NVD Vulnerability Detail

CVE-2024-43895

Summary	In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Skip Recompute DSC Params if no Stream on Link [why] Encounter NULL pointer dereference uner mst + dsc setup. BUG: kernel NULL pointer dereference, address: 0000000000000008 PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 4 PID: 917 Comm: sway Not tainted 6.3.9-arch1-1 #1 124dc55df4f5272ccb409f39ef4872fc2b3376a2 Hardware name: LENOVO 20NKS01Y00/20NKS01Y00, BIOS R12ET61W(1.31 ) 07/28/2022 RIP: 0010:drm_dp_atomic_find_time_slots+0x5e/0x260 [drm_display_helper] Code: 01 00 00 48 8b 85 60 05 00 00 48 63 80 88 00 00 00 3b 43 28 0f 8d 2e 01 00 00 48 8b 53 30 48 8d 04 80 48 8d 04 c2 48 8b 40 18 <48> 8> RSP: 0018:ffff960cc2df77d8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff8afb87e81280 RCX: 0000000000000224 RDX: ffff8afb9ee37c00 RSI: ffff8afb8da1a578 RDI: ffff8afb87e81280 RBP: ffff8afb83d67000 R08: 0000000000000001 R09: ffff8afb9652f850 R10: ffff960cc2df7908 R11: 0000000000000002 R12: 0000000000000000 R13: ffff8afb8d7688a0 R14: ffff8afb8da1a578 R15: 0000000000000224 FS: 00007f4dac35ce00(0000) GS:ffff8afe30b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000008 CR3: 000000010ddc6000 CR4: 00000000003506e0 Call Trace: <TASK> ? __die+0x23/0x70 ? page_fault_oops+0x171/0x4e0 ? plist_add+0xbe/0x100 ? exc_page_fault+0x7c/0x180 ? asm_exc_page_fault+0x26/0x30 ? drm_dp_atomic_find_time_slots+0x5e/0x260 [drm_display_helper 0e67723696438d8e02b741593dd50d80b44c2026] ? drm_dp_atomic_find_time_slots+0x28/0x260 [drm_display_helper 0e67723696438d8e02b741593dd50d80b44c2026] compute_mst_dsc_configs_for_link+0x2ff/0xa40 [amdgpu 62e600d2a75e9158e1cd0a243bdc8e6da040c054] ? fill_plane_buffer_attributes+0x419/0x510 [amdgpu 62e600d2a75e9158e1cd0a243bdc8e6da040c054] compute_mst_dsc_configs_for_state+0x1e1/0x250 [amdgpu 62e600d2a75e9158e1cd0a243bdc8e6da040c054] amdgpu_dm_atomic_check+0xecd/0x1190 [amdgpu 62e600d2a75e9158e1cd0a243bdc8e6da040c054] drm_atomic_check_only+0x5c5/0xa40 drm_mode_atomic_ioctl+0x76e/0xbc0 [how] dsc recompute should be skipped if no mode change detected on the new request. If detected, keep checking whether the stream is already on current state or not. (cherry picked from commit 8151a6c13111b465dbabe07c19f572f7cbd16fef)
Publication Date	Aug. 26, 2024, 8:15 p.m.
Registration Date	Aug. 27, 2024, 5:01 a.m.
Last Update	Oct. 10, 2024, 9:15 p.m.

CVSS3.1 : MEDIUM
スコア	5.5
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
攻撃元区分(AV)	ローカル
攻撃条件の複雑さ(AC)	低
攻撃に必要な特権レベル(PR)	低
利用者の関与(UI)	不要
影響の想定範囲(S)	変更なし
機密性への影響(C)	なし
完全性への影響(I)	なし
可用性への影響(A)	高

Affected software configurations

Configuration1	or higher	or less	more than	less than
cpe:2.3:o:linux:linux_kernel:6.11:rc1::::::
cpe:2.3:o:linux:linux_kernel::::::::	6.7			6.10.5
cpe:2.3:o:linux:linux_kernel::::::::	6.2			6.6.46
cpe:2.3:o:linux:linux_kernel::::::::				6.1.105
cpe:2.3:o:linux:linux_kernel:6.11:rc2::::::

Related information, measures and tools

No	URL	タグ
1	https://git.kernel.org/stable/c/282f0a482ee61d5e863512f3c4fcec90216c20d9	Patch
2	https://git.kernel.org/stable/c/718d83f66fb07b2cab89a1fc984613a00e3db18f	Patch
3	https://git.kernel.org/stable/c/70275bb960c71d313254473d38c14e7101cee5ad	Patch
4	https://git.kernel.org/stable/c/50e376f1fe3bf571d0645ddf48ad37eb58323919	Patch
5	https://git.kernel.org/stable/c/5357141b4c2e2b332b6f11607ba8c5fbc2669a10

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-476	NULL ポインタデリファレンス	https://cwe.mitre.org/data/definitions/476.html

JVN Vulnerability Information

Linux の Linux Kernel における NULL ポインタデリファレンスに関する脆弱性

Title	Linux の Linux Kernel における NULL ポインタデリファレンスに関する脆弱性
Summary	Linux の Linux Kernel には、NULL ポインタデリファレンスに関する脆弱性が存在します。
Possible impacts	サービス運用妨害 (DoS) 状態にされる可能性があります。
Solution	ベンダより正式な対策が公開されています。ベンダ情報を参照して適切な対策を実施してください。
Publication Date	Aug. 7, 2024, midnight
Registration Date	Sept. 11, 2024, 2:10 p.m.
Last Update	Sept. 11, 2024, 2:10 p.m.

Affected System

Linux

Linux Kernel 6.1.105 未満

Linux Kernel 6.11

Linux Kernel 6.2 以上 6.6.46 未満

Linux Kernel 6.7 以上 6.10.5 未満

CVE (情報セキュリティ共通脆弱性識別子)

No	Name	URL
Common Vulnerabilities and Exposures (CVE)
1	CVE-2024-43895	https://www.cve.org/CVERecord?id=CVE-2024-43895
National Vulnerability Database (NVD)
2	CVE-2024-43895	https://nvd.nist.gov/vuln/detail/CVE-2024-43895

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-476	http://cwe.mitre.org/data/definitions/476.html

ベンダー情報

No	Name	URL
Kernel.org git repositories
1	drm/amd/display: Skip Recompute DSC Params if no Stream on Link (282f0a4)	https://git.kernel.org/stable/c/282f0a482ee61d5e863512f3c4fcec90216c20d9
2	drm/amd/display: Skip Recompute DSC Params if no Stream on Link (50e376f)	https://git.kernel.org/stable/c/50e376f1fe3bf571d0645ddf48ad37eb58323919
3	drm/amd/display: Skip Recompute DSC Params if no Stream on Link (70275bb)	https://git.kernel.org/stable/c/70275bb960c71d313254473d38c14e7101cee5ad
4	drm/amd/display: Skip Recompute DSC Params if no Stream on Link (718d83f)	https://git.kernel.org/stable/c/718d83f66fb07b2cab89a1fc984613a00e3db18f
Linux Kernel
5	Linux Kernel Archives	https://www.kernel.org

Change Log

No	Changed Details	Date of change
1	[2024年09月11日] 掲載	Sept. 11, 2024, 2:10 p.m.