{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwireguard: netlink: check for dangling peer via is_dead instead of empty list\n\nIf all peers are removed via wg_peer_remove_all(), rather than setting\npeer_list to empty, the peer is added to a temporary list with a head on\nthe stack of wg_peer_remove_all(). If a netlink dump is resumed and the\ncursored peer is one that has been removed via wg_peer_remove_all(), it\nwill iterate from that peer and then attempt to dump freed peers.\n\nFix this by instead checking peer->is_dead, which was explictly created\nfor this purpose. Also move up the device_update_lock lockdep assertion,\nsince reading is_dead relies on that.\n\nIt can be reproduced by a small script like:\n\n    echo \"Setting config...\"\n    ip link add dev wg0 type wireguard\n    wg setconf wg0 /big-config\n    (\n            while true; do\n                    echo \"Showing config...\"\n                    wg showconf wg0 > /dev/null\n            done\n    ) &\n    sleep 4\n    wg setconf wg0 <(printf \"[Peer]\\nPublicKey=$(wg genkey)\\n\")\n\nResulting in:\n\n    BUG: KASAN: slab-use-after-free in __lock_acquire+0x182a/0x1b20\n    Read of size 8 at addr ffff88811956ec70 by task wg/59\n    CPU: 2 PID: 59 Comm: wg Not tainted 6.8.0-rc2-debug+ #5\n    Call Trace:\n     <TASK>\n     dump_stack_lvl+0x47/0x70\n     print_address_description.constprop.0+0x2c/0x380\n     print_report+0xab/0x250\n     kasan_report+0xba/0xf0\n     __lock_acquire+0x182a/0x1b20\n     lock_acquire+0x191/0x4b0\n     down_read+0x80/0x440\n     get_peer+0x140/0xcb0\n     wg_get_device_dump+0x471/0x1130"
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/net/wireguard/netlink.c"
               ],
               "versions": [
                  {
                     "version": "e7096c131e51",
                     "lessThan": "f52be46e3e6e",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "e7096c131e51",
                     "lessThan": "710a177f3472",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "e7096c131e51",
                     "lessThan": "b7cea3a9af08",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "e7096c131e51",
                     "lessThan": "13d107794304",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "e7096c131e51",
                     "lessThan": "7bedfe4cfa38",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "e7096c131e51",
                     "lessThan": "302b2dfc013b",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "e7096c131e51",
                     "lessThan": "55b6c7386738",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/net/wireguard/netlink.c"
               ],
               "versions": [
                  {
                     "version": "5.6",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.6",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.215",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15.154",
                     "lessThanOrEqual": "5.15.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.1.84",
                     "lessThanOrEqual": "6.1.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.6.24",
                     "lessThanOrEqual": "6.6.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.7.12",
                     "lessThanOrEqual": "6.7.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.8.3",
                     "lessThanOrEqual": "6.8.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.9",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/f52be46e3e6ecefc2539119784324f0cbc09620a"
            },
            {
               "url": "https://git.kernel.org/stable/c/710a177f347282eea162aec8712beb1f42d5ad87"
            },
            {
               "url": "https://git.kernel.org/stable/c/b7cea3a9af0853fdbb1b16633a458f991dde6aac"
            },
            {
               "url": "https://git.kernel.org/stable/c/13d107794304306164481d31ce33f8fdb25a9c04"
            },
            {
               "url": "https://git.kernel.org/stable/c/7bedfe4cfa38771840a355970e4437cd52d4046b"
            },
            {
               "url": "https://git.kernel.org/stable/c/302b2dfc013baca3dea7ceda383930d9297d231d"
            },
            {
               "url": "https://git.kernel.org/stable/c/55b6c738673871c9b0edae05d0c97995c1ff08c4"
            }
         ],
         "title": "wireguard: netlink: check for dangling peer via is_dead instead of empty list",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2024-26951",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}