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

Vulnerability from cvelistv5 – Published: 2025-10-09 12:13 – Updated: 2025-10-09 12:13
VLAI?
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
Impacted products
Vendor Product Version
Linux Linux Affected: 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a , < 71571e187106631a8127f2dde780f35caa358d33 (git)
Affected: 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a , < 2429a197648178cd4dc930a9d87c13c547460564 (git)
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    Linux 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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          "value": "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."
        }
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      "providerMetadata": {
        "dateUpdated": "2025-10-09T12:13:22.684Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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        {
          "url": "https://git.kernel.org/stable/c/2429a197648178cd4dc930a9d87c13c547460564"
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39962",
    "datePublished": "2025-10-09T12:13:22.684Z",
    "dateReserved": "2025-04-16T07:20:57.149Z",
    "dateUpdated": "2025-10-09T12:13:22.684Z",
    "state": "PUBLISHED"
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  }
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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