CVE-2026-74280Network attack vector

Kernel crash via incorrect DMA cleanup index

Published Aug 15, 2026 · Updated Aug 15, 2026

Improper DMA cleanup in Linux 5.7 and later allows remote attackers to leak DMA mappings and crash affected OcteonTX systems. The sg_cleanup path in drivers/crypto/marvell/octeontx/otx_cptvf_reqmgr.c indexes list[i] instead of list[j], repeatedly unmapping the failed entry while leaving earlier mappings allocated. Reachability requires Marvell OcteonTX CPT hardware processing fragmented offloaded cryptographic traffic that causes a DMA-mapping failure; repeated triggers exhaust mappings or panic the kernel.

CVSS severity10.0
Critical
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper DMA cleanup in Linux 5.7 and later allows remote attackers to leak DMA mappings and crash affected OcteonTX systems. The sg_cleanup path in drivers/crypto/marvell/octeontx/otx_cptvf_reqmgr.c indexes list[i] instead of list[j], repeatedly unmapping the failed entry while leaving earlier mappings allocated. Reachability requires Marvell OcteonTX CPT hardware processing fragmented offloaded cryptographic traffic that causes a DMA-mapping failure; repeated triggers exhaust mappings or panic the kernel.

The record

CVE
CVE-2026-74280
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10b4f09491bfeb0b298cb2f49df585510ee6189a <5f99a396f706afc749448659d1565991330e4f71
  2. Affected versionversion=10b4f09491bfeb0b298cb2f49df585510ee6189a <6c721a3e43344f8560ee4ef506fc1f72b4646dcd
  3. Affected versionversion=10b4f09491bfeb0b298cb2f49df585510ee6189a <7891c64c0520519782470ba29bac8a5761e295d8
  4. Affected versionversion=10b4f09491bfeb0b298cb2f49df585510ee6189a <8a0db9fad3c97e6447a92417cb95d7c55eaa9530
  5. Affected versionversion=10b4f09491bfeb0b298cb2f49df585510ee6189a <8d301e5a51173ba56ce4f632a2a33bf6b14b0fcf
  6. Affected versionversion=10b4f09491bfeb0b298cb2f49df585510ee6189a <97f150ba3e372256eabb93bd80c2cf3740077fb5
  7. Affected versionversion=10b4f09491bfeb0b298cb2f49df585510ee6189a <acff30cfc0d72465b51b0bfdf019f1cb54e15314
  8. Affected versionversion=10b4f09491bfeb0b298cb2f49df585510ee6189a <ed374dbc70c10c4a864414b3d9c257faec8fd485
  9. Affected versionversion=5.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=10b4f09491bfeb0b298cb2f49df585510ee6189a <5f99a396f706afc749448659d1565991330e4f71; version=10b4f09491bfeb0b298cb2f49df585510ee6189a <6c721a3e43344f8560ee4ef506fc1f72b4646dcd; version=10b4f09491bfeb0b298cb2f49df585510ee6189a <7891c64c0520519782470ba29bac8a5761e295d8; version=10b4f09491bfeb0b298cb2f49df585510ee6189a <8a0db9fad3c97e6447a92417cb95d7c55eaa9530; version=10b4f09491bfeb0b298cb2f49df585510ee6189a <8d301e5a51173ba56ce4f632a2a33bf6b14b0fcf; version=10b4f09491bfeb0b298cb2f49df585510ee6189a <97f150ba3e372256eabb93bd80c2cf3740077fb5; version=10b4f09491bfeb0b298cb2f49df585510ee6189a <acff30cfc0d72465b51b0bfdf019f1cb54e15314; version=10b4f09491bfeb0b298cb2f49df585510ee6189a <ed374dbc70c10c4a864414b3d9c257faec8fd485; version=5.7

Published CVSS scores

10.0LinuxCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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