Common Weakness Enumeration

CWE-476

Allowed

NULL Pointer Dereference

Abstraction: Base · Status: Stable

API response cwe.mitre.org

The product dereferences a pointer that it expects to be valid but is NULL.

6679 vulnerabilities reference this CWE, most recent first.

GHSA-C6C6-9C6X-QJ3G

Vulnerability from github – Published: 2023-08-11 15:30 – Updated: 2024-04-04 06:52
VLAI
Details

An issue was discovered in ecma-helpers.c in jerryscript version 2.3.0, allows local attackers to cause a denial of service (DoS) (Null Pointer Dereference).

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2020-24187"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-08-11T14:15:10Z",
    "severity": "MODERATE"
  },
  "details": "An issue was discovered in ecma-helpers.c in jerryscript version 2.3.0, allows local attackers to cause a denial of service (DoS) (Null Pointer Dereference).",
  "id": "GHSA-c6c6-9c6x-qj3g",
  "modified": "2024-04-04T06:52:33Z",
  "published": "2023-08-11T15:30:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-24187"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jerryscript-project/jerryscript/issues/4076"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Aurorainfinity/Poc/tree/master/jerryscript/NULL-dereference-ecma_get_lex_env_type"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-C6H3-G88W-QCM8

Vulnerability from github – Published: 2024-05-01 06:31 – Updated: 2024-06-03 18:55
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

drm/vmwgfx: Fix possible null pointer derefence with invalid contexts

vmw_context_cotable can return either an error or a null pointer and its usage sometimes went unchecked. Subsequent code would then try to access either a null pointer or an error value.

The invalid dereferences were only possible with malformed userspace apps which never properly initialized the rendering contexts.

Check the results of vmw_context_cotable to fix the invalid derefs.

Thanks: ziming zhang(@ezrak1e) from Ant Group Light-Year Security Lab who was the first person to discover it. Niels De Graef who reported it and helped to track down the poc.

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2024-26979"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-01T06:15:15Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: Fix possible null pointer derefence with invalid contexts\n\nvmw_context_cotable can return either an error or a null pointer and its\nusage sometimes went unchecked. Subsequent code would then try to access\neither a null pointer or an error value.\n\nThe invalid dereferences were only possible with malformed userspace\napps which never properly initialized the rendering contexts.\n\nCheck the results of vmw_context_cotable to fix the invalid derefs.\n\nThanks:\nziming zhang(@ezrak1e) from Ant Group Light-Year Security Lab\nwho was the first person to discover it.\nNiels De Graef who reported it and helped to track down the poc.",
  "id": "GHSA-c6h3-g88w-qcm8",
  "modified": "2024-06-03T18:55:51Z",
  "published": "2024-05-01T06:31:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26979"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/07c3fe923ff7eccf684fb4f8c953d0a7cc8ded73"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/517621b7060096e48e42f545fa6646fc00252eac"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/585fec7361e7850bead21fada49a7fcde2f2e791"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/899e154f9546fcae18065d74064889d08fff62c2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9cb3755b1e3680b720b74dbedfac889e904605c7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c560327d900bab968c2e1b4cd7fa2d46cd429e3d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ff41e0d4f3fa10d7cdd7d40f8026bea9fcc8b000"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-C6JQ-H4JP-72PR

Vulnerability from github – Published: 2019-07-26 16:10 – Updated: 2024-09-04 20:26
VLAI
Summary
Aubio is vulnerable to a NULL pointer dereference in new_aubio_notes function
Details

aubio v0.4.0 to v0.4.8 has a new_aubio_onset NULL pointer dereference in new_aubio_notes function within src/notes/notes.c.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "aubio"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.4.0"
            },
            {
              "fixed": "0.4.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2018-19802"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2019-07-25T16:08:26Z",
    "nvd_published_at": "2019-06-07T17:29:00Z",
    "severity": "HIGH"
  },
  "details": "aubio v0.4.0 to v0.4.8 has a new_aubio_onset NULL pointer dereference in `new_aubio_notes` function within `src/notes/notes.c`.",
  "id": "GHSA-c6jq-h4jp-72pr",
  "modified": "2024-09-04T20:26:30Z",
  "published": "2019-07-26T16:10:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-19802"
    },
    {
      "type": "WEB",
      "url": "https://github.com/aubio/aubio/commit/c5ee1307bdc004e43302abeca1802c2692b33a8e"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/aubio/aubio"
    },
    {
      "type": "WEB",
      "url": "https://github.com/aubio/aubio/blob/0.4.9/ChangeLog"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/aubio/PYSEC-2019-164.yaml"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IYIKPYXZIWYWWNNORSKWRCFFCP6AFMRZ"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OHIRMWW4JQ6UHJK4AVBJLFRLE2TPKC2W"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00063.html"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00067.html"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00003.html"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00012.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Aubio is vulnerable to a NULL pointer dereference in new_aubio_notes function"
}

GHSA-C6PR-P5HF-W49P

Vulnerability from github – Published: 2022-05-17 02:35 – Updated: 2022-05-17 02:35
VLAI
Details

OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to denial-of-service by authenticated remote attacker via sending a certificate with an embedded NULL character.

