CVE-2025-39817

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: efivarfs: Fix slab-out-of-bounds in efivarfs_d_compare Observed on kernel 6.6 (present on master as well): BUG: KASAN: slab-out-of-bounds in memcmp+0x98/0xd0 Call trace: kasan_check_range+0xe8/0x190 __asan_loadN+0x1c/0x28 memcmp+0x98/0xd0 efivarfs_d_compare+0x68/0xd8 __d_lookup_rcu_op_compare+0x178/0x218 __d_lookup_rcu+0x1f8/0x228 d_alloc_parallel+0x150/0x648 lookup_open.isra.0+0x5f0/0x8d0 open_last_lookups+0x264/0x828 path_openat+0x130/0x3f8 do_filp_open+0x114/0x248 do_sys_openat2+0x340/0x3c0 __arm64_sys_openat+0x120/0x1a0...

Affected product and versions

Product

Linux Linux, SIMATIC CN 4100, linux kernel

Affected versions

>= da27a24383b2b10bf6ebd0db29b325548aafecb4 < 0f63fbabeaaaaaaf5b742a2f4c1b4590d50bf1f6, >= da27a24383b2b10bf6ebd0db29b325548aafecb4 < 794399019301944fd6d2e0d7a51b3327e26c410e, >= da27a24383b2b10bf6ebd0db29b325548aafecb4 < 568e7761279b99c6daa3002290fd6d8047ddb6d2, >= da27a24383b2b10bf6ebd0db29b325548aafecb4 < d7f5e35e70507d10cbaff5f9e194ed54c4ee14f7, >= da27a24383b2b10bf6ebd0db29b325548aafecb4 < 925599eba46045930b850a98ae594d2e3028ac40, >= da27a24383b2b10bf6ebd0db29b325548aafecb4 < c2925cd6207079c3f4d040d082515db78d63afbf, >= da27a24383b2b10bf6ebd0db29b325548aafecb4 < 71581a82f38e5a4d807d71fc1bb59aead80ccf95, >= da27a24383b2b10bf6ebd0db29b325548aafecb4 < a6358f8cf64850f3f27857b8ed8c1b08cfc4685c, >= 688289c4b745c018b3449b4b4c5a2030083c8eaf, >= 3.8.2 < 3.9, >= 3.9, < V5.0, >= 3.8.2 < 5.4.298, >= 5.5 < 5.10.242, >= 5.11 < 5.15.191, >= 5.16 < 6.1.150, >= 6.2 < 6.6.104, >= 6.7 < 6.12.45, >= 6.13 < 6.16.5, 6.17

Fixed versions

5.4.298, 5.10.242, 5.15.191, 6.1.150, 6.6.104, 6.12.45, 6.16.5

Technical data

CVSS vector

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

CWE

CWE-125