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CVE-2026-74448— drm/amdkfd: fix QID bit leak in pqm_create_queue()

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基金会开源的一个操作系统内核。 Linux kernel 6.6.151之前版本、6.12.103之前版本、6.18.44之前版本和7.1.8之前版本存在安全漏洞，该漏洞源于pqm_create_queue()函数错误处理不当，当MES启用且amdgpu_amdkfd_alloc_kernel_mem()失败时提前返回，未调用clear_bit，导致QID位泄漏，可能耗尽所有可用的队列槽。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 0f88894aa628680747ae27760e5f627f901a435f< 8924e2594a15bdbd07f8696770864366d787ab70 affected
c0ef1c8ef70bfa3487ea84f794d7a1f0fea0735d< 2ff5bb3645c72b3690e70c513a62a86600c4632f affected
fddc45026311c05a5355fd34b9dc0a1d7eaef4a2< 5f0f2ddeac738e2ca9d12cb76a1ff2904e85ecc3 affected
fddc45026311c05a5355fd34b9dc0a1d7eaef4a2< 7c35bf94150d872e670a6632aa819d320279effb affected
fddc45026311c05a5355fd34b9dc0a1d7eaef4a2< 38b73293f38658a4685ffcea666462024f858ad9 affected
9d61e2b81f5fc90c87975879809346e7c90ea5f9 affected
d86ba913bbfd1afafacbfb750001ffc6bfe29da0 affected
6.6.87< 6.6.151 affected
… +10 more rows
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I. Basic Information for CVE-2026-74448

Vulnerability Information
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Vulnerability Title
drm/amdkfd: fix QID bit leak in pqm_create_queue()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: fix QID bit leak in pqm_create_queue() When MES is enabled and amdgpu_amdkfd_alloc_kernel_mem() fails during the first queue creation for a process, pqm_create_queue() returns early via 'return retval' without going through the err_create_queue cleanup label. This means clear_bit(*qid, pqm->queue_slot_bitmap) is never called, leaving the reserved QID bit permanently set in queue_slot_bitmap. Over time this leaks QID slots, potentially exhausting all available queue slots. Fix this by replacing 'return retval' with 'goto err_allocate_pqn' so that clear_bit() is always called on the error path without touching the uninitialized pqn pointer. AILIKFD-813 (cherry picked from commit a107f74c38edbb80d6ab64dcaeeb292c14e9779f)
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基金会开源的一个操作系统内核。 Linux kernel 6.6.151之前版本、6.12.103之前版本、6.18.44之前版本和7.1.8之前版本存在安全漏洞，该漏洞源于pqm_create_queue()函数错误处理不当，当MES启用且amdgpu_amdkfd_alloc_kernel_mem()失败时提前返回，未调用clear_bit，导致QID位泄漏，可能耗尽所有可用的队列槽。
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 0f88894aa628680747ae27760e5f627f901a435f ~ 8924e2594a15bdbd07f8696770864366d787ab70 -
Linux Linux 6.15 -

II. Public POCs for CVE-2026-74448

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III. Intelligence Information for CVE-2026-74448

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Patches & Fixes for CVE-2026-74448 (5)

Same Patch Batch · Linux · 2026-08-15 · 845 CVEs total

CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
CVE-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-72339 9.8 CRITICAL qede: fix off-by-one in BD ring consumption on build_skb failure
CVE-2026-72234 9.8 CRITICAL batman-adv: access unicast_ttvn skb->data only after skb realloc
CVE-2026-74376 9.8 CRITICAL md/raid10: reset read_slot when reusing r10bio for discard
CVE-2026-74255 9.8 CRITICAL tipc: fix UAF in tipc_l2_send_msg()
CVE-2026-72064 9.8 CRITICAL net: mana: Sync page pool RX frags for CPU
CVE-2026-72065 9.8 CRITICAL net: mana: Validate the packet length reported by the NIC
CVE-2026-72217 9.8 CRITICAL SUNRPC: Bound-check xdr_buf_to_bvec() stores before writing
CVE-2026-74473 9.8 CRITICAL vxlan: use pskb_network_may_pull() in route_shortcircuit()
CVE-2026-72323 9.8 CRITICAL ipv4: igmp: Fix potential UAF in igmp_gq_start_timer()
CVE-2026-74495 9.8 CRITICAL igbvf: Fix leak in TX DMA error cleanup
CVE-2026-72463 9.8 CRITICAL xfrm: Fix dev use-after-free in xfrm async resumption
CVE-2026-72069 9.8 CRITICAL locking/rt: Fix the incorrect RCU protection in rt_spin_unlock()

Showing top 20 of 845 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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