Severity
6.5 (Medium)
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2017-7522"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20",
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2017-06-27T13:29:00Z",
    "severity": "MODERATE"
  },
  "details": "OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to denial-of-service by authenticated remote attacker via sending a certificate with an embedded NULL character.",
  "id": "GHSA-c6pr-p5hf-w49p",
  "modified": "2022-05-17T02:35:50Z",
  "published": "2022-05-17T02:35:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-7522"
    },
    {
      "type": "WEB",
      "url": "https://community.openvpn.net/openvpn/wiki/VulnerabilitiesFixedInOpenVPN243"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/99230"
    },
    {
      "type": "WEB",
      "url": "http://www.securitytracker.com/id/1038768"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-C6QX-HFCQ-G673

Vulnerability from github – Published: 2024-03-20 15:32 – Updated: 2024-08-15 18:31
VLAI
Details

Null Pointer Dereference vulnerability in open source FreeImage v.3.19.0 [r1909] allows a local attacker to cause a denial of service (DoS) via the J2KImageToFIBITMAP() function when reading images in J2K format.

Severity
3.3 (Low)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2024-28584"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-03-20T06:15:12Z",
    "severity": "LOW"
  },
  "details": "Null Pointer Dereference vulnerability in open source FreeImage v.3.19.0 [r1909] allows a local attacker to cause a denial of service (DoS) via the J2KImageToFIBITMAP() function when reading images in J2K format.",
  "id": "GHSA-c6qx-hfcq-g673",
  "modified": "2024-08-15T18:31:43Z",
  "published": "2024-03-20T15:32:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-28584"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Ruanxingzhi/vul-report/tree/master/freeimage-r1909"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2024/04/11/10"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2024/04/11/2"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2024/04/11/3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-C6WP-8JC6-MJM8

Vulnerability from github – Published: 2022-01-07 00:00 – Updated: 2023-05-27 06:30
VLAI
Details

A Pointer Dereference vulnerability exists in GPAC 1.0.1 in unlink_chunk.isra, which causes a Denial of Service (context-dependent).

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2021-46038"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-01-05T23:15:00Z",
    "severity": "MODERATE"
  },
  "details": "A Pointer Dereference vulnerability exists in GPAC 1.0.1 in unlink_chunk.isra, which causes a Denial of Service (context-dependent).",
  "id": "GHSA-c6wp-8jc6-mjm8",
  "modified": "2023-05-27T06:30:36Z",
  "published": "2022-01-07T00:00:56Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-46038"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gpac/gpac/issues/2000"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2023/dsa-5411"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-C6WV-24CX-JXCG

Vulnerability from github – Published: 2022-07-27 00:00 – Updated: 2022-07-29 00:00
VLAI
Details

An issue was discovered in yasm version 1.3.0. There is a NULL pointer dereference in nasm_parser_directive() in modules/parsers/nasm/nasm-parse.c.

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2021-33459"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-07-26T13:15:00Z",
    "severity": "MODERATE"
  },
  "details": "An issue was discovered in yasm version 1.3.0. There is a NULL pointer dereference in nasm_parser_directive() in modules/parsers/nasm/nasm-parse.c.",
  "id": "GHSA-c6wv-24cx-jxcg",
  "modified": "2022-07-29T00:00:34Z",
  "published": "2022-07-27T00:00:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-33459"
    },
    {
      "type": "WEB",
      "url": "https://github.com/yasm/yasm/issues/167"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/Clingto/bb632c0c463f4b2c97e4f65f751c5e6d"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-C73W-7V4M-X2GX

Vulnerability from github – Published: 2022-05-14 00:55 – Updated: 2022-05-14 00:55
VLAI
Details

In LibSass 3.5.5, a NULL Pointer Dereference in the function Sass::Selector_List::populate_extends in SharedPtr.hpp (used by ast.cpp and ast_selectors.cpp) may cause a Denial of Service (application crash) via a crafted sass input file.

