github - ghsa-gjpp-3xmc-r9c5

GHSA-GJPP-3XMC-R9C5

Vulnerability from github – Published: 2024-11-09 12:30 – Updated: 2024-11-14 18:30

Details

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

bpf: Check the validity of nr_words in bpf_iter_bits_new()

Check the validity of nr_words in bpf_iter_bits_new(). Without this check, when multiplication overflow occurs for nr_bits (e.g., when nr_words = 0x0400-0001, nr_bits becomes 64), stack corruption may occur due to bpf_probe_read_kernel_common(..., nr_bytes = 0x2000-0008).

Fix it by limiting the maximum value of nr_words to 511. The value is derived from the current implementation of BPF memory allocator. To ensure compatibility if the BPF memory allocator's size limitation changes in the future, use the helper bpf_mem_alloc_check_size() to check whether nr_bytes is too larger. And return -E2BIG instead of -ENOMEM for oversized nr_bytes.

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-2024-50253"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-11-09T11:15:11Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Check the validity of nr_words in bpf_iter_bits_new()\n\nCheck the validity of nr_words in bpf_iter_bits_new(). Without this\ncheck, when multiplication overflow occurs for nr_bits (e.g., when\nnr_words = 0x0400-0001, nr_bits becomes 64), stack corruption may occur\ndue to bpf_probe_read_kernel_common(..., nr_bytes = 0x2000-0008).\n\nFix it by limiting the maximum value of nr_words to 511. The value is\nderived from the current implementation of BPF memory allocator. To\nensure compatibility if the BPF memory allocator\u0027s size limitation\nchanges in the future, use the helper bpf_mem_alloc_check_size() to\ncheck whether nr_bytes is too larger. And return -E2BIG instead of\n-ENOMEM for oversized nr_bytes.",
  "id": "GHSA-gjpp-3xmc-r9c5",
  "modified": "2024-11-14T18:30:32Z",
  "published": "2024-11-09T12:30:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50253"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/393397fbdcad7396639d7077c33f86169184ba99"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c9539e09c67880ecd88b51188c346a2cc078b06c"
    }
  ],
  "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-2024-50253 (GCVE-0-2024-50253)

Vulnerability from cvelistv5 – Published: 2024-11-09 10:15 – Updated: 2025-10-01 20:17

Title

bpf: Check the validity of nr_words in bpf_iter_bits_new()

Summary

In the Linux kernel, the following vulnerability has been resolved: bpf: Check the validity of nr_words in bpf_iter_bits_new() Check the validity of nr_words in bpf_iter_bits_new(). Without this check, when multiplication overflow occurs for nr_bits (e.g., when nr_words = 0x0400-0001, nr_bits becomes 64), stack corruption may occur due to bpf_probe_read_kernel_common(..., nr_bytes = 0x2000-0008). Fix it by limiting the maximum value of nr_words to 511. The value is derived from the current implementation of BPF memory allocator. To ensure compatibility if the BPF memory allocator's size limitation changes in the future, use the helper bpf_mem_alloc_check_size() to check whether nr_bytes is too larger. And return -E2BIG instead of -ENOMEM for oversized nr_bytes.

Severity ?

5.5 (Medium)


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

CWE

CWE-noinfo Not enough information

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/c9539e09c67880ecd…
	https://git.kernel.org/stable/c/393397fbdcad73966…

Impacted products

Vendor

Product

Version

Linux

Affected: 4665415975b0827e9646cab91c61d02a6b364d59 , < c9539e09c67880ecd88b51188c346a2cc078b06c (git)
Affected: 4665415975b0827e9646cab91c61d02a6b364d59 , < 393397fbdcad7396639d7077c33f86169184ba99 (git)

Linux

Affected: 6.11
Unaffected: 0 , < 6.11 (semver)
Unaffected: 6.11.7 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)

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JSON

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  "containers": {
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        "metrics": [
          {
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              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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              "content": {
                "id": "CVE-2024-50253",
                "options": [
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                    "Exploitation": "none"
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                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T20:15:44.047457Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
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            "descriptions": [
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          "dateUpdated": "2025-10-01T20:17:24.826Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/helpers.c"
          ],
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          "vendor": "Linux",
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              "versionType": "git"
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    "datePublished": "2024-11-09T10:15:06.891Z",
    "dateReserved": "2024-10-21T19:36:19.979Z",
    "dateUpdated": "2025-10-01T20:17:24.826Z",
    "state": "PUBLISHED"
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Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-GJPP-3XMC-R9C5

CVE-2024-50253 (GCVE-0-2024-50253)

Tags

Sightings

Nomenclature