Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Fix a null pointer access when the smc_rreg pointer is NULL In certain types of chips, such as VEGA20, reading the amdgpu_regs_smc file could result in an abnormal null pointer access when the smc_rreg pointer is NULL. Below are the steps to reproduce this issue and the corresponding exception log: 1. Navigate to the directory: /sys/kernel/debug/dri/0 2. Execute command: cat amdgpu_regs_smc 3. Exception Log:: [4005007.702554] BUG: kernel NULL pointer dereference, address: 0000000000000000 [4005007.702562] #PF: supervisor instruction fetch in kernel mode [4005007.702567] #PF: error_code(0x0010) - not-present page [4005007.702570] PGD 0 P4D 0 [4005007.702576] Oops: 0010 [#1] SMP NOPTI [4005007.702581] CPU: 4 PID: 62563 Comm: cat Tainted: G OE 5.15.0-43-generic #46-Ubunt u [4005007.702590] RIP: 0010:0x0 [4005007.702598] Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6. [4005007.702600] RSP: 0018:ffffa82b46d27da0 EFLAGS: 00010206 [4005007.702605] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffa82b46d27e68 [4005007.702609] RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff9940656e0000 [4005007.702612] RBP: ffffa82b46d27dd8 R08: 0000000000000000 R09: ffff994060c07980 [4005007.702615] R10: 0000000000020000 R11: 0000000000000000 R12: 00007f5e06753000 [4005007.702618] R13: ffff9940656e0000 R14: ffffa82b46d27e68 R15: 00007f5e06753000 [4005007.702622] FS: 00007f5e0755b740(0000) GS:ffff99479d300000(0000) knlGS:0000000000000000 [4005007.702626] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [4005007.702629] CR2: ffffffffffffffd6 CR3: 00000003253fc000 CR4: 00000000003506e0 [4005007.702633] Call Trace: [4005007.702636] <TASK> [4005007.702640] amdgpu_debugfs_regs_smc_read+0xb0/0x120 [amdgpu] [4005007.703002] full_proxy_read+0x5c/0x80 [4005007.703011] vfs_read+0x9f/0x1a0 [4005007.703019] ksys_read+0x67/0xe0 [4005007.703023] __x64_sys_read+0x19/0x20 [4005007.703028] do_syscall_64+0x5c/0xc0 [4005007.703034] ? do_user_addr_fault+0x1e3/0x670 [4005007.703040] ? exit_to_user_mode_prepare+0x37/0xb0 [4005007.703047] ? irqentry_exit_to_user_mode+0x9/0x20 [4005007.703052] ? irqentry_exit+0x19/0x30 [4005007.703057] ? exc_page_fault+0x89/0x160 [4005007.703062] ? asm_exc_page_fault+0x8/0x30 [4005007.703068] entry_SYSCALL_64_after_hwframe+0x44/0xae [4005007.703075] RIP: 0033:0x7f5e07672992 [4005007.703079] Code: c0 e9 b2 fe ff ff 50 48 8d 3d fa b2 0c 00 e8 c5 1d 02 00 0f 1f 44 00 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 0f 05 <48> 3d 00 f0 ff ff 77 56 c3 0f 1f 44 00 00 48 83 e c 28 48 89 54 24 [4005007.703083] RSP: 002b:00007ffe03097898 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [4005007.703088] RAX: ffffffffffffffda RBX: 0000000000020000 RCX: 00007f5e07672992 [4005007.703091] RDX: 0000000000020000 RSI: 00007f5e06753000 RDI: 0000000000000003 [4005007.703094] RBP: 00007f5e06753000 R08: 00007f5e06752010 R09: 00007f5e06752010 [4005007.703096] R10: 0000000000000022 R11: 0000000000000246 R12: 0000000000022000 [4005007.703099] R13: 0000000000000003 R14: 0000000000020000 R15: 0000000000020000 [4005007.703105] </TASK> [4005007.703107] Modules linked in: nf_tables libcrc32c nfnetlink algif_hash af_alg binfmt_misc nls_ iso8859_1 ipmi_ssif ast intel_rapl_msr intel_rapl_common drm_vram_helper drm_ttm_helper amd64_edac t tm edac_mce_amd kvm_amd ccp mac_hid k10temp kvm acpi_ipmi ipmi_si rapl sch_fq_codel ipmi_devintf ipm i_msghandler msr parport_pc ppdev lp parport mtd pstore_blk efi_pstore ramoops pstore_zone reed_solo mon ip_tables x_tables autofs4 ib_uverbs ib_core amdgpu(OE) amddrm_ttm_helper(OE) amdttm(OE) iommu_v 2 amd_sched(OE) amdkcl(OE) drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops cec rc_core drm igb ahci xhci_pci libahci i2c_piix4 i2c_algo_bit xhci_pci_renesas dca [4005007.703184] CR2: 0000000000000000 [4005007.703188] ---[ en ---truncated---