Severity
6.5 (Medium)
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2018-19797"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-12-03T06:29:00Z",
    "severity": "MODERATE"
  },
  "details": "In LibSass 3.5.5, a NULL Pointer Dereference in the function Sass::Selector_List::populate_extends in SharedPtr.hpp (used by ast.cpp and ast_selectors.cpp) may cause a Denial of Service (application crash) via a crafted sass input file.",
  "id": "GHSA-c73w-7v4m-x2gx",
  "modified": "2022-05-14T00:55:57Z",
  "published": "2022-05-14T00:55:57Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-19797"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sass/libsass/issues/2779"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00047.html"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00051.html"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00027.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-C753-VQF3-VJXH

Vulnerability from github – Published: 2022-05-13 01:08 – Updated: 2022-05-13 01:08
VLAI
Details

In SQLite through 3.22.0, databases whose schema is corrupted using a CREATE TABLE AS statement could cause a NULL pointer dereference, related to build.c and prepare.c.

Severity
7.5 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2018-8740"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-03-17T00:29:00Z",
    "severity": "HIGH"
  },
  "details": "In SQLite through 3.22.0, databases whose schema is corrupted using a CREATE TABLE AS statement could cause a NULL pointer dereference, related to build.c and prepare.c.",
  "id": "GHSA-c753-vqf3-vjxh",
  "modified": "2022-05-13T01:08:59Z",
  "published": "2022-05-13T01:08:59Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-8740"
    },
    {
      "type": "WEB",
      "url": "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=6964"
    },
    {
      "type": "WEB",
      "url": "https://bugs.launchpad.net/ubuntu/+source/sqlite3/+bug/1756349"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b@%3Cissues.bookkeeper.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4@%3Cissues.bookkeeper.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2019/01/msg00009.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2020/08/msg00037.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2023/05/msg00022.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PU4NZ6DDU4BEM3ACM3FM6GLEPX56ZQXK"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/4205-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/4394-1"
    },
    {
      "type": "WEB",
      "url": "https://www.sqlite.org/cgi/src/timeline?r=corrupt-schema"
    },
    {
      "type": "WEB",
      "url": "https://www.sqlite.org/cgi/src/vdiff?from=1774f1c3baf0bc3d\u0026to=d75e67654aa9620b"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00050.html"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/103466"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-C754-VQMV-W93F

Vulnerability from github – Published: 2025-07-09 12:31 – Updated: 2025-12-18 18:30
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

bcache: fix NULL pointer in cache_set_flush()

  1. LINE#1794 - LINE#1887 is some codes about function of bch_cache_set_alloc().
  2. LINE#2078 - LINE#2142 is some codes about function of register_cache_set().
  3. register_cache_set() will call bch_cache_set_alloc() in LINE#2098.

1794 struct cache_set bch_cache_set_alloc(struct cache_sb sb) 1795 { ... 1860 if (!(c->devices = kcalloc(c->nr_uuids, sizeof(void ), GFP_KERNEL)) || 1861 mempool_init_slab_pool(&c->search, 32, bch_search_cache) || 1862 mempool_init_kmalloc_pool(&c->bio_meta, 2, 1863 sizeof(struct bbio) + sizeof(struct bio_vec) * 1864 bucket_pages(c)) || 1865 mempool_init_kmalloc_pool(&c->fill_iter, 1, iter_size) || 1866 bioset_init(&c->bio_split, 4, offsetof(struct bbio, bio), 1867 BIOSET_NEED_BVECS|BIOSET_NEED_RESCUER) || 1868 !(c->uuids = alloc_bucket_pages(GFP_KERNEL, c)) || 1869 !(c->moving_gc_wq = alloc_workqueue("bcache_gc", 1870 WQ_MEM_RECLAIM, 0)) || 1871 bch_journal_alloc(c) || 1872 bch_btree_cache_alloc(c) || 1873 bch_open_buckets_alloc(c) || 1874 bch_bset_sort_state_init(&c->sort, ilog2(c->btree_pages))) 1875 goto err; ^^^^^^^^ 1876 ... 1883 return c; 1884 err: 1885 bch_cache_set_unregister(c); ^^^^^^^^^^^^^^^^^^^^^^^^^^^ 1886 return NULL; 1887 } ... 2078 static const char register_cache_set(struct cache *ca) 2079 { ... 2098 c = bch_cache_set_alloc(&ca->sb); 2099 if (!c) 2100 return err; ^^^^^^^^^^ ... 2128 ca->set = c; 2129 ca->set->cache[ca->sb.nr_this_dev] = ca; ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ... 2138 return NULL; 2139 err: 2140 bch_cache_set_unregister(c); 2141 return err; 2142 }

(1) If LINE#1860 - LINE#1874 is true, then do 'goto err'(LINE#1875) and call bch_cache_set_unregister()(LINE#1885). (2) As (1) return NULL(LINE#1886), LINE#2098 - LINE#2100 would return. (3) As (2) has returned, LINE#2128 - LINE#2129 would do not give the value to c->cache[], it means that c->cache[] is NULL.

