🛡️ CVE-2024-43901 — kernel

🟡 CVSS 5.5 — Medium ✅ No Known Exploit NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

drm/amd/display: Fix NULL pointer dereference for DTN log in DCN401

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

drm/amd/display: Fix NULL pointer dereference for DTN log in DCN401

When users run the command:

cat /sys/kernel/debug/dri/0/amdgpu_dm_dtn_log

The following NULL pointer dereference happens:

[ +0.000003] BUG: kernel NULL pointer dereference, address: NULL

[ +0.000005] #PF: supervisor instruction fetch in kernel mode

[ +0.000002] #PF: error_code(0x0010) - not-present page

[ +0.000002] PGD 0 P4D 0

[ +0.000004] Oops: 0010 [#1] PREEMPT SMP NOPTI

[ +0.000003] RIP: 0010:0x0

[ +0.000008] Code: Unable to access opcode bytes at 0xffffffffffffffd6.

[...]

[ +0.000002] PKRU: 55555554

[ +0.000002] Call Trace:

[ +0.000002] <TASK>

[ +0.000003] ? show_regs+0x65/0x70

[ +0.000006] ? __die+0x24/0x70

[ +0.000004] ? page_fault_oops+0x160/0x470

[ +0.000006] ? do_user_addr_fault+0x2b5/0x690

[ +0.000003] ? prb_read_valid+0x1c/0x30

[ +0.000005] ? exc_page_fault+0x8c/0x1a0

[ +0.000005] ? asm_exc_page_fault+0x27/0x30

[ +0.000012] dcn10_log_color_state+0xf9/0x510 [amdgpu]

[ +0.000306] ? srso_alias_return_thunk+0x5/0xfbef5

[ +0.000003] ? vsnprintf+0x2fb/0x600

[ +0.000009] dcn10_log_hw_state+0xfd0/0xfe0 [amdgpu]

[ +0.000218] ? __mod_memcg_lruvec_state+0xe8/0x170

[ +0.000008] ? srso_alias_return_thunk+0x5/0xfbef5

[ +0.000002] ? debug_smp_processor_id+0x17/0x20

[ +0.000003] ? srso_alias_return_thunk+0x5/0xfbef5

[ +0.000002] ? srso_alias_return_thunk+0x5/0xfbef5

[ +0.000002] ? set_ptes.isra.0+0x2b/0x90

[ +0.000004] ? srso_alias_return_thunk+0x5/0xfbef5

[ +0.000002] ? _raw_spin_unlock+0x19/0x40

[ +0.000004] ? srso_alias_return_thunk+0x5/0xfbef5

[ +0.000002] ? do_anonymous_page+0x337/0x700

[ +0.000004] dtn_log_read+0x82/0x120 [amdgpu]

[ +0.000207] full_proxy_read+0x66/0x90

[ +0.000007] vfs_read+0xb0/0x340

[ +0.000005] ? __count_memcg_events+0x79/0xe0

[ +0.000002] ? srso_alias_return_thunk+0x5/0xfbef5

[ +0.000003] ? count_memcg_events.constprop.0+0x1e/0x40

[ +0.000003] ? handle_mm_fault+0xb2/0x370

[ +0.000003] ksys_read+0x6b/0xf0

[ +0.000004] __x64_sys_read+0x19/0x20

[ +0.000003] do_syscall_64+0x60/0x130

[ +0.000004] entry_SYSCALL_64_after_hwframe+0x6e/0x76

[ +0.000003] RIP: 0033:0x7fdf32f147e2

[...]

This error happens when the color log tries to read the gamut remap

information from DCN401 which is not initialized in the dcn401_dpp_funcs

which leads to a null pointer dereference. This commit addresses this

issue by adding a proper guard to access the gamut_remap callback in

case the specific ASIC did not implement this function.

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.

Affected software

CVE-2024-43901 is recorded against 2 packages.

  • kernel (from 4.15.0 up to 6.10.5)
  • linux-kernel (fixed in 6.10.5)

Timeline and source

Published on 26 August 2024 and last revised on 12 August 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 (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

CVE-2024-43901 on other distributions

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

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 N/A
Public Exploit ✅ No
Source NVD
Published 2024-08-26
Updated 2026-08-20
Modified 2026-08-12

Affected Packages

Software From version Fixed in
kernel 4.15.0 6.10.5
linux-kernel — 6.10.5

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