{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-53006",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-53006"
  ],
  "published": "2026-06-24T16:31:02Z",
  "summary": "ipv6: fix possible UAF in icmpv6_rcv()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: fix possible UAF in icmpv6_rcv()\n\nCaching saddr and daddr before pskb_pull() is problematic\nsince skb->head can change.\n\nRemove these temporary variables:\n\n- We only access &ipv6_hdr(skb)->saddr and &ipv6_hdr(skb)->daddr\n  when net_dbg_ratelimited() is called in the slow path.\n\n- Avoid potential future misuse after pskb_pull() call.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
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      "url": "https://www.cve.org/CVERecord?id=CVE-2026-53006"
    },
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      "url": "https://git.kernel.org/stable/c/7bff2c8fe5c35ae58bf73104f53db3676e6e5d94"
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    "upstream_modified": "2026-08-05T13:16:28Z",
    "severity": {
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      "scenario": "AV:N - icmpv6_rcv() is reached by inbound IPv6 ICMPv6 packets through the normal network receive path. A remote IPv6 peer can send crafted ICMPv6 packets to a reachable host without local access.\nAC:L - The attacker can craft the ICMPv6 type, checksum, and fragmentation/non-linear skb layout needed to reach the stale-pointer path after pskb_pull(). There is no attacker-uncontrolled race required.\nPR:N - Inbound ICMPv6 processing occurs before any user authentication or privilege check. No local account or kernel capability is required to send the triggering packets.\nUI:N - No victim user action is required. The kernel processes the packets automatically on receive.\nS:U - The impact is within the vulnerable kernel/network stack security authority. This is not a guest-to-host escape or other cross-scope boundary bypass.\nC:H - The bug is a use-after-free of IPv6 address pointers into skb->head after pskb_pull() can reallocate and free that buffer. Under the required conservative kernel guidance, UAF is treated as high confidentiality impact due potential freed-kernel-memory disclosure.\nI:H - This is a kernel heap use-after-free in a remote packet-processing path. Under the required conservative kernel guidance, UAF is treated as high integrity impact because heap reuse/spraying can make UAFs exploitable beyond the immediate stale read.\nA:H - A remotely triggerable kernel UAF can produce an oops/panic or repeated fault, especially in debug/KASAN or hardened deployments. Repeated crafted packets can therefore cause high availability impact."
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}