{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "eee2fa6ab3225192d6d894c54a6fb02ac9efdff6"
            },
            {
              "fixed": "f8a8977af2134a1d91e5f9773cb7d9d53278c830"
            },
            {
              "fixed": "ba95bce5dfe6e2ef602a87e0557225f2934ccb5c"
            },
            {
              "fixed": "c4933624a6f416ecfcc31ab58d585da1207a0597"
            },
            {
              "fixed": "76dd48886eeeb5fcf2b837d2f4c3d17eebeac9ef"
            },
            {
              "fixed": "f0d1fb05d70c8a561cd8d0473bcacafa2fc137ff"
            },
            {
              "fixed": "b1d480fce05f857dc438080cd8c9244b84a83494"
            },
            {
              "fixed": "8398bc477d3cb3e2b018a5aaac2bec0f69acda30"
            },
            {
              "fixed": "78f75d632f74b8de0f081a128588f7c37d0d1164"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.19.0"
            },
            {
              "fixed": "5.10.265"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.216"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.183"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.151"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.103"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.44"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74563.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nrds: tcp: hold the RCU lock across ipv6_chk_addr() in rds_tcp_laddr_check()\n\nrds_tcp_laddr_check() looks up a scoped IPv6 interface with\ndev_get_by_index_rcu(), drops the RCU read-side lock, and only then\npasses the bare struct net_device * into ipv6_chk_addr().\n\ndev_get_by_index_rcu() only keeps the device alive within the same RCU\nread-side section. After rcu_read_unlock(), a concurrent RTM_DELLINK can\nfree the net_device; ipv6_chk_addr() then dereferences the stale pointer\nin __ipv6_chk_addr_and_flags() (e.g. l3mdev_master_dev_rcu(dev)), reading\nfreed memory.\n\nKeep the RCU read-side lock held across the ipv6_chk_addr() call instead\nof dropping it right after the lookup, so the device cannot be freed\nwhile it is in use.\n\n  BUG: KASAN: slab-use-after-free in __ipv6_chk_addr_and_flags (... net/ipv6/addrconf.c:1998)\n  Read of size 8 at addr ffff8880106ec000 by task exploit/153\n  Call Trace:\n   ...\n   kasan_report (mm/kasan/report.c:595)\n   __ipv6_chk_addr_and_flags (... net/ipv6/addrconf.c:1998)\n   ipv6_chk_addr (net/ipv6/addrconf.c:2031 net/ipv6/addrconf.c:1972)\n   rds_tcp_laddr_check (net/rds/tcp.c:370)\n   rds_bind (net/rds/bind.c:248)\n   __sys_bind (net/socket.c:1920)\n   __x64_sys_bind (net/socket.c:1956)\n   do_syscall_64 (arch/x86/entry/syscall_64.c:63)\n   entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)",
  "id": "CVE-2026-74563",
  "modified": "2026-08-21T03:30:13.468970578Z",
  "published": "2026-08-15T12:28:05.768Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/76dd48886eeeb5fcf2b837d2f4c3d17eebeac9ef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/78f75d632f74b8de0f081a128588f7c37d0d1164"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8398bc477d3cb3e2b018a5aaac2bec0f69acda30"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b1d480fce05f857dc438080cd8c9244b84a83494"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ba95bce5dfe6e2ef602a87e0557225f2934ccb5c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c4933624a6f416ecfcc31ab58d585da1207a0597"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f0d1fb05d70c8a561cd8d0473bcacafa2fc137ff"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f8a8977af2134a1d91e5f9773cb7d9d53278c830"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74563.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74563"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "rds: tcp: hold the RCU lock across ipv6_chk_addr() in rds_tcp_laddr_check()"
}