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CVE-2025-38515— drm/sched: Increment job count before swapping tail spsc 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调度器在交换尾部SPSC队列前未增加作业计数，可能导致DMA栅栏挂起。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1571 · Non-Standard Port

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 27105db6c63a571b91d01e749d026105a1e63bcf< 549a9c78c3ea6807d0dc4162a4f5ba59f217d5a0 affected
27105db6c63a571b91d01e749d026105a1e63bcf< e62f51d0ec8a9baf324caf9a564f8e318d36a551 affected
27105db6c63a571b91d01e749d026105a1e63bcf< ef841f8e4e1ff67817ca899bedc5ebb00847c0a7 affected
27105db6c63a571b91d01e749d026105a1e63bcf< f9a4f28a4fc4ee453a92a9abbe36e26224d17749 affected
27105db6c63a571b91d01e749d026105a1e63bcf< c64f5310530baf75328292f9b9f3f2961d185183 affected
27105db6c63a571b91d01e749d026105a1e63bcf< e2d6547dc8b9b332f9bc00875197287a6a4db65a affected
27105db6c63a571b91d01e749d026105a1e63bcf< ef58a95457466849fa7b31fd3953801a5af0f58b affected
27105db6c63a571b91d01e749d026105a1e63bcf< 8af39ec5cf2be522c8eb43a3d8005ed59e4daaee affected
… +10 more rows
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I. Basic Information for CVE-2025-38515

Vulnerability Information
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Vulnerability Title
drm/sched: Increment job count before swapping tail spsc queue
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/sched: Increment job count before swapping tail spsc queue A small race exists between spsc_queue_push and the run-job worker, in which spsc_queue_push may return not-first while the run-job worker has already idled due to the job count being zero. If this race occurs, job scheduling stops, leading to hangs while waiting on the job’s DMA fences. Seal this race by incrementing the job count before appending to the SPSC queue. This race was observed on a drm-tip 6.16-rc1 build with the Xe driver in an SVM test case.
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调度器在交换尾部SPSC队列前未增加作业计数，可能导致DMA栅栏挂起。
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 27105db6c63a571b91d01e749d026105a1e63bcf ~ 549a9c78c3ea6807d0dc4162a4f5ba59f217d5a0 -
Linux Linux 4.16 -

II. Public POCs for CVE-2025-38515

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III. Intelligence Information for CVE-2025-38515

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Same Patch Batch · Linux · 2025-08-16 · 59 CVEs total

CVE-2025-38527 9.8 CRITICAL smb: client: fix use-after-free in cifs_oplock_break
CVE-2025-38533 9.8 CRITICAL net: libwx: fix the using of Rx buffer DMA
CVE-2025-38552 9.4 CRITICAL mptcp: plug races between subflow fail and subflow creation
CVE-2023-3867 9.1 CRITICAL ksmbd: fix out of bounds read in smb2_sess_setup
CVE-2023-4515 9.1 CRITICAL ksmbd: validate command request size
CVE-2023-32249 9.1 CRITICAL ksmbd: not allow guest user on multichannel
CVE-2025-38512 8.8 HIGH wifi: prevent A-MSDU attacks in mesh networks
CVE-2025-38511 8.8 HIGH drm/xe/pf: Clear all LMTT pages on alloc
CVE-2023-4130 8.1 HIGH ksmbd: fix wrong next length validation of ea buffer in smb2_set_ea()
CVE-2023-3865 8.1 HIGH ksmbd: fix out-of-bound read in smb2_write
CVE-2025-38539 7.8 HIGH tracing: Add down_write(trace_event_sem) when adding trace event
CVE-2025-38532 7.8 HIGH net: libwx: properly reset Rx ring descriptor
CVE-2025-38542 7.8 HIGH net: appletalk: Fix device refcount leak in atrtr_create()
CVE-2025-38536 7.8 HIGH net: airoha: fix potential use-after-free in airoha_npu_get()
CVE-2025-38502 7.8 HIGH bpf: Fix oob access in cgroup local storage
CVE-2025-38550 7.8 HIGH ipv6: mcast: Delay put pmc->idev in mld_del_delrec()
CVE-2025-38514 7.5 HIGH rxrpc: Fix oops due to non-existence of prealloc backlog struct
CVE-2025-38501 7.5 HIGH ksmbd: limit repeated connections from clients with the same IP
CVE-2025-38524 7.5 HIGH rxrpc: Fix recv-recv race of completed call
CVE-2025-38526 7.5 HIGH ice: add NULL check in eswitch lag check

Showing top 20 of 59 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-38515

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