Vulnerability-Lookup

GHSA-CC5X-4C4F-8GXF

Vulnerability from github – Published: 2026-05-08 15:31 – Updated: 2026-05-11 09:30

Details

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

net: ncsi: fix skb leak in error paths

Early return paths in NCSI RX and AEN handlers fail to release the received skb, resulting in a memory leak.

Specifically, ncsi_aen_handler() returns on invalid AEN packets without consuming the skb. Similarly, ncsi_rcv_rsp() exits early when failing to resolve the NCSI device, response handler, or request, leaving the skb unfreed.

Severity

7.5 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-43373"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-401"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-08T15:16:48Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ncsi: fix skb leak in error paths\n\nEarly return paths in NCSI RX and AEN handlers fail to release\nthe received skb, resulting in a memory leak.\n\nSpecifically, ncsi_aen_handler() returns on invalid AEN packets\nwithout consuming the skb. Similarly, ncsi_rcv_rsp() exits early\nwhen failing to resolve the NCSI device, response handler, or\nrequest, leaving the skb unfreed.",
  "id": "GHSA-cc5x-4c4f-8gxf",
  "modified": "2026-05-11T09:30:30Z",
  "published": "2026-05-08T15:31:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43373"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/553366c271479c0d571dd1bb5d1bcde4747fb82e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/59962588197863d0d746879f193905c0c6b3df49"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5c3398a54266541610c8d0a7082e654e9ff3e259"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/81d6aee32f8f7bbc175c05dbf61f4430bfb88c4a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/87138dde2d6937b12b967f28fe598a7d59000ae4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9891d7f4f1ede473c54b49776ae07755083eef06"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b70c4e5e711931cdd56e6e905737b72f1e649189"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fef5aa6e3bcf3c8053307642663a63b7362d7552"
    }
  ],
  "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"
    }
  ]
}

CVE-2026-43373 (GCVE-0-2026-43373)

Vulnerability from cvelistv5 – Published: 2026-05-08 14:21 – Updated: 2026-05-11 22:23

Title

net: ncsi: fix skb leak in error paths

Summary

In the Linux kernel, the following vulnerability has been resolved: net: ncsi: fix skb leak in error paths Early return paths in NCSI RX and AEN handlers fail to release the received skb, resulting in a memory leak. Specifically, ncsi_aen_handler() returns on invalid AEN packets without consuming the skb. Similarly, ncsi_rcv_rsp() exits early when failing to resolve the NCSI device, response handler, or request, leaving the skb unfreed.

Severity

7.5 (High)


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

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/9891d7f4f1ede473c…
https://git.kernel.org/stable/c/fef5aa6e3bcf3c805…
https://git.kernel.org/stable/c/81d6aee32f8f7bbc1…
https://git.kernel.org/stable/c/59962588197863d0d…
https://git.kernel.org/stable/c/553366c271479c0d5…
https://git.kernel.org/stable/c/b70c4e5e711931cdd…
https://git.kernel.org/stable/c/87138dde2d6937b12…
https://git.kernel.org/stable/c/5c3398a5426654161…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 138635cc27c9737f940c3aa80912ff7a61c825af , < 9891d7f4f1ede473c54b49776ae07755083eef06 (git) Affected: 138635cc27c9737f940c3aa80912ff7a61c825af , < fef5aa6e3bcf3c8053307642663a63b7362d7552 (git) Affected: 138635cc27c9737f940c3aa80912ff7a61c825af , < 81d6aee32f8f7bbc175c05dbf61f4430bfb88c4a (git) Affected: 138635cc27c9737f940c3aa80912ff7a61c825af , < 59962588197863d0d746879f193905c0c6b3df49 (git) Affected: 138635cc27c9737f940c3aa80912ff7a61c825af , < 553366c271479c0d571dd1bb5d1bcde4747fb82e (git) Affected: 138635cc27c9737f940c3aa80912ff7a61c825af , < b70c4e5e711931cdd56e6e905737b72f1e649189 (git) Affected: 138635cc27c9737f940c3aa80912ff7a61c825af , < 87138dde2d6937b12b967f28fe598a7d59000ae4 (git) Affected: 138635cc27c9737f940c3aa80912ff7a61c825af , < 5c3398a54266541610c8d0a7082e654e9ff3e259 (git)
Linux	Linux	Affected: 4.8 Unaffected: 0 , < 4.8 (semver) Unaffected: 5.10.253 , ≤ 5.10.* (semver) Unaffected: 5.15.203 , ≤ 5.15.* (semver) Unaffected: 6.1.167 , ≤ 6.1.* (semver) Unaffected: 6.6.130 , ≤ 6.6.* (semver) Unaffected: 6.12.78 , ≤ 6.12.* (semver) Unaffected: 6.18.19 , ≤ 6.18.* (semver) Unaffected: 6.19.9 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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JSON

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{
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ncsi/ncsi-aen.c",
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            {
              "status": "affected",
              "version": "4.8"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.253",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.203",
              "versionType": "semver"
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              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
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              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.130",
              "versionType": "semver"
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              "version": "6.12.78",
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            },
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              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.19",
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            },
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              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.9",
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            },
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
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      "cpeApplicability": [
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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.

Action not permitted

GHSA-CC5X-4C4F-8GXF

CVE-2026-43373 (GCVE-0-2026-43373)

Tags

Sightings

Nomenclature