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

Vulnerability from cvelistv5 – Published: 2026-05-08 14:21 – Updated: 2026-05-08 14:21
VLAI?
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 ?
No CVSS data available.
Assigner
References
Impacted 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)
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    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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{
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          "product": "Linux",
          "programFiles": [
            "net/ncsi/ncsi-aen.c",
            "net/ncsi/ncsi-rsp.c"
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          "vendor": "Linux",
          "versions": [
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              "version": "0",
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              "status": "unaffected",
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            {
              "lessThanOrEqual": "5.15.*",
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              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
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          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-08T14:21:23.875Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "cveId": "CVE-2026-43373",
    "datePublished": "2026-05-08T14:21:23.875Z",
    "dateReserved": "2026-05-01T14:12:56.006Z",
    "dateUpdated": "2026-05-08T14:21:23.875Z",
    "state": "PUBLISHED"
  },
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      "date": "2026-05-09",
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  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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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.



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