CVE-2025-22063

Local system crash via mismatched socket address

Published Apr 16, 2025 · Updated May 11, 2026

NULL pointer dereference in the Linux kernel allows local users to crash the system by supplying an IPv6 address to an IPv4 socket. netlbl_conn_setattr selects calipso_sock_setattr from the supplied address family, which accesses the absent IPv6 state of the IPv4 socket. A low-privileged local user must reach this mismatched CALIPSO path; successful exploitation interrupts the entire system.

CVSS severity5.5
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

NULL pointer dereference in the Linux kernel allows local users to crash the system by supplying an IPv6 address to an IPv4 socket. netlbl_conn_setattr selects calipso_sock_setattr from the supplied address family, which accesses the absent IPv6 state of the IPv4 socket. A low-privileged local user must reach this mismatched CALIPSO path; successful exploitation interrupts the entire system.

The record

CVE
CVE-2025-22063
Published
Apr 16, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 16, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=4.8
  2. Affected versionversion=ceba1832b1b2da0149c51de62a847c00bca1677a <078aabd567de3d63d37d7673f714e309d369e6e2
  3. Affected versionversion=ceba1832b1b2da0149c51de62a847c00bca1677a <172a8a996a337206970467e871dd995ac07640b1
  4. Affected versionversion=ceba1832b1b2da0149c51de62a847c00bca1677a <1927d0bcd5b81e80971bf6b8eba267508bd1c78b
  5. Affected versionversion=ceba1832b1b2da0149c51de62a847c00bca1677a <1ad9166cab6a0f5c0b10344a97bdf749ae11dcbf
  6. Affected versionversion=ceba1832b1b2da0149c51de62a847c00bca1677a <1e38f7a6cdd68377f8a4189b2fbaec14a6dd5152
  7. Affected versionversion=ceba1832b1b2da0149c51de62a847c00bca1677a <3ba9cf69de50e8abed32b448616c313baa4c5712
  8. Affected versionversion=ceba1832b1b2da0149c51de62a847c00bca1677a <797e5371cf55463b4530bab3fef5f27f7c6657a8
  9. Affected versionversion=ceba1832b1b2da0149c51de62a847c00bca1677a <9fe3839588db7519030377b7dee3f165e654f6c5
  10. Affected versionversion=ceba1832b1b2da0149c51de62a847c00bca1677a <a7e89541d05b98c79a51c0f95df020f8e82b62ed

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.8; version=ceba1832b1b2da0149c51de62a847c00bca1677a <078aabd567de3d63d37d7673f714e309d369e6e2; version=ceba1832b1b2da0149c51de62a847c00bca1677a <172a8a996a337206970467e871dd995ac07640b1; version=ceba1832b1b2da0149c51de62a847c00bca1677a <1927d0bcd5b81e80971bf6b8eba267508bd1c78b; version=ceba1832b1b2da0149c51de62a847c00bca1677a <1ad9166cab6a0f5c0b10344a97bdf749ae11dcbf; version=ceba1832b1b2da0149c51de62a847c00bca1677a <1e38f7a6cdd68377f8a4189b2fbaec14a6dd5152; version=ceba1832b1b2da0149c51de62a847c00bca1677a <3ba9cf69de50e8abed32b448616c313baa4c5712; version=ceba1832b1b2da0149c51de62a847c00bca1677a <797e5371cf55463b4530bab3fef5f27f7c6657a8; version=ceba1832b1b2da0149c51de62a847c00bca1677a <9fe3839588db7519030377b7dee3f165e654f6c5; version=ceba1832b1b2da0149c51de62a847c00bca1677a <a7e89541d05b98c79a51c0f95df020f8e82b62ed

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
T1499Endpoint Denial of Service

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo