CVE-2025-38616Hinoki check available

Kernel memory disclosure via freed receive-queue anchor

Published Aug 22, 2025 · Updated Aug 27, 2026

Out-of-bounds read in Linux kTLS allows local users to disclose kernel memory by consuming a socket receive queue. The receive parser can retain an anchor to a freed socket buffer when an out-of-band reader removes data beneath the TLS ULP, then decrypt up to a record length beyond valid data. An unprivileged local process can deterministically trigger the path on its own established socket, enabling kernel-memory disclosure, stream corruption, or a kernel panic.

CVSS severity7.8
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Out-of-bounds read in Linux kTLS allows local users to disclose kernel memory by consuming a socket receive queue. The receive parser can retain an anchor to a freed socket buffer when an out-of-band reader removes data beneath the TLS ULP, then decrypt up to a record length beyond valid data. An unprivileged local process can deterministically trigger the path on its own established socket, enabling kernel-memory disclosure, stream corruption, or a kernel panic.

The record

CVE
CVE-2025-38616
Published
Aug 22, 2025
Updated
Aug 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 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=6.0
  2. Affected versionversion=84c61fe1a75b4255df1e1e7c054c9e6d048da417 <2fb97ed9e2672b4f6e24ce206ac1a875ce4bcb38
  3. Affected versionversion=84c61fe1a75b4255df1e1e7c054c9e6d048da417 <6db015fc4b5d5f63a64a193f65d98da3a7fc811d
  4. Affected versionversion=84c61fe1a75b4255df1e1e7c054c9e6d048da417 <db3658a12d5ec4db7185ae7476151a50521b7207
  5. Affected versionversion=84c61fe1a75b4255df1e1e7c054c9e6d048da417 <eb0336f213fe88bbdb7d2b19c9c9ec19245a3155
  6. Affected versionversion=84c61fe1a75b4255df1e1e7c054c9e6d048da417 <ef50eaab631f9bf519ddbdfa42ccb0528adc1fc8
  7. Affected versionversion=84c61fe1a75b4255df1e1e7c054c9e6d048da417 <f1fe99919f629f980d0b8a7ff16950bffe06a859

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.0; version=84c61fe1a75b4255df1e1e7c054c9e6d048da417 <2fb97ed9e2672b4f6e24ce206ac1a875ce4bcb38; version=84c61fe1a75b4255df1e1e7c054c9e6d048da417 <6db015fc4b5d5f63a64a193f65d98da3a7fc811d; version=84c61fe1a75b4255df1e1e7c054c9e6d048da417 <db3658a12d5ec4db7185ae7476151a50521b7207; version=84c61fe1a75b4255df1e1e7c054c9e6d048da417 <eb0336f213fe88bbdb7d2b19c9c9ec19245a3155; version=84c61fe1a75b4255df1e1e7c054c9e6d048da417 <ef50eaab631f9bf519ddbdfa42ccb0528adc1fc8; version=84c61fe1a75b4255df1e1e7c054c9e6d048da417 <f1fe99919f629f980d0b8a7ff16950bffe06a859

Published CVSS scores

4.1Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
7.8Linux kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.1UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1068Exploitation for Privilege Escalation

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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