Vulnerability-Lookup

GHSA-QVF9-958H-6H8P

Vulnerability from github – Published: 2024-10-21 15:32 – Updated: 2025-11-04 00:31

Details

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

bpf: correctly handle malformed BPF_CORE_TYPE_ID_LOCAL relos

In case of malformed relocation record of kind BPF_CORE_TYPE_ID_LOCAL referencing a non-existing BTF type, function bpf_core_calc_relo_insn would cause a null pointer deference.

Fix this by adding a proper check upper in call stack, as malformed relocation records could be passed from user space.

Simplest reproducer is a program:

r0 = 0
exit

With a single relocation record:

.insn_off = 0,          /* patch first instruction */
.type_id = 100500,      /* this type id does not exist */
.access_str_off = 6,    /* offset of string "0" */
.kind = BPF_CORE_TYPE_ID_LOCAL,

See the link for original reproducer or next commit for a test case.

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2024-49850"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-10-21T13:15:05Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: correctly handle malformed BPF_CORE_TYPE_ID_LOCAL relos\n\nIn case of malformed relocation record of kind BPF_CORE_TYPE_ID_LOCAL\nreferencing a non-existing BTF type, function bpf_core_calc_relo_insn\nwould cause a null pointer deference.\n\nFix this by adding a proper check upper in call stack, as malformed\nrelocation records could be passed from user space.\n\nSimplest reproducer is a program:\n\n    r0 = 0\n    exit\n\nWith a single relocation record:\n\n    .insn_off = 0,          /* patch first instruction */\n    .type_id = 100500,      /* this type id does not exist */\n    .access_str_off = 6,    /* offset of string \"0\" */\n    .kind = BPF_CORE_TYPE_ID_LOCAL,\n\nSee the link for original reproducer or next commit for a test case.",
  "id": "GHSA-qvf9-958h-6h8p",
  "modified": "2025-11-04T00:31:39Z",
  "published": "2024-10-21T15:32:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-49850"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2288b54b96dcb55bedebcef3572bb8821fc5e708"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3d2786d65aaa954ebd3fcc033ada433e10da21c4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/584cd3ff792e1edbea20b2a7df55897159b0be3e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dc7ce14f00bcd50641f2110b7a32aa6552e0780f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e7e9c5b2dda29067332df2a85b0141a92b41f218"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.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"
    }
  ]
}

CVE-2024-49850 (GCVE-0-2024-49850)

Vulnerability from cvelistv5 – Published: 2024-10-21 12:18 – Updated: 2026-05-11 20:40

Title

bpf: correctly handle malformed BPF_CORE_TYPE_ID_LOCAL relos

Summary

In the Linux kernel, the following vulnerability has been resolved: bpf: correctly handle malformed BPF_CORE_TYPE_ID_LOCAL relos In case of malformed relocation record of kind BPF_CORE_TYPE_ID_LOCAL referencing a non-existing BTF type, function bpf_core_calc_relo_insn would cause a null pointer deference. Fix this by adding a proper check upper in call stack, as malformed relocation records could be passed from user space. Simplest reproducer is a program: r0 = 0 exit With a single relocation record: .insn_off = 0, /* patch first instruction */ .type_id = 100500, /* this type id does not exist */ .access_str_off = 6, /* offset of string "0" */ .kind = BPF_CORE_TYPE_ID_LOCAL, See the link for original reproducer or next commit for a test case.

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-10-21 12:57 UTC

Assigner

Linux mitre root

References

6 references

URL	Tags
https://git.kernel.org/stable/c/dc7ce14f00bcd5064…
https://git.kernel.org/stable/c/2288b54b96dcb55be…
https://git.kernel.org/stable/c/584cd3ff792e1edbe…
https://git.kernel.org/stable/c/e7e9c5b2dda290673…
https://git.kernel.org/stable/c/3d2786d65aaa954eb…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 74753e1462e77349525daf9eb60ea21ed92d3a97 , < dc7ce14f00bcd50641f2110b7a32aa6552e0780f (git) Affected: 74753e1462e77349525daf9eb60ea21ed92d3a97 , < 2288b54b96dcb55bedebcef3572bb8821fc5e708 (git) Affected: 74753e1462e77349525daf9eb60ea21ed92d3a97 , < 584cd3ff792e1edbea20b2a7df55897159b0be3e (git) Affected: 74753e1462e77349525daf9eb60ea21ed92d3a97 , < e7e9c5b2dda29067332df2a85b0141a92b41f218 (git) Affected: 74753e1462e77349525daf9eb60ea21ed92d3a97 , < 3d2786d65aaa954ebd3fcc033ada433e10da21c4 (git)
Linux	Linux	Affected: 5.17 Unaffected: 0 , < 5.17 (semver) Unaffected: 6.1.113 , ≤ 6.1.* (semver) Unaffected: 6.6.54 , ≤ 6.6.* (semver) Unaffected: 6.10.13 , ≤ 6.10.* (semver) Unaffected: 6.11.2 , ≤ 6.11.* (semver) Unaffected: 6.12 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

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