🛡️ CVE-2025-37781 — debian-linux

🟡 CVSS 5.5 — Medium ✅ No Known Exploit CWE-476 NVD

5.5

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

i2c: cros-ec-tunnel: defer probe if parent EC is not present

In the Linux kernel, the following vulnerability has been resolved:

i2c: cros-ec-tunnel: defer probe if parent EC is not present

When i2c-cros-ec-tunnel and the EC driver are built-in, the EC parent

device will not be found, leading to NULL pointer dereference.

That can also be reproduced by unbinding the controller driver and then

loading i2c-cros-ec-tunnel module (or binding the device).

[ 271.991245] BUG: kernel NULL pointer dereference, address: 0000000000000058

[ 271.998215] #PF: supervisor read access in kernel mode

[ 272.003351] #PF: error_code(0x0000) - not-present page

[ 272.008485] PGD 0 P4D 0

[ 272.011022] Oops: Oops: 0000 [#1] SMP NOPTI

[ 272.015207] CPU: 0 UID: 0 PID: 3859 Comm: insmod Tainted: G S 6.15.0-rc1-00004-g44722359ed83 #30 PREEMPT(full) 3c7fb39a552e7d949de2ad921a7d6588d3a4fdc5

[ 272.030312] Tainted: [S]=CPU_OUT_OF_SPEC

[ 272.034233] Hardware name: HP Berknip/Berknip, BIOS Google_Berknip.13434.356.0 05/17/2021

[ 272.042400] RIP: 0010:ec_i2c_probe+0x2b/0x1c0 [i2c_cros_ec_tunnel]

[ 272.048577] Code: 1f 44 00 00 41 57 41 56 41 55 41 54 53 48 83 ec 10 65 48 8b 05 06 a0 6c e7 48 89 44 24 08 4c 8d 7f 10 48 8b 47 50 4c 8b 60 78 <49> 83 7c 24 58 00 0f 84 2f 01 00 00 48 89 fb be 30 06 00 00 4c 9

[ 272.067317] RSP: 0018:ffffa32082a03940 EFLAGS: 00010282

[ 272.072541] RAX: ffff969580b6a810 RBX: ffff969580b68c10 RCX: 0000000000000000

[ 272.079672] RDX: 0000000000000000 RSI: 0000000000000282 RDI: ffff969580b68c00

[ 272.086804] RBP: 00000000fffffdfb R08: 0000000000000000 R09: 0000000000000000

[ 272.093936] R10: 0000000000000000 R11: ffffffffc0600000 R12: 0000000000000000

[ 272.101067] R13: ffffffffa666fbb8 R14: ffffffffc05b5528 R15: ffff969580b68c10

[ 272.108198] FS: 00007b930906fc40(0000) GS:ffff969603149000(0000) knlGS:0000000000000000

[ 272.116282] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

[ 272.122024] CR2: 0000000000000058 CR3: 000000012631c000 CR4: 00000000003506f0

[ 272.129155] Call Trace:

[ 272.131606] <TASK>

[ 272.133709] ? acpi_dev_pm_attach+0xdd/0x110

[ 272.137985] platform_probe+0x69/0xa0

[ 272.141652] really_probe+0x152/0x310

[ 272.145318] __driver_probe_device+0x77/0x110

[ 272.149678] driver_probe_device+0x1e/0x190

[ 272.153864] __driver_attach+0x10b/0x1e0

[ 272.157790] ? driver_attach+0x20/0x20

[ 272.161542] bus_for_each_dev+0x107/0x150

[ 272.165553] bus_add_driver+0x15d/0x270

[ 272.169392] driver_register+0x65/0x110

[ 272.173232] ? cleanup_module+0xa80/0xa80 [i2c_cros_ec_tunnel 3a00532f3f4af4a9eade753f86b0f8dd4e4e5698]

