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Review reviewHigh

CVE-2025-38616

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: tls: handle data disappearing from under the TLS ULP TLS expects that it owns the receive queue of the TCP socket. This cannot be guaranteed in case the reader of the TCP socket entered before the TLS ULP was installed, or uses some non-standard read API (eg. zerocopy ones). Replace the WARN_ON() and a buggy early exit (which leaves anchor pointing to a freed skb) with real error handling. Wipe the parsing state and tell the reader to retry. We already reload the anchor every time we (re)acquire the socket lock, so the only...

CVSS
7.1
EPSS
0.20%
9.58% percentile
CISA KEV
Not listed
Published
2025.08.22
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.20%
Technical severityCVSS 7.1

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: tls: handle data disappearing from under the TLS ULP TLS expects that it owns the receive queue of the TCP socket. This cannot be guaranteed in case the reader of the TCP socket entered before the TLS ULP was installed, or uses some non-standard read API (eg. zerocopy ones). Replace the WARN_ON() and a buggy early exit (which leaves anchor pointing to a freed skb) with real error handling. Wipe the parsing state and tell the reader to retry. We already reload the anchor every time we (re)acquire the socket lock, so the only...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 84c61fe1a75b4255df1e1e7c054c9e6d048da417 < f1fe99919f629f980d0b8a7ff16950bffe06a859, >= 84c61fe1a75b4255df1e1e7c054c9e6d048da417 < eb0336f213fe88bbdb7d2b19c9c9ec19245a3155, >= 84c61fe1a75b4255df1e1e7c054c9e6d048da417 < db3658a12d5ec4db7185ae7476151a50521b7207, >= 84c61fe1a75b4255df1e1e7c054c9e6d048da417 < 2fb97ed9e2672b4f6e24ce206ac1a875ce4bcb38, >= 84c61fe1a75b4255df1e1e7c054c9e6d048da417 < 6db015fc4b5d5f63a64a193f65d98da3a7fc811d, >= 6.0, >= 6.0 < 6.6.103, >= 6.7 < 6.12.43, >= 6.13 < 6.15.11, >= 6.16 < 6.16.2, 6.17
Fixed versions
6.6.103, 6.12.43, 6.15.11, 6.16.2

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE
CWE-125
CVE-2025-38616 — Linux Linux, linux kernel | SECUFOCUS NOW