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CVE-2026-74732— drm/amd/display: Check for tg ops in dce110_set_avmute

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.

在 Linux 内核中，已修复以下漏洞： drm/amd/display：在 dce110_set_avmute 中检查 tg 操作函数 部分较旧的 DCE（Display Controller Engine）时序发生器在其操作函数表中未实现 is_tg_enabled 函数。当在 HDMI 关闭显示器过程中无条件调用该函数以等待 AV mute 帧时，会导致在 Southern Islands 架构的离散 GPU（dGPU）上发生空指针解引用错误。 因此，在等待帧之前，需先检查时序发生器（tg）及其所需的操作函数

AI Predicted 5.5 Difficulty: Moderate EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1207 · Rogue Domain Controller

Affected Version Matrix 11

VendorProduct Version RangeStatus
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 853c2d31408bd45dcf92d0eb1f06eb439a56cf04 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< d089f32d34f821c8f0ef23d5fcd77bd43c1b3b92 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 5edbb409b0bc5001195f4b7cfca19122361211a1 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 3141e3d61469bba2624a91c5e2407f110b33b29e affected
< 6.12.104 affected
< 6.18.45 affected
< 7.1.9 affected
6.12.104≤ 6.12.* unaffected
… +3 more rows
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I. Basic Information for CVE-2026-74732

Vulnerability Information
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Vulnerability Title
drm/amd/display: Check for tg ops in dce110_set_avmute
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Check for tg ops in dce110_set_avmute Some older DCE timing generators do not implement is_tg_enabled in their ops table. Calling it unconditionally when waiting for AV mute frames causes a NULL pointer dereference on Southern Islands dGPUs when turning the display off over HDMI. Check that tg and the required ops exist before waiting for frames. (cherry picked from commit 2686a0c0aaa07bec2e24131835cf27b5fd4935a5)
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ 853c2d31408bd45dcf92d0eb1f06eb439a56cf04 -
Linux Linux 6.12.104 ~ 6.12.* -

II. Public POCs for CVE-2026-74732

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III. Intelligence Information for CVE-2026-74732

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Patches & Fixes for CVE-2026-74732 (4)

Same Patch Batch · Linux · 2026-08-22 · 150 CVEs total

CVE-2026-74638 drm/v3d: Serialize the scheduler timeout handlers
CVE-2026-74621 net/sched: act_ct: fix sk_buff leak when the header checks reject a packet
CVE-2026-74622 net: atlantic: free RX pages of consumed but not refilled buffers
CVE-2026-74623 net: atlantic: free stranded TX buffers on ring deinit
CVE-2026-74624 netfilter: nf_conntrack: defer invalid log until after unlock
CVE-2026-74625 netfilter: bridge: release template ct on non-IP path
CVE-2026-74627 net: devmem: prevent net-iov / page mixing
CVE-2026-74626 NTB: ntb_netdev: Preserve RX queue depth on allocation failure
CVE-2026-74628 net/x25: fix use-after-free of the socket by its timers
CVE-2026-74629 net/dibs: Correct freeing of dmb_clientid_arr
CVE-2026-74631 net: smc: fix splice entry lifetime imbalance in smc_rx_splice
CVE-2026-74630 ipv6: prevent in6_dev_get() from resurrecting inet6_dev
CVE-2026-74632 mm/huge_memory: fix huge_zero_pfn race
CVE-2026-74633 tracing: Fix NULL pointer dereference in module event cache removal
CVE-2026-74634 ring-buffer: Prevent subbuf order change when resizing is disabled
CVE-2026-74635 fbdev: bitblit: bound-check glyph index in bit_cursor()
CVE-2026-74636 tracing: Fix race between update_event_fields and, event_define_fields
CVE-2026-74637 perf/core: Fix group leader use-after-free after sibling detach
CVE-2026-74639 ALSA: us144mkii: re-anchor capture URBs on resubmission
CVE-2026-74650 staging: rtl8723bs: fix OOB read in WMM_param_handler()

Showing top 20 of 150 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-74732

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