GHSA-3C34-Q5W8-C59M

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-17 06:33
VLAI
Details

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

net: qrtr: fix 32-bit integer overflow in qrtr_endpoint_post()

qrtr_endpoint_post() validates an incoming packet with

if (!size || len != ALIGN(size, 4) + hdrlen)
    goto err;

where size comes from the wire. On 32-bit, size_t is 32 bits and ALIGN(size, 4) wraps to 0 for size >= 0xfffffffd, so the check passes and skb_put_data(skb, data + hdrlen, size) writes past the hdrlen-sized skb and oopses the kernel. 64-bit is unaffected.

This is the 32-bit residual of ad9d24c9429e2 ("net: qrtr: fix OOB Read in qrtr_endpoint_post"), which fixed only the 64-bit case.

Reject any size that cannot fit the buffer before the ALIGN.

Severity
8.4 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2026-72298"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:22:02Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qrtr: fix 32-bit integer overflow in qrtr_endpoint_post()\n\nqrtr_endpoint_post() validates an incoming packet with\n\n\tif (!size || len != ALIGN(size, 4) + hdrlen)\n\t\tgoto err;\n\nwhere size comes from the wire. On 32-bit, size_t is 32 bits and\nALIGN(size, 4) wraps to 0 for size \u003e= 0xfffffffd, so the check\npasses and skb_put_data(skb, data + hdrlen, size) writes past the\nhdrlen-sized skb and oopses the kernel. 64-bit is unaffected.\n\nThis is the 32-bit residual of ad9d24c9429e2 (\"net: qrtr: fix OOB\nRead in qrtr_endpoint_post\"), which fixed only the 64-bit case.\n\nReject any size that cannot fit the buffer before the ALIGN.",
  "id": "GHSA-3c34-q5w8-c59m",
  "modified": "2026-08-17T06:33:22Z",
  "published": "2026-08-15T06:32:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72298"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/20054869770c7df060c5ecee3e8bbf9029c47191"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/22100a8f73d4ae4f17697dae93d4e2e1d283a6ec"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/242408b5b763c01288adf3113cbce84378a76e1a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3665e644ea081c4624a1637023b0de3b29f4ae04"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/689b7267f8632b4661879dc323e26ebb60978afb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7f72c285f6d3bf63968a0344beee8ab1b370198b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b609f7f46916c6b05585ca82455077198a23770f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d0597074e99731fdad5593e4f6d056a3866f2cab"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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