CVE-2026-72299Network attack vector

Kernel crash via unsafe TIPC queue dump

Published Aug 15, 2026 · Updated Aug 15, 2026

Use-after-free in the Linux kernel TIPC enqueue trace path allows remote attackers to crash the kernel through inbound TIPC traffic. TIPC_DUMP_ALL walks sk_receive_queue while tipc_sk_enqueue holds only the backlog spinlock, so a socket owner can concurrently dequeue and free a buffer that the trace code dereferences. Reachability requires active enqueue tracepoints and a user-owned destination socket; the stale access can panic the kernel and can expose or corrupt kernel memory.

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

Use-after-free in the Linux kernel TIPC enqueue trace path allows remote attackers to crash the kernel through inbound TIPC traffic. TIPC_DUMP_ALL walks sk_receive_queue while tipc_sk_enqueue holds only the backlog spinlock, so a socket owner can concurrently dequeue and free a buffer that the trace code dereferences. Reachability requires active enqueue tracepoints and a user-owned destination socket; the stale access can panic the kernel and can expose or corrupt kernel memory.

The record

CVE
CVE-2026-72299
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-825, T1210
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=01e661ebfbad40e6280fb8ec25f2861d39ba4387 <12876864f9de5fa6f611a30c6c17e405a773bf0a
  2. Affected versionversion=01e661ebfbad40e6280fb8ec25f2861d39ba4387 <61a55fa24a5d737436018764a647fe5b6cb36371
  3. Affected versionversion=01e661ebfbad40e6280fb8ec25f2861d39ba4387 <6acbbe54215d5f4251593000cff2bf51d6748713
  4. Affected versionversion=01e661ebfbad40e6280fb8ec25f2861d39ba4387 <acd7df8d955480a6f6e5bb809da67b1500cc3cf4
  5. Affected versionversion=01e661ebfbad40e6280fb8ec25f2861d39ba4387 <b9e100815f4b55e9ccaf6af9a3aba173eb13d381
  6. Affected versionversion=5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=01e661ebfbad40e6280fb8ec25f2861d39ba4387 <12876864f9de5fa6f611a30c6c17e405a773bf0a; version=01e661ebfbad40e6280fb8ec25f2861d39ba4387 <61a55fa24a5d737436018764a647fe5b6cb36371; version=01e661ebfbad40e6280fb8ec25f2861d39ba4387 <6acbbe54215d5f4251593000cff2bf51d6748713; version=01e661ebfbad40e6280fb8ec25f2861d39ba4387 <acd7df8d955480a6f6e5bb809da67b1500cc3cf4; version=01e661ebfbad40e6280fb8ec25f2861d39ba4387 <b9e100815f4b55e9ccaf6af9a3aba173eb13d381; version=5.0

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
9.8LinuxCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.6Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:L

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-825Expired Pointer Dereference
T1210Exploitation of Remote Services

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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