LINE#1624 - LINE#1665 is some codes about function of cache_set_flush(). As (1), in LINE#1885 call bch_cache_set_unregister() ---> bch_cache_set_stop() ---> closure_queue() -.-> cache_set_flush() (as below LINE#1624)

1624 static void cache_set_flush(struct closure *cl) 1625 { ... 1654 for_each_cache(ca, c, i) 1655 if (ca->alloc_thread) ^^ 1656 kthread_stop(ca->alloc_thread); ... 1665 }

(4) In LINE#1655 ca is NULL(see (3)) in cache_set_flush() then the kernel crash occurred as below: [ 846.712887] bcache: register_cache() error drbd6: cannot allocate memory [ 846.713242] bcache: register_bcache() error : failed to register device [ 846.713336] bcache: cache_set_free() Cache set 2f84bdc1-498a-4f2f-98a7-01946bf54287 unregistered [ 846.713768] BUG: unable to handle kernel NULL pointer dereference at 00000000000009f8 [ 846.714790] PGD 0 P4D 0 [ 846.715129] Oops: 0000 [#1] SMP PTI [ 846.715472] CPU: 19 PID: 5057 Comm: kworker/19:16 Kdump: loaded Tainted: G OE --------- - - 4.18.0-147.5.1.el8_1.5es.3.x86_64 #1 [ 846.716082] Hardware name: ESPAN GI-25212/X11DPL-i, BIOS 2.1 06/15/2018 [ 846.716451] Workqueue: events cache_set_flush [bcache] [ 846.716808] RIP: 0010:cache_set_flush+0xc9/0x1b0 [bcache] [ 846.717155] Code: 00 4c 89 a5 b0 03 00 00 48 8b 85 68 f6 ff ff a8 08 0f 84 88 00 00 00 31 db 66 83 bd 3c f7 ff ff 00 48 8b 85 48 ff ff ff 74 28 <48> 8b b8 f8 09 00 0 ---truncated---

