CVE-2026-74281Network attack vector

Service interruption via inverted TIPC peer ranges

Published Aug 15, 2026 · Updated Aug 15, 2026

Resource exhaustion in affected Linux kernels allows remote attackers acting as TIPC peers to interrupt service via crafted publications. tipc_update_nametbl() accepts wire-supplied bounds without rejecting lower > upper, creating unreachable rbtree entries that cannot be withdrawn. An established peer can repeat these unauthenticated PUBLICATION messages without a per-peer cap, leaking kernel memory for the namespace lifetime until availability is exhausted.

CVSS severity7.5
High
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in affected Linux kernels allows remote attackers acting as TIPC peers to interrupt service via crafted publications. tipc_update_nametbl() accepts wire-supplied bounds without rejecting lower > upper, creating unreachable rbtree entries that cannot be withdrawn. An established peer can repeat these unauthenticated PUBLICATION messages without a per-peer cap, leaking kernel memory for the namespace lifetime until availability is exhausted.

The record

CVE
CVE-2026-74281
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-772, 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=37922ea4a3105176357c8d565a9d982c4a08714a <2afb648f7b99216c687db1f89739c995e1144153
  2. Affected versionversion=37922ea4a3105176357c8d565a9d982c4a08714a <581ef56e5c34d475056ce086dc2ba0e872ba6857
  3. Affected versionversion=37922ea4a3105176357c8d565a9d982c4a08714a <7e401233f9bb74a626e70698d0d62f3a94ac0676
  4. Affected versionversion=37922ea4a3105176357c8d565a9d982c4a08714a <973bf0ed896b9898668dbadb82ed849d7d573010
  5. Affected versionversion=37922ea4a3105176357c8d565a9d982c4a08714a <cd1955f81bd8ebeef51b324989ac871ad1947fb6
  6. Affected versionversion=37922ea4a3105176357c8d565a9d982c4a08714a <f1715d92ee3095d9215b493a8603a81f646fcf61
  7. Affected versionversion=37922ea4a3105176357c8d565a9d982c4a08714a <f683200b83a0085d4e11abea8c1fdd9fdfb95b0b
  8. Affected versionversion=4.17

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=37922ea4a3105176357c8d565a9d982c4a08714a <2afb648f7b99216c687db1f89739c995e1144153; version=37922ea4a3105176357c8d565a9d982c4a08714a <581ef56e5c34d475056ce086dc2ba0e872ba6857; version=37922ea4a3105176357c8d565a9d982c4a08714a <7e401233f9bb74a626e70698d0d62f3a94ac0676; version=37922ea4a3105176357c8d565a9d982c4a08714a <973bf0ed896b9898668dbadb82ed849d7d573010; version=37922ea4a3105176357c8d565a9d982c4a08714a <cd1955f81bd8ebeef51b324989ac871ad1947fb6; version=37922ea4a3105176357c8d565a9d982c4a08714a <f1715d92ee3095d9215b493a8603a81f646fcf61; version=37922ea4a3105176357c8d565a9d982c4a08714a <f683200b83a0085d4e11abea8c1fdd9fdfb95b0b; version=4.17

Published CVSS scores

7.5CVE ProgramCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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

CWE-772Missing Release of Resource after Effective Lifetime
T1499.004Application or System Exploitation

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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