FKIE_CVE-2025-38546

Vulnerability from fkie_nvd - Published: 2025-08-16 12:15 - Updated: 2026-01-07 18:33
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: clip: Fix memory leak of struct clip_vcc. ioctl(ATMARP_MKIP) allocates struct clip_vcc and set it to vcc->user_back. The code assumes that vcc_destroy_socket() passes NULL skb to vcc->push() when the socket is close()d, and then clip_push() frees clip_vcc. However, ioctl(ATMARPD_CTRL) sets NULL to vcc->push() in atm_init_atmarp(), resulting in memory leak. Let's serialise two ioctl() by lock_sock() and check vcc->push() in atm_init_atmarp() to prevent memleak.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0c17ff462d98c997d707ee5cf4e4a9b1b52b9d90Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1c075e88d5859a2c6b43b27e0e46fb281cef8039Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1fb9fb5a4b5cec2d56e26525ef8c519de858fa60Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2fb37ab3226606cbfc9b2b6f9e301b0b735734c5Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/62dba28275a9a3104d4e33595c7b3328d4032d8dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9e4dbeee56f614e3f1e166e5d0655a999ea185efPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9f771816f14da6d6157a8c30069091abf6b566fbPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cb2e4a2f8f268d8fba6662f663a2e57846f14a8dPatch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlThird Party Advisory, Mailing List
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlThird Party Advisory, Mailing List
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
linux linux_kernel 6.16
linux linux_kernel 6.16
linux linux_kernel 6.16
debian debian_linux 11.0
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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\natm: clip: Fix memory leak of struct clip_vcc.\n\nioctl(ATMARP_MKIP) allocates struct clip_vcc and set it to\nvcc-\u003euser_back.\n\nThe code assumes that vcc_destroy_socket() passes NULL skb\nto vcc-\u003epush() when the socket is close()d, and then clip_push()\nfrees clip_vcc.\n\nHowever, ioctl(ATMARPD_CTRL) sets NULL to vcc-\u003epush() in\natm_init_atmarp(), resulting in memory leak.\n\nLet\u0027s serialise two ioctl() by lock_sock() and check vcc-\u003epush()\nin atm_init_atmarp() to prevent memleak."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: atm: clip: Se corrige la fuga de memoria de la estructura clip_vcc. ioctl(ATMARP_MKIP) asigna la estructura clip_vcc y la establece en vcc-\u0026gt;user_back. El c\u00f3digo asume que vcc_destroy_socket() pasa un skb nulo a vcc-\u0026gt;push() cuando se cierra el socket, y que clip_push() libera clip_vcc. Sin embargo, ioctl(ATMARPD_CTRL) establece vcc-\u0026gt;push() en nulo en atm_init_atmarp(), lo que provoca una fuga de memoria. Serialicemos dos ioctl() mediante lock_sock() y comprobemos vcc-\u0026gt;push() en atm_init_atmarp() para evitar fugas de memoria."
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  "id": "CVE-2025-38546",
  "lastModified": "2026-01-07T18:33:27.997",
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          "confidentialityImpact": "NONE",
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Sightings

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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.
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  • 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.