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2025-38263"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-07-09T11:15:28Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbcache: fix NULL pointer in cache_set_flush()\n\n1. LINE#1794 - LINE#1887 is some codes about function of\n   bch_cache_set_alloc().\n2. LINE#2078 - LINE#2142 is some codes about function of\n   register_cache_set().\n3. register_cache_set() will call bch_cache_set_alloc() in LINE#2098.\n\n 1794 struct cache_set *bch_cache_set_alloc(struct cache_sb *sb)\n 1795 {\n ...\n 1860         if (!(c-\u003edevices = kcalloc(c-\u003enr_uuids, sizeof(void *), GFP_KERNEL)) ||\n 1861             mempool_init_slab_pool(\u0026c-\u003esearch, 32, bch_search_cache) ||\n 1862             mempool_init_kmalloc_pool(\u0026c-\u003ebio_meta, 2,\n 1863                                 sizeof(struct bbio) + sizeof(struct bio_vec) *\n 1864                                 bucket_pages(c)) ||\n 1865             mempool_init_kmalloc_pool(\u0026c-\u003efill_iter, 1, iter_size) ||\n 1866             bioset_init(\u0026c-\u003ebio_split, 4, offsetof(struct bbio, bio),\n 1867                         BIOSET_NEED_BVECS|BIOSET_NEED_RESCUER) ||\n 1868             !(c-\u003euuids = alloc_bucket_pages(GFP_KERNEL, c)) ||\n 1869             !(c-\u003emoving_gc_wq = alloc_workqueue(\"bcache_gc\",\n 1870                                                 WQ_MEM_RECLAIM, 0)) ||\n 1871             bch_journal_alloc(c) ||\n 1872             bch_btree_cache_alloc(c) ||\n 1873             bch_open_buckets_alloc(c) ||\n 1874             bch_bset_sort_state_init(\u0026c-\u003esort, ilog2(c-\u003ebtree_pages)))\n 1875                 goto err;\n                      ^^^^^^^^\n 1876\n ...\n 1883         return c;\n 1884 err:\n 1885         bch_cache_set_unregister(c);\n              ^^^^^^^^^^^^^^^^^^^^^^^^^^^\n 1886         return NULL;\n 1887 }\n ...\n 2078 static const char *register_cache_set(struct cache *ca)\n 2079 {\n ...\n 2098         c = bch_cache_set_alloc(\u0026ca-\u003esb);\n 2099         if (!c)\n 2100                 return err;\n                      ^^^^^^^^^^\n ...\n 2128         ca-\u003eset = c;\n 2129         ca-\u003eset-\u003ecache[ca-\u003esb.nr_this_dev] = ca;\n              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n ...\n 2138         return NULL;\n 2139 err:\n 2140         bch_cache_set_unregister(c);\n 2141         return err;\n 2142 }\n\n(1) If LINE#1860 - LINE#1874 is true, then do \u0027goto err\u0027(LINE#1875) and\n    call bch_cache_set_unregister()(LINE#1885).\n(2) As (1) return NULL(LINE#1886), LINE#2098 - LINE#2100 would return.\n(3) As (2) has returned, LINE#2128 - LINE#2129 would do *not* give the\n    value to c-\u003ecache[], it means that c-\u003ecache[] is NULL.\n\nLINE#1624 - LINE#1665 is some codes about function of cache_set_flush().\nAs (1), in LINE#1885 call\nbch_cache_set_unregister()\n---\u003e bch_cache_set_stop()\n     ---\u003e closure_queue()\n          -.-\u003e cache_set_flush() (as below LINE#1624)\n\n 1624 static void cache_set_flush(struct closure *cl)\n 1625 {\n ...\n 1654         for_each_cache(ca, c, i)\n 1655                 if (ca-\u003ealloc_thread)\n                          ^^\n 1656                         kthread_stop(ca-\u003ealloc_thread);\n ...\n 1665 }\n\n(4) In LINE#1655 ca is NULL(see (3)) in cache_set_flush() then the\n    kernel crash occurred as below:\n[  846.712887] bcache: register_cache() error drbd6: cannot allocate memory\n[  846.713242] bcache: register_bcache() error : failed to register device\n[  846.713336] bcache: cache_set_free() Cache set 2f84bdc1-498a-4f2f-98a7-01946bf54287 unregistered\n[  846.713768] BUG: unable to handle kernel NULL pointer dereference at 00000000000009f8\n[  846.714790] PGD 0 P4D 0\n[  846.715129] Oops: 0000 [#1] SMP PTI\n[  846.715472] CPU: 19 PID: 5057 Comm: kworker/19:16 Kdump: loaded Tainted: G           OE    --------- -  - 4.18.0-147.5.1.el8_1.5es.3.x86_64 #1\n[  846.716082] Hardware name: ESPAN GI-25212/X11DPL-i, BIOS 2.1 06/15/2018\n[  846.716451] Workqueue: events cache_set_flush [bcache]\n[  846.716808] RIP: 0010:cache_set_flush+0xc9/0x1b0 [bcache]\n[  846.717155] Code: 00 4c 89 a5 b0 03 00 00 48 8b 85 68 f6 ff ff a8 08 0f 84 88 00 00 00 31 db 66 83 bd 3c f7 ff ff 00 48 8b 85 48 ff ff ff 74 28 \u003c48\u003e 8b b8 f8 09 00 0\n---truncated---",
  "id": "GHSA-c754-vqmv-w93f",
  "modified": "2025-12-18T18:30:28Z",
  "published": "2025-07-09T12:31:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38263"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1e46ed947ec658f89f1a910d880cd05e42d3763e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1f25f2d3fa29325320c19a30abf787e0bd5fc91b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3f9e128186c99a117e304f1dce6d0b9e50c63cd8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/553f560e0a74a7008ad9dba05c3fd05da296befb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/667c3f52373ff5354cb3543e27237eb7df7b2333"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c4f5e7e417034b05f5d2f5fa9a872db897da69bd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d54681938b777488e5dfb781b566d16adad991de"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}
Mitigation MIT-56
Implementation

For any pointers that could have been modified or provided from a function that can return NULL, check the pointer for NULL before use. When working with a multithreaded or otherwise asynchronous environment, ensure that proper locking APIs are used to lock before the check, and unlock when it has finished [REF-1484].

Mitigation
Requirements

Select a programming language that is not susceptible to these issues.

Mitigation
Implementation

Check the results of all functions that return a value and verify that the value is non-null before acting upon it.

Mitigation
Architecture and Design

Identify all variables and data stores that receive information from external sources, and apply input validation to make sure that they are only initialized to expected values.

Mitigation
Implementation

Explicitly initialize all variables and other data stores, either during declaration or just before the first usage.

No CAPEC attack patterns related to this CWE.

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