CVE-2023-28466

Local system crash via unlocked kTLS getsockopt

Published Mar 15, 2023 · Updated May 5, 2025

Race condition in the Linux kernel 6.2.6 and earlier allows local users to crash the system through concurrent kTLS socket options. The do_tls_getsockopt_conf function reads ctx->crypto_send.info without holding the socket lock while do_tls_setsockopt_conf error paths can free or clear that state. Exploitation requires local access, a kernel built with TLS support, and winning the high-complexity race, resulting in a use-after-free or NULL pointer dereference.

CVSS severity7.0
High
EPSS probability0.27%
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 6.2.6 and earlier allows local users to crash the system through concurrent kTLS socket options. The do_tls_getsockopt_conf function reads ctx->crypto_send.info without holding the socket lock while do_tls_setsockopt_conf error paths can free or clear that state. Exploitation requires local access, a kernel built with TLS support, and winning the high-complexity race, resulting in a use-after-free or NULL pointer dereference.

The record

CVE
CVE-2023-28466
Published
Mar 15, 2023
Updated
May 5, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 15, 2023CVE publishedPublication date reported by the CVE source.
  2. May 5, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.0CISA-ADPCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.0NVDCVSS:3.1/AV:L/AC:H/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1068Exploitation for Privilege Escalation

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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