GHSA-F37V-5R8J-33M9

Vulnerability from github – Published: 2026-04-22 15:31 – Updated: 2026-07-14 15:31
VLAI
Details

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

esp: fix skb leak with espintcp and async crypto

When the TX queue for espintcp is full, esp_output_tail_tcp will return an error and not free the skb, because with synchronous crypto, the common xfrm output code will drop the packet for us.

With async crypto (esp_output_done), we need to drop the skb when esp_output_tail_tcp returns an error.

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-2026-31518"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-401"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-22T14:16:51Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nesp: fix skb leak with espintcp and async crypto\n\nWhen the TX queue for espintcp is full, esp_output_tail_tcp will\nreturn an error and not free the skb, because with synchronous crypto,\nthe common xfrm output code will drop the packet for us.\n\nWith async crypto (esp_output_done), we need to drop the skb when\nesp_output_tail_tcp returns an error.",
  "id": "GHSA-f37v-5r8j-33m9",
  "modified": "2026-07-14T15:31:53Z",
  "published": "2026-04-22T15:31:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31518"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0c0eef8ccd2413b0a10eb6bbd3442333b1e64dd2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/41aafca57de4a4c026701622bd4648f112a9edcd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4820847e036ff1035b01b69ad68dfc17e7028fe9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6a3ec6efbc4f90e0ccb2e71574f07351f19996f4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6aa9841d917532d0f2d932d1ff2f3a94305aaf47"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/88d386243ed374ac969dabd3bbc1409a31d81818"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aca3ad0c262f54a5b5c95dda80a48365997d1224"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/df6f995358dc1f3c42484f5cfe241d7bd3e1cd15"
    }
  ],
  "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"
    }
  ]
}



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