CVE-2024-26800Network attack vector

Remote memory corruption via TLS page double-release

Published Apr 4, 2024 · Updated Aug 5, 2026

Use-after-free in Linux kernel TLS software decryption allows remote attackers to corrupt kernel memory via crafted TLS records. The tls_decrypt_sg error path releases pages after tls_decrypt_done has already released them when a backlogged decryption returns an authentication error. An unauthenticated peer must reach a server socket using kTLS software receive processing and drive both crypto backlog saturation and a failed AEAD check; exploitation can disclose or modify kernel memory or panic the host.

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 Linux kernel TLS software decryption allows remote attackers to corrupt kernel memory via crafted TLS records. The tls_decrypt_sg error path releases pages after tls_decrypt_done has already released them when a backlogged decryption returns an authentication error. An unauthenticated peer must reach a server socket using kTLS software receive processing and drive both crypto backlog saturation and a failed AEAD check; exploitation can disclose or modify kernel memory or panic the host.

The record

CVE
CVE-2024-26800
Published
Apr 4, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 4, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=13eca403876bbea3716e82cdfe6f1e6febb38754 <81be85353b0f5a7b660635634b655329b429eefe
  2. Affected versionversion=3ade391adc584f17b5570fd205de3ad029090368
  3. Affected versionversion=5.15.160 <5.16
  4. Affected versionversion=6.6.18 <6.6.21
  5. Affected versionversion=6.7.6 <6.7.9
  6. Affected versionversion=8590541473188741055d27b955db0777569438e3 <13114dc5543069f7b97991e3b79937b6da05f5b0
  7. Affected versionversion=ab6397f072e5097f267abf5cb08a8004e6b17694 <1ac9fb84bc7ecd4bc6428118301d9d864d2a58d1
  8. Affected versionversion=cd1bbca03f3c1d845ce274c0d0a66de8e5929f72 <f2b85a4cc763841843de693bbd7308fe9a2c4c89

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=13eca403876bbea3716e82cdfe6f1e6febb38754 <81be85353b0f5a7b660635634b655329b429eefe; version=3ade391adc584f17b5570fd205de3ad029090368; version=5.15.160 <5.16; version=6.6.18 <6.6.21; version=6.7.6 <6.7.9; version=8590541473188741055d27b955db0777569438e3 <13114dc5543069f7b97991e3b79937b6da05f5b0; version=ab6397f072e5097f267abf5cb08a8004e6b17694 <1ac9fb84bc7ecd4bc6428118301d9d864d2a58d1; version=cd1bbca03f3c1d845ce274c0d0a66de8e5929f72 <f2b85a4cc763841843de693bbd7308fe9a2c4c89

Published CVSS scores

9.8LinuxCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.8National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/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-416Use After Free
T1190Exploit Public-Facing Application

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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