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Fencer Vulns
high 7.8

CVE-2025-39818 json

HID: intel-thc-hid: intel-thc: Fix incorrect pointer arithmetic in I2C regs save

published 2025-09-16 13 mo ago modified 2026-10-19 20 d ago also EUVD-2025-29596

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 3%
public exploits
0
none known

Summary

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

HID: intel-thc-hid: intel-thc: Fix incorrect pointer arithmetic in I2C regs save

Improper use of secondary pointer (&dev->i2c_subip_regs) caused kernel crash and out-of-bounds error:

BUG: KASAN: slab-out-of-bounds in _regmap_bulk_read+0x449/0x510 Write of size 4 at addr ffff888136005dc0 by task kworker/u33:5/5107

CPU: 3 UID: 0 PID: 5107 Comm: kworker/u33:5 Not tainted 6.16.0+ #3 PREEMPT(voluntary) Workqueue: async async_run_entry_fn Call Trace: <TASK> dump_stack_lvl+0x76/0xa0 print_report+0xd1/0x660 ? __pfx__raw_spin_lock_irqsave+0x10/0x10 ? kasan_complete_mode_report_info+0x26/0x200 kasan_report+0xe1/0x120 ? _regmap_bulk_read+0x449/0x510 ? _regmap_bulk_read+0x449/0x510 __asan_report_store4_noabort+0x17/0x30 _regmap_bulk_read+0x449/0x510 ? __pfx__regmap_bulk_read+0x10/0x10 regmap_bulk_read+0x270/0x3d0 pio_complete+0x1ee/0x2c0 [intel_thc] ? __pfx_pio_complete+0x10/0x10 [intel_thc] ? __pfx_pio_wait+0x10/0x10 [intel_thc] ? regmap_update_bits_base+0x13b/0x1f0 thc_i2c_subip_pio_read+0x117/0x270 [intel_thc] thc_i2c_subip_regs_save+0xc2/0x140 [intel_thc] ? __pfx_thc_i2c_subip_regs_save+0x10/0x10 [intel_thc] [...] The buggy address belongs to the object at ffff888136005d00 which belongs to the cache kmalloc-rnd-12-192 of size 192 The buggy address is located 0 bytes to the right of allocated 192-byte region [ffff888136005d00, ffff888136005dc0)

Replaced with direct array indexing (&dev->i2c_subip_regs[i]) to ensure safe memory access.

Patch / fix

  • Linux Linux 6.16.5, 6.17
  • linux Debian 14 6.16.5-1

debian advisories DEBIAN-CVE-2025-39818

  • linux-aws-6.14 Ubuntu 24.04 LTS 6.14.0-1017.17~24.04.1
  • linux-gcp-6.14 Ubuntu 24.04 LTS 6.14.0-1020.21~24.04.1
  • linux-oem-6.14 Ubuntu 24.04 LTS 6.14.0-1010.10
  • linux-azure-6.14 Ubuntu 24.04 LTS 6.14.0-1017.17~24.04.1
  • linux-riscv-6.14 Ubuntu 24.04 LTS 6.14.0-36.36.1~24.04.1
  • linux-oracle-6.14 Ubuntu 24.04 LTS 6.14.0-1017.17~24.04.1
  • linux-realtime-6.14 Ubuntu Pro Realtime 24.04 LTS 6.14.0-1016.16~24.04.1

ubuntu advisories UBUNTU-CVE-2025-39818

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel RHEL 9 5.14.0-611.41.1.el9_7
  • rv RHEL 9 5.14.0-611.41.1.el9_7
  • perf RHEL 9 5.14.0-611.41.1.el9_7
  • rtla RHEL 9 5.14.0-611.41.1.el9_7
  • libperf RHEL 9 5.14.0-611.41.1.el9_7
  • kernel-rt RHEL 9 5.14.0-611.41.1.el9_7
  • kernel-64k RHEL 9 5.14.0-611.41.1.el9_7
  • kernel-core RHEL 9 5.14.0-611.41.1.el9_7

red hat advisories RHSA-2026:4759RHSA-2026:4012

  • kernel AlmaLinux 9 5.14.0-611.41.1.el9_7
  • rv AlmaLinux 9 5.14.0-611.41.1.el9_7
  • perf AlmaLinux 9 5.14.0-611.41.1.el9_7
  • rtla AlmaLinux 9 5.14.0-611.41.1.el9_7
  • libperf AlmaLinux 9 5.14.0-611.41.1.el9_7
  • kernel-rt AlmaLinux 9 5.14.0-611.41.1.el9_7
  • kernel-64k AlmaLinux 9 5.14.0-611.41.1.el9_7
  • kernel-core AlmaLinux 9 5.14.0-611.41.1.el9_7

almalinux advisories ALSA-2026:4759ALSA-2026:4012

  • kernel Rocky Linux 9 5.14.0-611.41.1.el9_7

rocky linux advisories RLSA-2026:4759

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-39818 updated cvss 5.5

kernel: HID: intel-thc-hid: intel-thc: Fix incorrect pointer arithmetic in I2C regs save

