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CVE-2024-46850— drm/amd/display: Avoid race between dcn35_set_drr() and dc_state_destruct()

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dcn35_set_drr函数和dc_state_destruct函数之间存在竞争。

CVSS 7.8 · High EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Linux 06ad7e16425619a4a77154c2e85bededb3e04a4f< 42850927656a540428e58d370b3c1599a617bac7 affected
06ad7e16425619a4a77154c2e85bededb3e04a4f< e835d5144f5ef78e4f8828c63e2f0d61144f283a affected
6.7 affected
< 6.7 unaffected
6.10.11≤ 6.10.* unaffected
6.11≤ * unaffected
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I. Basic Information for CVE-2024-46850

Vulnerability Information
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Vulnerability Title
drm/amd/display: Avoid race between dcn35_set_drr() and dc_state_destruct()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Avoid race between dcn35_set_drr() and dc_state_destruct() dc_state_destruct() nulls the resource context of the DC state. The pipe context passed to dcn35_set_drr() is a member of this resource context. If dc_state_destruct() is called parallel to the IRQ processing (which calls dcn35_set_drr() at some point), we can end up using already nulled function callback fields of struct stream_resource. The logic in dcn35_set_drr() already tries to avoid this, by checking tg against NULL. But if the nulling happens exactly after the NULL check and before the next access, then we get a race. Avoid this by copying tg first to a local variable, and then use this variable for all the operations. This should work, as long as nobody frees the resource pool where the timing generators live. (cherry picked from commit 0607a50c004798a96e62c089a4c34c220179dcb5)
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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dcn35_set_drr函数和dc_state_destruct函数之间存在竞争。
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 06ad7e16425619a4a77154c2e85bededb3e04a4f ~ 42850927656a540428e58d370b3c1599a617bac7 -
Linux Linux 6.7 -

II. Public POCs for CVE-2024-46850

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III. Intelligence Information for CVE-2024-46850

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Other References for CVE-2024-46850 (2)

Same Patch Batch · Linux · 2024-09-27 · 66 CVEs total

CVE-2024-46865 9.8 CRITICAL fou: fix initialization of grc
CVE-2024-46823 8.4 HIGH kunit/overflow: Fix UB in overflow_allocation_test
CVE-2024-46831 8.4 HIGH net: microchip: vcap: Fix use-after-free error in kunit test
CVE-2024-46858 8.1 HIGH mptcp: pm: Fix uaf in __timer_delete_sync
CVE-2024-46862 8.0 HIGH ASoC: Intel: soc-acpi-intel-mtl-match: add missing empty item
CVE-2024-46866 7.8 HIGH drm/xe/client: add missing bo locking in show_meminfo()
CVE-2024-46812 7.8 HIGH drm/amd/display: Skip inactive planes within ModeSupportAndSystemConfiguration
CVE-2024-46813 7.8 HIGH drm/amd/display: Check link_index before accessing dc->links[]
CVE-2024-46816 7.8 HIGH drm/amd/display: Stop amdgpu_dm initialize when link nums greater than max_links
CVE-2024-46818 7.8 HIGH drm/amd/display: Check gpio_id before used as array index
CVE-2024-46830 7.8 HIGH KVM: x86: Acquire kvm->srcu when handling KVM_SET_VCPU_EVENTS
CVE-2024-46834 7.8 HIGH ethtool: fail closed if we can't get max channel used in indirection tables
CVE-2024-46842 7.8 HIGH scsi: lpfc: Handle mailbox timeouts in lpfc_get_sfp_info
CVE-2024-46845 7.8 HIGH tracing/timerlat: Only clear timer if a kthread exists
CVE-2024-46847 7.8 HIGH mm: vmalloc: ensure vmap_block is initialised before adding to queue
CVE-2024-46852 7.8 HIGH dma-buf: heaps: Fix off-by-one in CMA heap fault handler
CVE-2024-46859 7.8 HIGH platform/x86: panasonic-laptop: Fix SINF array out of bounds accesses
CVE-2024-46803 7.8 HIGH drm/amdkfd: Check debug trap enable before write dbg_ev_file
CVE-2024-46855 7.5 HIGH netfilter: nft_socket: fix sk refcount leaks
CVE-2024-46817 7.4 HIGH drm/amd/display: Stop amdgpu_dm initialize when stream nums greater than 6

Showing top 20 of 66 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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