CVE-2022-50310 (GCVE-0-2022-50310)
Vulnerability from cvelistv5
Published
2025-09-15 14:46
Modified
2025-09-15 14:46
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ip6mr: fix UAF issue in ip6mr_sk_done() when addrconf_init_net() failed If the initialization fails in calling addrconf_init_net(), devconf_all is the pointer that has been released. Then ip6mr_sk_done() is called to release the net, accessing devconf->mc_forwarding directly causes invalid pointer access. The process is as follows: setup_net() ops_init() addrconf_init_net() all = kmemdup(...) ---> alloc "all" ... net->ipv6.devconf_all = all; __addrconf_sysctl_register() ---> failed ... kfree(all); ---> ipv6.devconf_all invalid ... ops_exit_list() ... ip6mr_sk_done() devconf = net->ipv6.devconf_all; //devconf is invalid pointer if (!devconf || !atomic_read(&devconf->mc_forwarding)) The following is the Call Trace information: BUG: KASAN: use-after-free in ip6mr_sk_done+0x112/0x3a0 Read of size 4 at addr ffff888075508e88 by task ip/14554 Call Trace: <TASK> dump_stack_lvl+0x8e/0xd1 print_report+0x155/0x454 kasan_report+0xba/0x1f0 kasan_check_range+0x35/0x1b0 ip6mr_sk_done+0x112/0x3a0 rawv6_close+0x48/0x70 inet_release+0x109/0x230 inet6_release+0x4c/0x70 sock_release+0x87/0x1b0 igmp6_net_exit+0x6b/0x170 ops_exit_list+0xb0/0x170 setup_net+0x7ac/0xbd0 copy_net_ns+0x2e6/0x6b0 create_new_namespaces+0x382/0xa50 unshare_nsproxy_namespaces+0xa6/0x1c0 ksys_unshare+0x3a4/0x7e0 __x64_sys_unshare+0x2d/0x40 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f7963322547 </TASK> Allocated by task 14554: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 __kasan_kmalloc+0xa1/0xb0 __kmalloc_node_track_caller+0x4a/0xb0 kmemdup+0x28/0x60 addrconf_init_net+0x1be/0x840 ops_init+0xa5/0x410 setup_net+0x5aa/0xbd0 copy_net_ns+0x2e6/0x6b0 create_new_namespaces+0x382/0xa50 unshare_nsproxy_namespaces+0xa6/0x1c0 ksys_unshare+0x3a4/0x7e0 __x64_sys_unshare+0x2d/0x40 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Freed by task 14554: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 kasan_save_free_info+0x2a/0x40 ____kasan_slab_free+0x155/0x1b0 slab_free_freelist_hook+0x11b/0x220 __kmem_cache_free+0xa4/0x360 addrconf_init_net+0x623/0x840 ops_init+0xa5/0x410 setup_net+0x5aa/0xbd0 copy_net_ns+0x2e6/0x6b0 create_new_namespaces+0x382/0xa50 unshare_nsproxy_namespaces+0xa6/0x1c0 ksys_unshare+0x3a4/0x7e0 __x64_sys_unshare+0x2d/0x40 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1ca695207ed2271ecbf8ee6c641970f621c157cc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/22a68c3b9362eaac7b035eba09e95e6b3f7a912c
Impacted products
Vendor Product Version
Linux Linux Version: 7d9b1b578d67a14ae7a7a526ee115b233fa264c4
Version: 7d9b1b578d67a14ae7a7a526ee115b233fa264c4
 Create a notification for this product.
