CVE-2026-80981Network attack vectorHinoki check available

Kernel crash via freed SMC LLC queue entry

Published Sep 11, 2026 · Updated Sep 11, 2026

Use-after-free in Linux kernel 6.14 allows remote attackers to crash the system through an SMC-Rv2 ADD_LINK exchange. smc_llc_srv_add_link() frees the LLC queue entry before smc_llc_save_add_link_rkeys() reads add_llc when no shared v2 receive buffer exists. Reachability requires SMC-Rv2 link addition on a device with max_recv_sge equal to 1; the demonstrated consequence is a kernel memory-safety fault and system crash.

CVSS severityUnavailable
Unscored
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Use-after-free in Linux kernel 6.14 allows remote attackers to crash the system through an SMC-Rv2 ADD_LINK exchange. smc_llc_srv_add_link() frees the LLC queue entry before smc_llc_save_add_link_rkeys() reads add_llc when no shared v2 receive buffer exists. Reachability requires SMC-Rv2 link addition on a device with max_recv_sge equal to 1; the demonstrated consequence is a kernel memory-safety fault and system crash.

The record

CVE
CVE-2026-80981
Published
Sep 11, 2026
Updated
Sep 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 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=27ef6a9981fe74191849966a6d5e0400a4008ab8 <a42a459ef0e54cb0c4b3e43e21cb0e658e664f64
  2. Affected versionversion=27ef6a9981fe74191849966a6d5e0400a4008ab8 <adef84cc85d449ac28d2b4b4c49cf19619c56e27
  3. Affected versionversion=27ef6a9981fe74191849966a6d5e0400a4008ab8 <c52a998a223e7e84333306996edec096178d1e95
  4. Affected versionversion=6.14

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=27ef6a9981fe74191849966a6d5e0400a4008ab8 <a42a459ef0e54cb0c4b3e43e21cb0e658e664f64; version=27ef6a9981fe74191849966a6d5e0400a4008ab8 <adef84cc85d449ac28d2b4b4c49cf19619c56e27; version=27ef6a9981fe74191849966a6d5e0400a4008ab8 <c52a998a223e7e84333306996edec096178d1e95; version=6.14

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.

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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
PrivilegesUnavailable
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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