CVE-2026-72339Network attack vector

Kernel crash via qede ring desynchronization

Published Aug 15, 2026 · Updated Aug 15, 2026

Off-by-one buffer handling in the Linux qede driver from 4.18 allows remote attackers to crash the system via network traffic. qede_rx_build_skb() and qede_tpa_rx_build_skb() consume a buffer descriptor when qede_build_skb() returns NULL, after which their callers recycle additional descriptors and desynchronize the ring. Reachability requires qede receive processing plus an allocation failure under memory pressure; corrupted DMA page references can damage the SLUB freelist and interrupt the system.

CVSS severity9.8
Critical
EPSS probability0.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Off-by-one buffer handling in the Linux qede driver from 4.18 allows remote attackers to crash the system via network traffic. qede_rx_build_skb() and qede_tpa_rx_build_skb() consume a buffer descriptor when qede_build_skb() returns NULL, after which their callers recycle additional descriptors and desynchronize the ring. Reachability requires qede receive processing plus an allocation failure under memory pressure; corrupted DMA page references can damage the SLUB freelist and interrupt the system.

The record

CVE
CVE-2026-72339
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-193, T1499
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=4.18
  2. Affected versionversion=8a8633978b842c88fbcfe00d4e5dde96048f630e <07be8b8adf91b7ada4c3dacce064d572a6066421
  3. Affected versionversion=8a8633978b842c88fbcfe00d4e5dde96048f630e <0bf78df2d3ecb1f4964ff42a7327d25845955153
  4. Affected versionversion=8a8633978b842c88fbcfe00d4e5dde96048f630e <1624aa100c0b218181aa74e3696a389b509298cb
  5. Affected versionversion=8a8633978b842c88fbcfe00d4e5dde96048f630e <814a5edac8c9fc04051808d5faaa93768e989281
  6. Affected versionversion=8a8633978b842c88fbcfe00d4e5dde96048f630e <982d6d6bc059c5dff37a2201c2f08c14bcfcbd20
  7. Affected versionversion=8a8633978b842c88fbcfe00d4e5dde96048f630e <a0a558ca7e75b49e71f8c545c30e8c005e6e4e2f
  8. Affected versionversion=8a8633978b842c88fbcfe00d4e5dde96048f630e <b066420e57f3402a52c998678b4678252ac9bb63
  9. Affected versionversion=8a8633978b842c88fbcfe00d4e5dde96048f630e <ecc05d4b20220a09c9c69584fc46ca55248a374a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.18; version=8a8633978b842c88fbcfe00d4e5dde96048f630e <07be8b8adf91b7ada4c3dacce064d572a6066421; version=8a8633978b842c88fbcfe00d4e5dde96048f630e <0bf78df2d3ecb1f4964ff42a7327d25845955153; version=8a8633978b842c88fbcfe00d4e5dde96048f630e <1624aa100c0b218181aa74e3696a389b509298cb; version=8a8633978b842c88fbcfe00d4e5dde96048f630e <814a5edac8c9fc04051808d5faaa93768e989281; version=8a8633978b842c88fbcfe00d4e5dde96048f630e <982d6d6bc059c5dff37a2201c2f08c14bcfcbd20; version=8a8633978b842c88fbcfe00d4e5dde96048f630e <a0a558ca7e75b49e71f8c545c30e8c005e6e4e2f; version=8a8633978b842c88fbcfe00d4e5dde96048f630e <b066420e57f3402a52c998678b4678252ac9bb63; version=8a8633978b842c88fbcfe00d4e5dde96048f630e <ecc05d4b20220a09c9c69584fc46ca55248a374a

Published CVSS scores

9.8CVE.orgCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.0Red HatCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

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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

CWE-193Off-by-one Error
T1499Endpoint Denial of Service

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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