  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-611.41.1.el9_7, perf 5.14.0-611.41.1.el9_7, rtla 5.14.0-611.41.1.el9_7, python3-perf 5.14.0-611.41.1.el9_7, kernel-devel-matched 5.14.0-611.41.1.el9_7, kernel-64k-devel-matched 5.14.0-611.41.1.el9_7, +7 more
    fixed: vendor fix RHSA-2026:4759
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-124.43.1.el10_1, perf 6.12.0-124.43.1.el10_1, rtla 6.12.0-124.43.1.el10_1, python3-perf 6.12.0-124.43.1.el10_1, kernel-devel-matched 6.12.0-124.43.1.el10_1, kernel-64k-devel-matched 6.12.0-124.43.1.el10_1, +7 more
    fixed: vendor fix RHSA-2026:4012
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-611.41.1.el9_7, kernel-64k 5.14.0-611.41.1.el9_7, kernel-core 5.14.0-611.41.1.el9_7, kernel-tools 5.14.0-611.41.1.el9_7, kernel-modules 5.14.0-611.41.1.el9_7, kernel-64k-core 5.14.0-611.41.1.el9_7, +27 more
    fixed: vendor fix RHSA-2026:4759
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-124.43.1.el10_1, kernel-64k 6.12.0-124.43.1.el10_1, kernel-core 6.12.0-124.43.1.el10_1, kernel-tools 6.12.0-124.43.1.el10_1, kernel-modules 6.12.0-124.43.1.el10_1, kernel-64k-core 6.12.0-124.43.1.el10_1, +28 more
    fixed: vendor fix RHSA-2026:4012
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-611.41.1.el9_7, kernel-debuginfo-common-s390x 5.14.0-611.41.1.el9_7, kernel-debuginfo-common-x86_64 5.14.0-611.41.1.el9_7, kernel-debuginfo-common-aarch64 5.14.0-611.41.1.el9_7, kernel-debuginfo-common-ppc64le 5.14.0-611.41.1.el9_7
    fixed: vendor fix RHSA-2026:4759
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-124.43.1.el10_1, kernel-debuginfo-common-s390x 6.12.0-124.43.1.el10_1, kernel-debuginfo-common-x86_64 6.12.0-124.43.1.el10_1, kernel-debuginfo-common-aarch64 6.12.0-124.43.1.el10_1, kernel-debuginfo-common-ppc64le 6.12.0-124.43.1.el10_1
    fixed: vendor fix RHSA-2026:4012
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-611.41.1.el9_7, kernel-rt-64k 5.14.0-611.41.1.el9_7, kernel-rt-core 5.14.0-611.41.1.el9_7, kernel-rt-modules 5.14.0-611.41.1.el9_7, kernel-rt-64k-core 5.14.0-611.41.1.el9_7, kernel-rt-debug-core 5.14.0-611.41.1.el9_7, +14 more
    fixed: vendor fix RHSA-2026:4759
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-124.43.1.el10_1, kernel-rt-64k 6.12.0-124.43.1.el10_1, kernel-rt-core 6.12.0-124.43.1.el10_1, kernel-rt-modules 6.12.0-124.43.1.el10_1, kernel-rt-64k-core 6.12.0-124.43.1.el10_1, kernel-rt-debug-core 6.12.0-124.43.1.el10_1, +14 more
    fixed: vendor fix RHSA-2026:4012
show 3 more
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-611.41.1.el9_7, kernel-rt-core 5.14.0-611.41.1.el9_7, kernel-rt-modules 5.14.0-611.41.1.el9_7, kernel-rt-debug-core 5.14.0-611.41.1.el9_7, kernel-rt-modules-core 5.14.0-611.41.1.el9_7, kernel-rt-debug-modules 5.14.0-611.41.1.el9_7, +4 more
    fixed: vendor fix RHSA-2026:4759
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-124.43.1.el10_1, kernel-rt-core 6.12.0-124.43.1.el10_1, kernel-rt-modules 6.12.0-124.43.1.el10_1, kernel-rt-debug-core 6.12.0-124.43.1.el10_1, kernel-rt-modules-core 6.12.0-124.43.1.el10_1, kernel-rt-debug-modules 6.12.0-124.43.1.el10_1, +4 more
    fixed: vendor fix RHSA-2026:4012
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
9 mo ago

Exploit prediction

0.15% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA ADP 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux Linux

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.