github - ghsa-5x23-w3hg-qfcx

ghsa-5x23-w3hg-qfcx

Vulnerability from github

Published

2024-07-12 15:31

Modified

2024-08-21 18:31

Severity ?

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

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

bpf: Avoid splat in pskb_pull_reason

syzkaller builds (CONFIG_DEBUG_NET=y) frequently trigger a debug hint in pskb_may_pull.

We'd like to retain this debug check because it might hint at integer overflows and other issues (kernel code should pull headers, not huge value).

In bpf case, this splat isn't interesting at all: such (nonsensical) bpf programs are typically generated by a fuzzer anyway.

Do what Eric suggested and suppress such warning.

For CONFIG_DEBUG_NET=n we don't need the extra check because pskb_may_pull will do the right thing: return an error without the WARN() backtrace.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-40996"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-07-12T13:15:20Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Avoid splat in pskb_pull_reason\n\nsyzkaller builds (CONFIG_DEBUG_NET=y) frequently trigger a debug\nhint in pskb_may_pull.\n\nWe\u0027d like to retain this debug check because it might hint at integer\noverflows and other issues (kernel code should pull headers, not huge\nvalue).\n\nIn bpf case, this splat isn\u0027t interesting at all: such (nonsensical)\nbpf programs are typically generated by a fuzzer anyway.\n\nDo what Eric suggested and suppress such warning.\n\nFor CONFIG_DEBUG_NET=n we don\u0027t need the extra check because\npskb_may_pull will do the right thing: return an error without the\nWARN() backtrace.",
  "id": "GHSA-5x23-w3hg-qfcx",
  "modified": "2024-08-21T18:31:26Z",
  "published": "2024-07-12T15:31:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-40996"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2bbe3e5a2f4ef69d13be54f1cf895b4658287080"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5e90258303a358e88737afb5048bee9113beea3a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7f9644782c559635bd676c12c59389a34ed7c866"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dacc15e9cb248d19e5fc63c54bef0b9b55007761"
    }
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  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

cve-2024-40996

Vulnerability from cvelistv5

Published

2024-07-12 12:37

Modified

2024-12-19 09:09

Severity ?

Summary

In the Linux kernel, the following vulnerability has been resolved: bpf: Avoid splat in pskb_pull_reason syzkaller builds (CONFIG_DEBUG_NET=y) frequently trigger a debug hint in pskb_may_pull. We'd like to retain this debug check because it might hint at integer overflows and other issues (kernel code should pull headers, not huge value). In bpf case, this splat isn't interesting at all: such (nonsensical) bpf programs are typically generated by a fuzzer anyway. Do what Eric suggested and suppress such warning. For CONFIG_DEBUG_NET=n we don't need the extra check because pskb_may_pull will do the right thing: return an error without the WARN() backtrace.

References

▼	URL	Tags
	https://git.kernel.org/stable/c/dacc15e9cb248d19e5fc63c54bef0b9b55007761
	https://git.kernel.org/stable/c/7f9644782c559635bd676c12c59389a34ed7c866
	https://git.kernel.org/stable/c/5e90258303a358e88737afb5048bee9113beea3a
	https://git.kernel.org/stable/c/2bbe3e5a2f4ef69d13be54f1cf895b4658287080

Impacted products

Vendor

Product

Version

▼

Linux

Version: 8af60bb2b215f478b886f1d6d302fefa7f0b917d
Version: 1b2b26595bb09febf14c5444c873ac4ec90a5a77
Version: 219eee9c0d16f1b754a8b85275854ab17df0850a
Version: 219eee9c0d16f1b754a8b85275854ab17df0850a

Linux

Version: 6.9

Show details on NVD website

JSON

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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