CVE-2024-26585Network attack vector

Kernel memory corruption via kTLS completion race

Published Feb 21, 2024 · Updated Aug 5, 2026

Race condition in the Linux kernel kTLS transmit path allows remote attackers to corrupt kernel memory via crafted TLS traffic. tls_encrypt_done schedules transmit work after signaling async-crypto completion, allowing sendmsg or recvmsg teardown to free the TLS context first. A kTLS-terminating server and an attacker-controlled timing window are required; stale work can corrupt slab or timer-wheel state and panic the kernel.

CVSS severity9.8
Critical
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Linux kernel kTLS transmit path allows remote attackers to corrupt kernel memory via crafted TLS traffic. tls_encrypt_done schedules transmit work after signaling async-crypto completion, allowing sendmsg or recvmsg teardown to free the TLS context first. A kTLS-terminating server and an attacker-controlled timing window are required; stale work can corrupt slab or timer-wheel state and panic the kernel.

The record

CVE
CVE-2024-26585
Published
Feb 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 21, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.20
  2. Affected versionversion=a42055e8d2c30d4decfc13ce943d09c7b9dad221 <196f198ca6fce04ba6ce262f5a0e4d567d7d219d
  3. Affected versionversion=a42055e8d2c30d4decfc13ce943d09c7b9dad221 <6db22d6c7a6dc914b12c0469b94eb639b6a8a146
  4. Affected versionversion=a42055e8d2c30d4decfc13ce943d09c7b9dad221 <dd32621f19243f89ce830919496a5dcc2158aa33
  5. Affected versionversion=a42055e8d2c30d4decfc13ce943d09c7b9dad221 <e01e3934a1b2d122919f73bc6ddbe1cdafc4bbdb
  6. Affected versionversion=a42055e8d2c30d4decfc13ce943d09c7b9dad221 <e327ed60bff4a991cd7a709c47c4f0c5b4a4fd57

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.20; version=a42055e8d2c30d4decfc13ce943d09c7b9dad221 <196f198ca6fce04ba6ce262f5a0e4d567d7d219d; version=a42055e8d2c30d4decfc13ce943d09c7b9dad221 <6db22d6c7a6dc914b12c0469b94eb639b6a8a146; version=a42055e8d2c30d4decfc13ce943d09c7b9dad221 <dd32621f19243f89ce830919496a5dcc2158aa33; version=a42055e8d2c30d4decfc13ce943d09c7b9dad221 <e01e3934a1b2d122919f73bc6ddbe1cdafc4bbdb; version=a42055e8d2c30d4decfc13ce943d09c7b9dad221 <e327ed60bff4a991cd7a709c47c4f0c5b4a4fd57

Published CVSS scores

9.8Linux CNACVSS:3.1/AV:N/AC:L/PR:N/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

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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