-2025-38072

URL	Tags
https://git.kernel.org/stable/c/1d1e1efad1cf049e888bf175a5c6be85d792620c	Patch
https://git.kernel.org/stable/c/2bd4a938d2eda96ab7288b8fa5aae84a1de8c4ca	Patch
https://git.kernel.org/stable/c/396c46d3f59a18ebcc500640e749f16e197d472b	Patch
https://git.kernel.org/stable/c/db1aef51b8e66a77f76b1250b914589c31a0a0ed	Patch
https://git.kernel.org/stable/c/e14347f647ca6d76fe1509b6703e340f2d5e2716	Patch
https://git.kernel.org/stable/c/ea3d95e05e97ea20fd6513f647393add16fce3b2	Patch
https://git.kernel.org/stable/c/ef1d3455bbc1922f94a91ed58d3d7db440652959	Patch
https://git.kernel.org/stable/c/f49c337037df029440a8390380dd35d2cf5924d3	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-2025-38072 | libnvdimm/labels: Fix divide error in nd_label_data_init()

Exploit prediction scoring system (EPSS) score for CVE-2025-38072

Common vulnerability scoring system (CVSS) metrics for CVE-2025-38072

Weakness enumeration for CVE-2025-38072

OS Trackers for CVE-2025-38072

Affected software / configurations for CVE-2025-38072

References for CVE-2025-38072