CVE-2025-38265 [Medium] | Security Vulnerability in Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: serial: jsm: fix NPE during jsm_uart_port_init No device was set which caused serial_base_ctrl_add to crash. BUG: kernel NULL pointer dereference, address: 0000000000000050 Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 16 UID: 0 PID: 368 Comm: (udev-worker) Not tainted 6.12.25-amd64 #1 Debian 6.12.25-1 RIP: 0010:serial_base_ctrl_add+0x96/0x120 Call Trace: <TASK> serial_core_register_port+0x1a0/0x580 ? __setup_irq+0x39c/0x660 ? __kmalloc_cache_noprof+0x111/0x310 jsm_uart_port_init+0xe8/0x180 [jsm] jsm_probe_one+0x1f4/0x410 [jsm] local_pci_probe+0x42/0x90 pci_device_probe+0x22f/0x270 really_probe+0xdb/0x340 ? pm_runtime_barrier+0x54/0x90 ? __pfx___driver_attach+0x10/0x10 __driver_probe_device+0x78/0x110 driver_probe_device+0x1f/0xa0 __driver_attach+0xba/0x1c0 bus_for_each_dev+0x8c/0xe0 bus_add_driver+0x112/0x1f0 driver_register+0x72/0xd0 jsm_init_module+0x36/0xff0 [jsm] ? __pfx_jsm_init_module+0x10/0x10 [jsm] do_one_initcall+0x58/0x310 do_init_module+0x60/0x230 Tested with Digi Neo PCIe 8 port card.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.06%	0.15%	+0.09%
2	2026-05-06	0.02%	0.06%	+0.04%
3	2025-07-10	—	0.02%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.06%

0.15%

+0.09%

2026-05-06

0.02%

0.06%

+0.04%

2025-07-10

—

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-2025-38265

vendor	priority	summary	link
`debian`	unimportant	CVE-2025-38265 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-2025-38265
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2025-38265
`suse`	medium	CVE-2025-38265 severity moderate: SUSE including 358 source package names (amazon/suse-sles-15-sp1-chost-byos-v20210304-hvm-ssd-x86_64, amazon/suse-sles-15-sp1-chost-byos-v20220127-hvm-ssd-x86_64, …), 828 product×package rows across 127 product lines (Image SLES-Azure-3P, Image SLES-Azure-Basic, … (127 product lines)): Fixed 311, Known Not Affected 265, Known Affected 231, First Fixed 21.	https://www.suse.com/security/cve/CVE-2025-38265/
`ubuntu`	medium	CVE-2025-38265 medium priority: Ubuntu including 158 source packages (linux, linux-allwinner-5.19, …), 1548 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 1142, ignored 164, released 137, not-affected 100, needed 2, needs-triage 2, pending 1.	https://ubuntu.com/security/CVE-2025-38265

Affected software / configurations for CVE-2025-38265

Vendor	Product	Version	Raw CPE
linux	linux_kernel	>= 6.5, < 6.6.94	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.7, < 6.12.33	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.13, < 6.14.11	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.15, < 6.15.2	cpe:2.3:o:linux:linux_kernel::::::::

References for CVE-2025-38265

URL	Tags
https://git.kernel.org/stable/c/3258d7ff8ebfa451426662b23e8f2b51b129afe1	Patch
https://git.kernel.org/stable/c/985961dd2688a527a4847300d41beaad475ab7af	Patch
https://git.kernel.org/stable/c/a14c0d2eb3f0b1836fdec22908b87ecffd2ac844	Patch
https://git.kernel.org/stable/c/abaecb2a4ad021c2f2426e9b2a9c020aef57aca9	Patch
https://git.kernel.org/stable/c/e3975aa899c0a3bbc10d035e699b142cd1373a71	Patch

URL

CVE-2025-38265 | serial: jsm: fix NPE during jsm_uart_port_init

Exploit prediction scoring system (EPSS) score for CVE-2025-38265

Common vulnerability scoring system (CVSS) metrics for CVE-2025-38265

Weakness enumeration for CVE-2025-38265

OS Trackers for CVE-2025-38265

Affected software / configurations for CVE-2025-38265

References for CVE-2025-38265