   Linux Linux Version: 5.18
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ipv6/addrconf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "22a68c3b9362eaac7b035eba09e95e6b3f7a912c",
              "status": "affected",
              "version": "7d9b1b578d67a14ae7a7a526ee115b233fa264c4",
              "versionType": "git"
            },
            {
              "lessThan": "1ca695207ed2271ecbf8ee6c641970f621c157cc",
              "status": "affected",
              "version": "7d9b1b578d67a14ae7a7a526ee115b233fa264c4",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/ipv6/addrconf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.18"
            },
            {
              "lessThan": "5.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.6",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nip6mr: fix UAF issue in ip6mr_sk_done() when addrconf_init_net() failed\n\nIf the initialization fails in calling addrconf_init_net(), devconf_all is\nthe pointer that has been released. Then ip6mr_sk_done() is called to\nrelease the net, accessing devconf-\u003emc_forwarding directly causes invalid\npointer access.\n\nThe process is as follows:\nsetup_net()\n\tops_init()\n\t\taddrconf_init_net()\n\t\tall = kmemdup(...)           ---\u003e alloc \"all\"\n\t\t...\n\t\tnet-\u003eipv6.devconf_all = all;\n\t\t__addrconf_sysctl_register() ---\u003e failed\n\t\t...\n\t\tkfree(all);                  ---\u003e ipv6.devconf_all invalid\n\t\t...\n\tops_exit_list()\n\t\t...\n\t\tip6mr_sk_done()\n\t\t\tdevconf = net-\u003eipv6.devconf_all;\n\t\t\t//devconf is invalid pointer\n\t\t\tif (!devconf || !atomic_read(\u0026devconf-\u003emc_forwarding))\n\nThe following is the Call Trace information:\nBUG: KASAN: use-after-free in ip6mr_sk_done+0x112/0x3a0\nRead of size 4 at addr ffff888075508e88 by task ip/14554\nCall Trace:\n\u003cTASK\u003e\ndump_stack_lvl+0x8e/0xd1\nprint_report+0x155/0x454\nkasan_report+0xba/0x1f0\nkasan_check_range+0x35/0x1b0\nip6mr_sk_done+0x112/0x3a0\nrawv6_close+0x48/0x70\ninet_release+0x109/0x230\ninet6_release+0x4c/0x70\nsock_release+0x87/0x1b0\nigmp6_net_exit+0x6b/0x170\nops_exit_list+0xb0/0x170\nsetup_net+0x7ac/0xbd0\ncopy_net_ns+0x2e6/0x6b0\ncreate_new_namespaces+0x382/0xa50\nunshare_nsproxy_namespaces+0xa6/0x1c0\nksys_unshare+0x3a4/0x7e0\n__x64_sys_unshare+0x2d/0x40\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0\nRIP: 0033:0x7f7963322547\n\n\u003c/TASK\u003e\nAllocated by task 14554:\nkasan_save_stack+0x1e/0x40\nkasan_set_track+0x21/0x30\n__kasan_kmalloc+0xa1/0xb0\n__kmalloc_node_track_caller+0x4a/0xb0\nkmemdup+0x28/0x60\naddrconf_init_net+0x1be/0x840\nops_init+0xa5/0x410\nsetup_net+0x5aa/0xbd0\ncopy_net_ns+0x2e6/0x6b0\ncreate_new_namespaces+0x382/0xa50\nunshare_nsproxy_namespaces+0xa6/0x1c0\nksys_unshare+0x3a4/0x7e0\n__x64_sys_unshare+0x2d/0x40\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nFreed by task 14554:\nkasan_save_stack+0x1e/0x40\nkasan_set_track+0x21/0x30\nkasan_save_free_info+0x2a/0x40\n____kasan_slab_free+0x155/0x1b0\nslab_free_freelist_hook+0x11b/0x220\n__kmem_cache_free+0xa4/0x360\naddrconf_init_net+0x623/0x840\nops_init+0xa5/0x410\nsetup_net+0x5aa/0xbd0\ncopy_net_ns+0x2e6/0x6b0\ncreate_new_namespaces+0x382/0xa50\nunshare_nsproxy_namespaces+0xa6/0x1c0\nksys_unshare+0x3a4/0x7e0\n__x64_sys_unshare+0x2d/0x40\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-15T14:46:05.486Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/22a68c3b9362eaac7b035eba09e95e6b3f7a912c"
        },
        {
