FKIE_CVE-2025-38190

Vulnerability from fkie_nvd - Published: 2025-07-04 14:15 - Updated: 2025-12-18 17:24
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: atm: Revert atm_account_tx() if copy_from_iter_full() fails. In vcc_sendmsg(), we account skb->truesize to sk->sk_wmem_alloc by atm_account_tx(). It is expected to be reverted by atm_pop_raw() later called by vcc->dev->ops->send(vcc, skb). However, vcc_sendmsg() misses the same revert when copy_from_iter_full() fails, and then we will leak a socket. Let's factorise the revert part as atm_return_tx() and call it in the failure path. Note that the corresponding sk_wmem_alloc operation can be found in alloc_tx() as of the blamed commit. $ git blame -L:alloc_tx net/atm/common.c c55fa3cccbc2c~
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2252c539c43f9a1431a7e8b34e3c18e9dd77a96dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/287b4f085d2ca3375cf1ee672af27410c64777e8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3902205eadf35db59dbc2186c2a98b9e6182efa5Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3d828519bd69bfcaabdd942a872679617ef06739Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5e0d00992118e234ebf29d5145c1cc920342777ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7851263998d4269125fd6cb3fdbfc7c6db853859Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7d6bc28cfe5c8e3a279b4b4bdeed6698b2702685Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c12430edd92fd49a4800b0f3fb395b50cb16bcc1Patch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlThird Party Advisory
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 2.6.12
linux linux_kernel 2.6.12
linux linux_kernel 2.6.12
linux linux_kernel 2.6.12
linux linux_kernel 2.6.12
linux linux_kernel 6.16
linux linux_kernel 6.16
debian debian_linux 11.0
To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\natm: Revert atm_account_tx() if copy_from_iter_full() fails.\n\nIn vcc_sendmsg(), we account skb-\u003etruesize to sk-\u003esk_wmem_alloc by\natm_account_tx().\n\nIt is expected to be reverted by atm_pop_raw() later called by\nvcc-\u003edev-\u003eops-\u003esend(vcc, skb).\n\nHowever, vcc_sendmsg() misses the same revert when copy_from_iter_full()\nfails, and then we will leak a socket.\n\nLet\u0027s factorise the revert part as atm_return_tx() and call it in\nthe failure path.\n\nNote that the corresponding sk_wmem_alloc operation can be found in\nalloc_tx() as of the blamed commit.\n\n  $ git blame -L:alloc_tx net/atm/common.c c55fa3cccbc2c~"
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      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: atm: Revertir atm_account_tx() si copy_from_iter_full() falla. En vcc_sendmsg(), contabilizamos skb-\u0026gt;truesize como sk-\u0026gt;sk_wmem_alloc mediante atm_account_tx(). Se espera que sea revertido por atm_pop_raw(), posteriormente llamado por vcc-\u0026gt;dev-\u0026gt;ops-\u0026gt;send(vcc, skb). Sin embargo, vcc_sendmsg() no realiza la misma reversi\u00f3n cuando copy_from_iter_full() falla, y entonces se filtrar\u00e1 un socket. Factoricemos la parte de la reversi\u00f3n como atm_return_tx() y la llamemos en la ruta de error. Tenga en cuenta que la operaci\u00f3n sk_wmem_alloc correspondiente se puede encontrar en alloc_tx() a partir de la confirmaci\u00f3n culpable. $ git culpa -L:alloc_tx net/atm/common.c c55fa3ccccc2c~"
    }
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  "id": "CVE-2025-38190",
  "lastModified": "2025-12-18T17:24:15.413",
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          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
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        "impactScore": 3.6,
        "source": "nvd@nist.gov",
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  "published": "2025-07-04T14:15:26.017",
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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.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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