CVE-2026-97953Hinoki check available

TX ring corruption via descriptor undercount

Published Sep 25, 2026 · Updated Sep 25, 2026

Memory corruption in the stmmac TSO path in Linux 4.7 and later allows attackers to corrupt the TX descriptor ring with fragmented packets. stmmac_tso_xmit() undercounts required descriptors because stmmac_tso_allocator() maps each fragment separately, then writes beyond the available ring slots. Reachability requires stmmac TSO on supported Synopsys Ethernet hardware and a highly fragmented TSO packet; the published patch establishes TX-ring corruption but no crash or broader impact.

CVSS severityUnavailable
Unscored
EPSS probability0.41%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Memory corruption in the stmmac TSO path in Linux 4.7 and later allows attackers to corrupt the TX descriptor ring with fragmented packets. stmmac_tso_xmit() undercounts required descriptors because stmmac_tso_allocator() maps each fragment separately, then writes beyond the available ring slots. Reachability requires stmmac TSO on supported Synopsys Ethernet hardware and a highly fragmented TSO packet; the published patch establishes TX-ring corruption but no crash or broader impact.

The record

CVE
CVE-2026-97953
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 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?

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  1. Affected versionversion=4.7
  2. Affected versionversion=f748be531d7012c456b97f66091d86b3675c5fef <5e38d732ec67a5b1f9a56e6c73add480c4b6030a
  3. Affected versionversion=f748be531d7012c456b97f66091d86b3675c5fef <65820fc743eae322f7f94f6a64d07861211d4b21
  4. Affected versionversion=f748be531d7012c456b97f66091d86b3675c5fef <c28175220f808c867d5618de8ecc6dbcc815c773
  5. Affected versionversion=f748be531d7012c456b97f66091d86b3675c5fef <ffa6d2481bc1c87f822ecd626561484e4ee24cef

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.7; version=f748be531d7012c456b97f66091d86b3675c5fef <5e38d732ec67a5b1f9a56e6c73add480c4b6030a; version=f748be531d7012c456b97f66091d86b3675c5fef <65820fc743eae322f7f94f6a64d07861211d4b21; version=f748be531d7012c456b97f66091d86b3675c5fef <c28175220f808c867d5618de8ecc6dbcc815c773; version=f748be531d7012c456b97f66091d86b3675c5fef <ffa6d2481bc1c87f822ecd626561484e4ee24cef

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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