github - ghsa-mhrx-xqmx-r77g

GHSA-MHRX-XQMX-R77G

Vulnerability from github – Published: 2025-10-09 15:31 – Updated: 2025-10-09 15:31

Details

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

rxrpc: Fix untrusted unsigned subtract

Fix the following Smatch static checker warning:

net/rxrpc/rxgk_app.c:65 rxgk_yfs_decode_ticket() warn: untrusted unsigned subtract. 'ticket_len - 10 * 4'

by prechecking the length of what we're trying to extract in two places in the token and decoding for a response packet.

Also use sizeof() on the struct we're extracting rather specifying the size numerically to be consistent with the other related statements.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-39962"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-09T13:15:32Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Fix untrusted unsigned subtract\n\nFix the following Smatch static checker warning:\n\n   net/rxrpc/rxgk_app.c:65 rxgk_yfs_decode_ticket()\n   warn: untrusted unsigned subtract. \u0027ticket_len - 10 * 4\u0027\n\nby prechecking the length of what we\u0027re trying to extract in two places in\nthe token and decoding for a response packet.\n\nAlso use sizeof() on the struct we\u0027re extracting rather specifying the size\nnumerically to be consistent with the other related statements.",
  "id": "GHSA-mhrx-xqmx-r77g",
  "modified": "2025-10-09T15:31:03Z",
  "published": "2025-10-09T15:31:03Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39962"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2429a197648178cd4dc930a9d87c13c547460564"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/71571e187106631a8127f2dde780f35caa358d33"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2025-39962 (GCVE-0-2025-39962)

Vulnerability from cvelistv5 – Published: 2025-10-09 12:13 – Updated: 2025-10-09 12:13

Title

rxrpc: Fix untrusted unsigned subtract

Summary

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix untrusted unsigned subtract Fix the following Smatch static checker warning: net/rxrpc/rxgk_app.c:65 rxgk_yfs_decode_ticket() warn: untrusted unsigned subtract. 'ticket_len - 10 * 4' by prechecking the length of what we're trying to extract in two places in the token and decoding for a response packet. Also use sizeof() on the struct we're extracting rather specifying the size numerically to be consistent with the other related statements.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/71571e187106631a8…
	https://git.kernel.org/stable/c/2429a197648178cd4…

Impacted products

Vendor

Product

Version

Linux

Affected: 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a , < 71571e187106631a8127f2dde780f35caa358d33 (git)
Affected: 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a , < 2429a197648178cd4dc930a9d87c13c547460564 (git)

Linux

Affected: 6.16
Unaffected: 0 , < 6.16 (semver)
Unaffected: 6.16.9 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)

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          "programFiles": [
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          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "71571e187106631a8127f2dde780f35caa358d33",
              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "2429a197648178cd4dc930a9d87c13c547460564",
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            },
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            },
            {
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              "versionType": "original_commit_for_fix"
            }
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          "nodes": [
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      "providerMetadata": {
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    "datePublished": "2025-10-09T12:13:22.684Z",
    "dateReserved": "2025-04-16T07:20:57.149Z",
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Sightings

Author	Source	Type	Date

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-MHRX-XQMX-R77G

CVE-2025-39962 (GCVE-0-2025-39962)

Tags

Sightings

Nomenclature