{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.187-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.105-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.1.8-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux-6.12"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.107-1~deb12u1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  netfilter: nf_conntrack_sip: widen NAT rewrite delta to s32 in sip_help_tcp()  sip_help_tcp() stores the size change of each NAT-rewritten SIP message in s16 diff and accumulates it in s16 tdiff, but a single message can grow by more than S16_MAX while the packet stays under the 65535 enlarge_skb() limit: nf_nat_sip() rewrites every matching URI, and a long Contact list expands the message by tens of kilobytes. diff then wraps, and \"datalen = datalen + diff - msglen\" yields a huge unsigned datalen, so the next iteration's ct_sip_get_header() reads past the linearized skb tail.  Widen diff, tdiff and the seq_adjust hook to s32. Both are bounded by the 65535 byte packet limit, and the seqadj core is already s32 (nf_ct_seqadj_set() takes s32), so no previously accepted input is rejected.    BUG: KASAN: use-after-free in ct_sip_get_header (net/netfilter/nf_conntrack_sip.c:464)   Read of size 1 at addr ffff888010800000 by task ksoftirqd/1/25    ct_sip_get_header (net/netfilter/nf_conntrack_sip.c:464)    sip_help_tcp (net/netfilter/nf_conntrack_sip.c:1694)    nf_confirm (net/netfilter/nf_conntrack_proto.c:183)    nf_hook_slow (net/netfilter/core.c:619)    ip6_output (net/ipv6/ip6_output.c:246)    ip6_forward (net/ipv6/ip6_output.c:690)    ipv6_rcv (net/ipv6/ip6_input.c:351)    __netif_receive_skb_one_core (net/core/dev.c:6212)    process_backlog (net/core/dev.c:6676)    __napi_poll (net/core/dev.c:7735)    net_rx_action (net/core/dev.c:7955)    handle_softirqs (kernel/softirq.c:622)    run_ksoftirqd (kernel/softirq.c:1076)    ...",
  "id": "DEBIAN-CVE-2026-74569",
  "modified": "2026-09-19T21:47:25.445073003Z",
  "published": "2026-08-15T13:18:02.517Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-74569"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-74569"
  ]
}