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CVE-2025-22063 (GCVE-0-2025-22063)

Vulnerability from cvelistv5 – Published: 2025-04-16 14:12 – Updated: 2026-05-11 21:11
VLAI
Title
netlabel: Fix NULL pointer exception caused by CALIPSO on IPv4 sockets
Summary
In the Linux kernel, the following vulnerability has been resolved: netlabel: Fix NULL pointer exception caused by CALIPSO on IPv4 sockets When calling netlbl_conn_setattr(), addr->sa_family is used to determine the function behavior. If sk is an IPv4 socket, but the connect function is called with an IPv6 address, the function calipso_sock_setattr() is triggered. Inside this function, the following code is executed: sk_fullsock(__sk) ? inet_sk(__sk)->pinet6 : NULL; Since sk is an IPv4 socket, pinet6 is NULL, leading to a null pointer dereference. This patch fixes the issue by checking if inet6_sk(sk) returns a NULL pointer before accessing pinet6.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 17:40 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ceba1832b1b2da0149c51de62a847c00bca1677a , < 1ad9166cab6a0f5c0b10344a97bdf749ae11dcbf (git)
Affected: ceba1832b1b2da0149c51de62a847c00bca1677a , < 1e38f7a6cdd68377f8a4189b2fbaec14a6dd5152 (git)
Affected: ceba1832b1b2da0149c51de62a847c00bca1677a , < a7e89541d05b98c79a51c0f95df020f8e82b62ed (git)
Affected: ceba1832b1b2da0149c51de62a847c00bca1677a , < 797e5371cf55463b4530bab3fef5f27f7c6657a8 (git)
Affected: ceba1832b1b2da0149c51de62a847c00bca1677a , < 1927d0bcd5b81e80971bf6b8eba267508bd1c78b (git)
Affected: ceba1832b1b2da0149c51de62a847c00bca1677a , < 3ba9cf69de50e8abed32b448616c313baa4c5712 (git)
Affected: ceba1832b1b2da0149c51de62a847c00bca1677a , < 9fe3839588db7519030377b7dee3f165e654f6c5 (git)
Affected: ceba1832b1b2da0149c51de62a847c00bca1677a , < 172a8a996a337206970467e871dd995ac07640b1 (git)
Affected: ceba1832b1b2da0149c51de62a847c00bca1677a , < 078aabd567de3d63d37d7673f714e309d369e6e2 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.8
Unaffected: 0 , < 4.8 (semver)
Unaffected: 5.4.292 , ≤ 5.4.* (semver)
Unaffected: 5.10.236 , ≤ 5.10.* (semver)
Unaffected: 5.15.180 , ≤ 5.15.* (semver)
Unaffected: 6.1.134 , ≤ 6.1.* (semver)
Unaffected: 6.6.87 , ≤ 6.6.* (semver)
Unaffected: 6.12.23 , ≤ 6.12.* (semver)
Unaffected: 6.13.11 , ≤ 6.13.* (semver)
Unaffected: 6.14.2 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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If sk is an IPv4 socket,\\nbut the connect function is called with an IPv6 address,\\nthe function calipso_sock_setattr() is triggered.\\nInside this function, the following code is executed:\\n\\nsk_fullsock(__sk) ? inet_sk(__sk)-\u003epinet6 : NULL;\\n\\nSince sk is an IPv4 socket, pinet6 is NULL, leading to a\\nnull pointer dereference.\\n\\nThis patch fixes the issue by checking if inet6_sk(sk)\\nreturns a NULL pointer before accessing pinet6.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netlabel: Se corrige la excepci\u00f3n de puntero nulo causada por CALIPSO en sockets IPv4. Al llamar a netlbl_conn_setattr(), se utiliza addr-\u0026gt;sa_family para determinar el comportamiento de la funci\u00f3n. Si sk es un socket IPv4, pero se llama a la funci\u00f3n connect con una direcci\u00f3n IPv6, se activa la funci\u00f3n calipso_sock_setattr(). Dentro de esta funci\u00f3n, se ejecuta el siguiente c\u00f3digo: sk_fullsock(__sk) ? inet_sk(__sk)-\u0026gt;pinet6 : NULL; Dado que sk es un socket IPv4, pinet6 es NULL, lo que provoca una desreferencia de puntero nulo. Este parche corrige el problema comprobando si inet6_sk(sk) devuelve un puntero nulo antes de acceder a 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-11T10:21:01+00:00",
      "cve": "CVE-2025-22063",
      "id": "CVE-2025-22063",
      "initial_release_date": "2025-04-16T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "product_status:under_investigation": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: netlabel: Fix NULL pointer exception caused by CALIPSO on IPv4 sockets",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-22063.json",
      "version": "3"
    },
    "vulnrichment": {
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\"https://git.kernel.org/stable/c/1e38f7a6cdd68377f8a4189b2fbaec14a6dd5152\"}, {\"url\": \"https://git.kernel.org/stable/c/a7e89541d05b98c79a51c0f95df020f8e82b62ed\"}, {\"url\": \"https://git.kernel.org/stable/c/797e5371cf55463b4530bab3fef5f27f7c6657a8\"}, {\"url\": \"https://git.kernel.org/stable/c/1927d0bcd5b81e80971bf6b8eba267508bd1c78b\"}, {\"url\": \"https://git.kernel.org/stable/c/3ba9cf69de50e8abed32b448616c313baa4c5712\"}, {\"url\": \"https://git.kernel.org/stable/c/9fe3839588db7519030377b7dee3f165e654f6c5\"}, {\"url\": \"https://git.kernel.org/stable/c/172a8a996a337206970467e871dd995ac07640b1\"}, {\"url\": \"https://git.kernel.org/stable/c/078aabd567de3d63d37d7673f714e309d369e6e2\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetlabel: Fix NULL pointer exception caused by CALIPSO on IPv4 sockets\\n\\nWhen calling netlbl_conn_setattr(), addr-\u003esa_family is used\\nto determine the function behavior. If sk is an IPv4 socket,\\nbut the connect function is called with an IPv6 address,\\nthe function calipso_sock_setattr() is triggered.\\nInside this function, the following code is executed:\\n\\nsk_fullsock(__sk) ? inet_sk(__sk)-\u003epinet6 : NULL;\\n\\nSince sk is an IPv4 socket, pinet6 is NULL, leading to a\\nnull pointer dereference.\\n\\nThis patch fixes the issue by checking if inet6_sk(sk)\\nreturns a NULL pointer before accessing pinet6.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.292\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.236\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.180\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.134\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.87\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.23\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.13.11\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.14.2\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.15\", \"versionStartIncluding\": \"4.8\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-26T05:17:39.582Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-22063\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-03T19:41:48.111Z\", \"dateReserved\": \"2024-12-29T08:45:45.813Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-04-16T14:12:18.222Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.