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CVSS Version 4.0 CVSS Version 3.x CVSS Version 2.0

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CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score:  5.5 MEDIUM

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

CVSS 2.0 Severity and Vector Strings:

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

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Hyperlink	Resource
https://git.kernel.org/stable/c/174f62a0aa15c211e60208b41ee9e7cdfb73d455	Patch
https://git.kernel.org/stable/c/437e0fa907ba39b4d7eda863c03ea9cf48bd93a9	Patch
https://git.kernel.org/stable/c/5104fdf50d326db2c1a994f8b35dcd46e63ae4ad	Patch
https://git.kernel.org/stable/c/6c1b3d89a2dda79881726bb6e37af19c0936d736	Patch
https://git.kernel.org/stable/c/820daf9ffe2b0afb804567b10983fb38bc5ae288	Patch
https://git.kernel.org/stable/c/ba3c0796d292de84f2932cc5bbb0f771fc720996	Patch
https://git.kernel.org/stable/c/bf2d51eedf03bd61e3556e35d74d49e2e6112398	Patch
https://git.kernel.org/stable/c/f475d5502f33a6c5b149b0afe96316ad1962a64a	Patch

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-476	NULL Pointer Dereference	NIST

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Change History

3 change records found show changes

CVE Modified by kernel.org 5/29/2024 2:16:18 AM

Action	Type	Old Value	New Value

Initial Analysis by NIST 5/23/2024 9:14:32 PM

Action	Type	Old Value	New Value
Added	CPE Configuration		Record truncated, showing 500 of 732 characters. View Entire Change Record OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 4.19.300 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.262 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.202 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.140 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up
Added	CVSS V3.1		NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Added	CWE		NIST CWE-476
Changed	Reference Type	https://git.kernel.org/stable/c/174f62a0aa15c211e60208b41ee9e7cdfb73d455 No Types Assigned	https://git.kernel.org/stable/c/174f62a0aa15c211e60208b41ee9e7cdfb73d455 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/437e0fa907ba39b4d7eda863c03ea9cf48bd93a9 No Types Assigned	https://git.kernel.org/stable/c/437e0fa907ba39b4d7eda863c03ea9cf48bd93a9 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/5104fdf50d326db2c1a994f8b35dcd46e63ae4ad No Types Assigned	https://git.kernel.org/stable/c/5104fdf50d326db2c1a994f8b35dcd46e63ae4ad Patch
Changed	Reference Type	https://git.kernel.org/stable/c/6c1b3d89a2dda79881726bb6e37af19c0936d736 No Types Assigned	https://git.kernel.org/stable/c/6c1b3d89a2dda79881726bb6e37af19c0936d736 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/820daf9ffe2b0afb804567b10983fb38bc5ae288 No Types Assigned	https://git.kernel.org/stable/c/820daf9ffe2b0afb804567b10983fb38bc5ae288 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/ba3c0796d292de84f2932cc5bbb0f771fc720996 No Types Assigned	https://git.kernel.org/stable/c/ba3c0796d292de84f2932cc5bbb0f771fc720996 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/bf2d51eedf03bd61e3556e35d74d49e2e6112398 No Types Assigned	https://git.kernel.org/stable/c/bf2d51eedf03bd61e3556e35d74d49e2e6112398 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/f475d5502f33a6c5b149b0afe96316ad1962a64a No Types Assigned	https://git.kernel.org/stable/c/f475d5502f33a6c5b149b0afe96316ad1962a64a Patch

New CVE Received by NIST 5/21/2024 12:15:19 PM

Action	Type	Old Value	New Value
Added	Description		Record truncated, showing 500 of 3998 characters. View Entire Change Record In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Fix a null pointer access when the smc_rreg pointer is NULL In certain types of chips, such as VEGA20, reading the amdgpu_regs_smc file could result in an abnormal null pointer access when the smc_rreg pointer is NULL. Below are the steps to reproduce this issue and the corresponding exception log: 1. Navigate to the directory: /sys/kernel/debug/dri/0 2. Execute command: cat amdgpu_regs_smc 3. Exception Log:: [400
Added	Reference		kernel.org https://git.kernel.org/stable/c/174f62a0aa15c211e60208b41ee9e7cdfb73d455 [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/437e0fa907ba39b4d7eda863c03ea9cf48bd93a9 [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/5104fdf50d326db2c1a994f8b35dcd46e63ae4ad [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/6c1b3d89a2dda79881726bb6e37af19c0936d736 [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/820daf9ffe2b0afb804567b10983fb38bc5ae288 [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/ba3c0796d292de84f2932cc5bbb0f771fc720996 [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/bf2d51eedf03bd61e3556e35d74d49e2e6112398 [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/f475d5502f33a6c5b149b0afe96316ad1962a64a [No types assigned]