Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-93040— dmaengine: dw-edma: Serialize channel state checks

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，以下漏洞已得到解决： dmaengine: dw-edma: 串行化通道状态检查 和 在读取和更新通道状态时未持有 ，而中断处理程序在持有该锁的情况下更新相同的状态。因此，在这些状态检查周围也加上同样的锁，以确保 （请求）、 （状态）和 （已配置）标志保持一致性。 例如， 可能在 状态下观测到通道，紧接着中断处理程序完成最后一个描述符并将通道状态迁移至 ，随后 在已空闲的通道上记录 请求。此后将不再有中断来确认该请求，且由于 要求通道处于 状态，该通道将永久卡死： 会遗留过期的请求，因此即使

AI Predicted 5.5 Difficulty: Moderate EPSS 0.22% · P11

Possible ATT&CK Techniques 1 AI

T1020 · Automated Exfiltration

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf< be0072af8ce6e9458cc586e0e8b41a251e7d4316 affected
e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf< 2d76b91deeab973dd8a8c2ee587ce27f881de768 affected
e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf< 3001cfcee30dcc81f8b3774319c12067f126e49a affected
e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf< b6293a8a38f4d5866ce1a264c138265a02e4c53a affected
e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf< da16a02f0998a0d455ce6265b836b29ad92e6e58 affected
e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf< fe0ffa0190e862ed71e8c1a476090f648c9cb7d9 affected
e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf< 6fc436e1500c5e4f0dde2a3dbadf6d898057be8f affected
e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf< f7d1619f3e10c619b62c6cd6d95371b5c526c85a affected
… +10 more rows
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-93040

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
dmaengine: dw-edma: Serialize channel state checks
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: dmaengine: dw-edma: Serialize channel state checks pause() and resume() read and update channel state without holding vc.lock, while the interrupt handlers update the same state under it. Take the same lock around those state checks so that request, status, and configured stay consistent. For example, pause() can observe EDMA_ST_BUSY right before the interrupt handler completes the final descriptor and moves the channel to EDMA_ST_IDLE, and then record EDMA_REQ_PAUSE on an already idle channel. No further interrupt will acknowledge the request, and since issue_pending() requires EDMA_REQ_NONE, the channel is wedged for good: terminate_all() leaves the stale request behind, so even reconfiguring the channel does not recover it. issue_pending() already runs under vc.lock, but it tests configured before taking it. Move that test under the lock as well, so configured, request, and status are evaluated as one channel-state snapshot.
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 e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf ~ be0072af8ce6e9458cc586e0e8b41a251e7d4316 -
Linux Linux 5.3 -

II. Public POCs for CVE-2026-93040

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-93040

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-93040 (8)

Same Patch Batch · Linux · 2026-09-17 · 600 CVEs total

CVE-2026-92489 9.8 CRITICAL xfrm: Fix skb double-free in xfrm_dev_direct_output()
CVE-2026-90235 9.8 CRITICAL sunrpc: xprtsock: annotate shared socket callbacks with READ_ONCE/WRITE_ONCE
CVE-2026-90173 9.8 CRITICAL smb: smbdirect: free completion queues with ib_free_cq()
CVE-2026-90104 9.8 CRITICAL NFSv4.1: zero referring call lists before decoding
CVE-2026-90151 9.8 CRITICAL NFSv4: remove callback IDR entry on client allocation failure
CVE-2026-90110 9.4 CRITICAL inetpeer: randomize RB-tree node comparison using SipHash
CVE-2026-90230 9.1 CRITICAL nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate()
CVE-2026-90414 9.1 CRITICAL IB/isert: reject PDUs declaring more data than was received
CVE-2026-90413 9.1 CRITICAL IB/isert: reject login PDUs declaring more data than was received
CVE-2026-90367 8.8 HIGH wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER
CVE-2026-90329 8.8 HIGH HID: synchronize input before cleaning up a failed probe
CVE-2026-93189 8.8 HIGH HID: core: quiesce input in hid_hw_stop() to prevent use-after-free
CVE-2026-90240 8.8 HIGH iommu/vt-d: Flush context cache with correct SID when tearing down aliases
CVE-2026-90357 8.8 HIGH wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement
CVE-2026-90286 8.8 HIGH drm/amdgpu/gfx6: Use PFP on the compute queues too
CVE-2026-93042 8.8 HIGH dmaengine: dw-edma: Terminate all descriptors without callbacks
CVE-2026-90256 8.8 HIGH Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind
CVE-2026-90380 8.8 HIGH wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete
CVE-2026-90381 8.8 HIGH wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx()
CVE-2026-90425 8.8 HIGH iommu/tegra241-cmdqv: Require exactly one Stream ID for a vSID

Showing top 20 of 600 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-93040

No comments yet

Leave a comment