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CVE-2024-36969— drm/amd/display: Fix division by zero in setup_dsc_config

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于drm/amd/display 中存在安全问题，可能导致驱动程序崩溃。

AI Predicted 4.4 Difficulty: Trivial EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c< a32c8f951c8a456c1c251e1dcdf21787f8066445 affected
4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c< 91402e0e5de9124a3108db7a14163fcf9a6d322f affected
4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c< 7e4f50dfc98c49b3dc6875a35c3112522fb25639 affected
4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c< f187fcbbb8f8bf10c6687f0beae22509369f7563 affected
4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c< 308de6be0c9c7ba36915c0d398e771725c0ea911 affected
4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c< 130afc8a886183a94cf6eab7d24f300014ff87ba affected
4.15 affected
< 4.15 unaffected
… +6 more rows
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I. Basic Information for CVE-2024-36969

Vulnerability Information
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Vulnerability Title
drm/amd/display: Fix division by zero in setup_dsc_config
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix division by zero in setup_dsc_config When slice_height is 0, the division by slice_height in the calculation of the number of slices will cause a division by zero driver crash. This leaves the kernel in a state that requires a reboot. This patch adds a check to avoid the division by zero. The stack trace below is for the 6.8.4 Kernel. I reproduced the issue on a Z16 Gen 2 Lenovo Thinkpad with a Apple Studio Display monitor connected via Thunderbolt. The amdgpu driver crashed with this exception when I rebooted the system with the monitor connected. kernel: ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) kernel: ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) kernel: ? setup_dsc_config (drivers/gpu/drm/amd/amdgpu/../display/dc/dsc/dc_dsc.c:1053) amdgpu kernel: ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) kernel: ? setup_dsc_config (drivers/gpu/drm/amd/amdgpu/../display/dc/dsc/dc_dsc.c:1053) amdgpu kernel: ? exc_divide_error (arch/x86/kernel/traps.c:194 (discriminator 2)) kernel: ? setup_dsc_config (drivers/gpu/drm/amd/amdgpu/../display/dc/dsc/dc_dsc.c:1053) amdgpu kernel: ? asm_exc_divide_error (./arch/x86/include/asm/idtentry.h:548) kernel: ? setup_dsc_config (drivers/gpu/drm/amd/amdgpu/../display/dc/dsc/dc_dsc.c:1053) amdgpu kernel: dc_dsc_compute_config (drivers/gpu/drm/amd/amdgpu/../display/dc/dsc/dc_dsc.c:1109) amdgpu After applying this patch, the driver no longer crashes when the monitor is connected and the system is rebooted. I believe this is the same issue reported for 3113.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于drm/amd/display 中存在安全问题，可能导致驱动程序崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c ~ a32c8f951c8a456c1c251e1dcdf21787f8066445 -
Linux Linux 4.15 -

II. Public POCs for CVE-2024-36969

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III. Intelligence Information for CVE-2024-36969

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Other References for CVE-2024-36969 (6)

Same Patch Batch · Linux · 2024-06-08 · 6 CVEs total

CVE-2024-36965 7.8 HIGH remoteproc: mediatek: Make sure IPI buffer fits in L2TCM
CVE-2024-36968 7.6 HIGH Bluetooth: L2CAP: Fix div-by-zero in l2cap_le_flowctl_init()
CVE-2024-36966 erofs: reliably distinguish block based and fscache mode
CVE-2024-36967 KEYS: trusted: Fix memory leak in tpm2_key_encode()
CVE-2024-36970 wifi: iwlwifi: Use request_module_nowait

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-36969

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