          "url": "https://git.kernel.org/stable/c/1ca695207ed2271ecbf8ee6c641970f621c157cc"
        }
      ],
      "title": "ip6mr: fix UAF issue in ip6mr_sk_done() when addrconf_init_net() failed",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50310",
    "datePublished": "2025-09-15T14:46:05.486Z",
    "dateReserved": "2025-09-15T14:18:36.813Z",
    "dateUpdated": "2025-09-15T14:46:05.486Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50310\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-15T15:15:42.750\",\"lastModified\":\"2025-09-15T15:22:27.090\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nip6mr: fix UAF issue in ip6mr_sk_done() when addrconf_init_net() failed\\n\\nIf the initialization fails in calling addrconf_init_net(), devconf_all is\\nthe pointer that has been released. Then ip6mr_sk_done() is called to\\nrelease the net, accessing devconf-\u003emc_forwarding directly causes invalid\\npointer access.\\n\\nThe process is as follows:\\nsetup_net()\\n\\tops_init()\\n\\t\\taddrconf_init_net()\\n\\t\\tall = kmemdup(...)           ---\u003e alloc \\\"all\\\"\\n\\t\\t...\\n\\t\\tnet-\u003eipv6.devconf_all = all;\\n\\t\\t__addrconf_sysctl_register() ---\u003e failed\\n\\t\\t...\\n\\t\\tkfree(all);                  ---\u003e ipv6.devconf_all invalid\\n\\t\\t...\\n\\tops_exit_list()\\n\\t\\t...\\n\\t\\tip6mr_sk_done()\\n\\t\\t\\tdevconf = net-\u003eipv6.devconf_all;\\n\\t\\t\\t//devconf is invalid pointer\\n\\t\\t\\tif (!devconf || !atomic_read(\u0026devconf-\u003emc_forwarding))\\n\\nThe following is the Call Trace information:\\nBUG: KASAN: use-after-free in ip6mr_sk_done+0x112/0x3a0\\nRead of size 4 at addr ffff888075508e88 by task ip/14554\\nCall Trace:\\n\u003cTASK\u003e\\ndump_stack_lvl+0x8e/0xd1\\nprint_report+0x155/0x454\\nkasan_report+0xba/0x1f0\\nkasan_check_range+0x35/0x1b0\\nip6mr_sk_done+0x112/0x3a0\\nrawv6_close+0x48/0x70\\ninet_release+0x109/0x230\\ninet6_release+0x4c/0x70\\nsock_release+0x87/0x1b0\\nigmp6_net_exit+0x6b/0x170\\nops_exit_list+0xb0/0x170\\nsetup_net+0x7ac/0xbd0\\ncopy_net_ns+0x2e6/0x6b0\\ncreate_new_namespaces+0x382/0xa50\\nunshare_nsproxy_namespaces+0xa6/0x1c0\\nksys_unshare+0x3a4/0x7e0\\n__x64_sys_unshare+0x2d/0x40\\ndo_syscall_64+0x35/0x80\\nentry_SYSCALL_64_after_hwframe+0x46/0xb0\\nRIP: 0033:0x7f7963322547\\n\\n\u003c/TASK\u003e\\nAllocated by task 14554:\\nkasan_save_stack+0x1e/0x40\\nkasan_set_track+0x21/0x30\\n__kasan_kmalloc+0xa1/0xb0\\n__kmalloc_node_track_caller+0x4a/0xb0\\nkmemdup+0x28/0x60\\naddrconf_init_net+0x1be/0x840\\nops_init+0xa5/0x410\\nsetup_net+0x5aa/0xbd0\\ncopy_net_ns+0x2e6/0x6b0\\ncreate_new_namespaces+0x382/0xa50\\nunshare_nsproxy_namespaces+0xa6/0x1c0\\nksys_unshare+0x3a4/0x7e0\\n__x64_sys_unshare+0x2d/0x40\\ndo_syscall_64+0x35/0x80\\nentry_SYSCALL_64_after_hwframe+0x46/0xb0\\n\\nFreed by task 14554:\\nkasan_save_stack+0x1e/0x40\\nkasan_set_track+0x21/0x30\\nkasan_save_free_info+0x2a/0x40\\n____kasan_slab_free+0x155/0x1b0\\nslab_free_freelist_hook+0x11b/0x220\\n__kmem_cache_free+0xa4/0x360\\naddrconf_init_net+0x623/0x840\\nops_init+0xa5/0x410\\nsetup_net+0x5aa/0xbd0\\ncopy_net_ns+0x2e6/0x6b0\\ncreate_new_namespaces+0x382/0xa50\\nunshare_nsproxy_namespaces+0xa6/0x1c0\\nksys_unshare+0x3a4/0x7e0\\n__x64_sys_unshare+0x2d/0x40\\ndo_syscall_64+0x35/0x80\\nentry_SYSCALL_64_after_hwframe+0x46/0xb0\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1ca695207ed2271ecbf8ee6c641970f621c157cc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/22a68c3b9362eaac7b035eba09e95e6b3f7a912c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.