CVE-2022-49766 (GCVE-0-2022-49766)

Vulnerability from cvelistv5 – Published: 2025-05-01 14:09 – Updated: 2026-05-11 19:06
VLAI
Title
netlink: Bounds-check struct nlmsgerr creation
Summary
In the Linux kernel, the following vulnerability has been resolved: netlink: Bounds-check struct nlmsgerr creation In preparation for FORTIFY_SOURCE doing bounds-check on memcpy(), switch from __nlmsg_put to nlmsg_put(), and explain the bounds check for dealing with the memcpy() across a composite flexible array struct. Avoids this future run-time warning: memcpy: detected field-spanning write (size 32) of single field "&errmsg->msg" at net/netlink/af_netlink.c:2447 (size 16)
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < aff4eb16f589c3af322a2582044bca365381fcd6 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 710d21fdff9a98d621cd4e64167f3ef8af4e2fd1 (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 6.0.10 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
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Show details on NVD website
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    "dateReserved": "2025-04-16T07:17:33.804Z",
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetlink: Bounds-check struct nlmsgerr creation\n\nIn preparation for FORTIFY_SOURCE doing bounds-check on memcpy(),\nswitch from __nlmsg_put to nlmsg_put(), and explain the bounds check\nfor dealing with the memcpy() across a composite flexible array struct.\nAvoids this future run-time warning:\n\n  memcpy: detected field-spanning write (size 32) of single field \"\u0026errmsg-\u003emsg\" at net/netlink/af_netlink.c:2447 (size 16)"
          },
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            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netlink: Creaci\u00f3n de la estructura nlmsgerr con comprobaci\u00f3n de los l\u00edmites. En preparaci\u00f3n para que FORTIFY_SOURCE realice la comprobaci\u00f3n de los l\u00edmites en memcpy(), cambie de __nlmsg_put a nlmsg_put() y explique la comprobaci\u00f3n de los l\u00edmites para procesar memcpy() en una estructura de matriz flexible compuesta. Esto evita esta futura advertencia en tiempo de ejecuci\u00f3n: memcpy: se detect\u00f3 una escritura que abarca campos (tama\u00f1o 32) en un solo campo \"\u0026amp;errmsg-\u0026gt;msg\" en net/netlink/af_netlink.c:2447 (tama\u00f1o 16)."
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}



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