GHSA-PP5X-P5CV-W76C

Vulnerability from github – Published: 2026-10-06 09:31 – Updated: 2026-10-06 09:31
VLAI
Details

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

wifi: libipw: reject too-short beacon and probe responses

libipw_process_probe_response() and the libipw_network_init() call it makes assume the frame contains the full 36-byte beacon and probe response prefix, but the ipw2100 and ipw2200 receive paths only establish that a management frame carries the generic 24-byte three-address header.

libipw_network_init() then computes the information element length as

stats->len - sizeof(*beacon)

stats->len is a u16 and sizeof() has type size_t, so the subtraction is evaluated as size_t and wraps instead of going negative. Truncating that to the u16 length parameter of libipw_parse_info_param() yields 65524 for a 24-byte beacon, and the parser then walks the receive buffer as if it held almost 64 KiB of information elements, reading past the allocation.

Reject the frame before any fixed field is touched.

Found by an AI-assisted review of length arithmetic in management frame parsers. Verified with a KUnit case under Generic KASAN on arm64 under QEMU; I do not have the hardware, so it is not tested on a real device.

Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2026-98349"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-06T09:18:28Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: libipw: reject too-short beacon and probe responses\n\nlibipw_process_probe_response() and the libipw_network_init() call it\nmakes assume the frame contains the full 36-byte beacon and probe\nresponse prefix, but the ipw2100 and ipw2200 receive paths only\nestablish that a management frame carries the generic 24-byte\nthree-address header.\n\nlibipw_network_init() then computes the information element length as\n\n\tstats-\u003elen - sizeof(*beacon)\n\nstats-\u003elen is a u16 and sizeof() has type size_t, so the subtraction is\nevaluated as size_t and wraps instead of going negative.  Truncating\nthat to the u16 length parameter of libipw_parse_info_param() yields\n65524 for a 24-byte beacon, and the parser then walks the receive\nbuffer as if it held almost 64 KiB of information elements, reading\npast the allocation.\n\nReject the frame before any fixed field is touched.\n\nFound by an AI-assisted review of length arithmetic in management frame\nparsers.  Verified with a KUnit case under Generic KASAN on arm64 under\nQEMU; I do not have the hardware, so it is not tested on a real device.",
  "id": "GHSA-pp5x-p5cv-w76c",
  "modified": "2026-10-06T09:31:36Z",
  "published": "2026-10-06T09:31:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98349"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/14ae269c1306053ddf1ccf37c4bd66e085a652d1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/19959fb60228f6dccc40d55507f8b1a751c2dc89"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/23afeb5d2bdfd34c8a0a661876291a4fa9978293"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2c87bbc00dc93149d1dc4f803ad92d92e4ef3758"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5ce5721e8cbe3e80db8f43851cc2a2a92485ef4b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/89959ff00a978f3172726d3d5f861ee6f1aae26d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cee6f141b3bebe62eb0363fd147acb52023935f0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ff756e6647722b7d225d882f7bdb186d8eee318e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.

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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.