[ 272.182617] do_one_initcall+0x110/0x350

[ 272.186543] ? security_kernfs_init_security+0x49/0xd0

[ 272.191682] ? __kernfs_new_node+0x1b9/0x240

[ 272.195954] ? security_kernfs_init_security+0x49/0xd0

[ 272.201093] ? __kernfs_new_node+0x1b9/0x240

[ 272.205365] ? kernfs_link_sibling+0x105/0x130

[ 272.209810] ? kernfs_next_descendant_post+0x1c/0xa0

[ 272.214773] ? kernfs_activate+0x57/0x70

[ 272.218699] ? kernfs_add_one+0x118/0x160

[ 272.222710] ? __kernfs_create_file+0x71/0xa0

[ 272.227069] ? sysfs_add_bin_file_mode_ns+0xd6/0x110

[ 272.232033] ? internal_create_group+0x453/0x4a0

[ 272.236651] ? __vunmap_range_noflush+0x214/0x2d0

[ 272.241355] ? __free_frozen_pages+0x1dc/0x420

[ 272.245799] ? free_vmap_area_noflush+0x10a/0x1c0

[ 272.250505] ? load_module+0x1509/0x16f0

[ 272.254431] do_init_module+0x60/0x230

[ 272.258181] __se_sys_finit_module+0x27a/0x370

[ 272.262627] do_syscall_64+0x6a/0xf0

[ 272.266206] ? do_syscall_64+0x76/0xf0

[ 272.269956] ? irqentry_exit_to_user_mode+0x79/0x90

[ 272.274836] entry_SYSCALL_64_after_hwframe+0x55/0x5d

[ 272.279887] RIP: 0033:0x7b9309168d39

[ 272.283466] Code: 5b 41 5c 5d c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d af 40 0c 00 f7 d8 64 89 01 8

[ 272.302210] RSP: 002b:00007fff50f1a288 EFLAGS: 00000246 ORIG_RAX: 000

---truncated---

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Weakness class

CVE-2025-37781 is classified as CWE-476: NULL Pointer Dereference. A pointer that can be null is used without a check, crashing the process.

Affected software

CVE-2025-37781 is recorded against 3 packages.

debian-linux
kernel (from 6.13.0 up to 6.14.4)
linux-kernel

Timeline and source

Published on 1 May 2025 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
lists.debian.org
lists.debian.org

CVE-2025-37781 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

BellSoft Debian Debian 12 (Root.io)Ubuntu 22.04 (Root.io)Ubuntu 24.04 (Root.io)Ubuntu

Details

Severity MEDIUM

CVSS Score 5.5

CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE CWE-476

Public Exploit ✅ No

Source NVD

Published 2025-05-01

Updated 2026-08-20

Modified 2026-06-17

Fix URL https://git.kernel.org/stable/c/092de5ac8cb2eaa9593a765fa92ba39d8173f984

Affected Packages

Software	From version	Fixed in
debian-linux	—	—
kernel	6.13.0	6.14.4
linux-kernel	—	—

References

Patch https://git.kernel.org/stable/c/092de5ac8cb2eaa9593a765fa92ba39d8173f984

Patch https://git.kernel.org/stable/c/1355b5ca4782be85a2ef7275e4c508f770d0fb27

Patch https://git.kernel.org/stable/c/3090cad5ccff8963b95160f4060068048a1e4c4c

Patch https://git.kernel.org/stable/c/424eafe65647a8d6c690284536e711977153195a

Patch https://git.kernel.org/stable/c/b66d4910a608427367c4e21499e149f085782df7

Patch https://git.kernel.org/stable/c/cd83035b6f2a102c2d5acd3bfb2a11ff967aaba6

Patch https://git.kernel.org/stable/c/da8edc9eb2516aface7f86be5fa6d09c0d07b9f8

Patch https://git.kernel.org/stable/c/e89bf1311d4497c6743f3021e9c481b16c3a41c9

Mailing List, Third Party Advisory https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html

Mailing List, Third Party Advisory https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html

🔗 NVD 🔗 Mitre ✅ Fix / Advisory

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