CVE-2022-50259 (GCVE-0-2022-50259)
Vulnerability from cvelistv5
Published
2025-09-15 14:02
Modified
2025-09-15 14:02
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: fix race in sock_map_free() sock_map_free() calls release_sock(sk) without owning a reference on the socket. This can cause use-after-free as syzbot found [1] Jakub Sitnicki already took care of a similar issue in sock_hash_free() in commit 75e68e5bf2c7 ("bpf, sockhash: Synchronize delete from bucket list on map free") [1] refcount_t: decrement hit 0; leaking memory. WARNING: CPU: 0 PID: 3785 at lib/refcount.c:31 refcount_warn_saturate+0x17c/0x1a0 lib/refcount.c:31 Modules linked in: CPU: 0 PID: 3785 Comm: kworker/u4:6 Not tainted 6.1.0-rc7-syzkaller-00103-gef4d3ea40565 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: events_unbound bpf_map_free_deferred RIP: 0010:refcount_warn_saturate+0x17c/0x1a0 lib/refcount.c:31 Code: 68 8b 31 c0 e8 75 71 15 fd 0f 0b e9 64 ff ff ff e8 d9 6e 4e fd c6 05 62 9c 3d 0a 01 48 c7 c7 80 bb 68 8b 31 c0 e8 54 71 15 fd <0f> 0b e9 43 ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c a2 fe ff RSP: 0018:ffffc9000456fb60 EFLAGS: 00010246 RAX: eae59bab72dcd700 RBX: 0000000000000004 RCX: ffff8880207057c0 RDX: 0000000000000000 RSI: 0000000000000201 RDI: 0000000000000000 RBP: 0000000000000004 R08: ffffffff816fdabd R09: fffff520008adee5 R10: fffff520008adee5 R11: 1ffff920008adee4 R12: 0000000000000004 R13: dffffc0000000000 R14: ffff88807b1c6c00 R15: 1ffff1100f638dcf FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30c30000 CR3: 000000000d08e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> __refcount_dec include/linux/refcount.h:344 [inline] refcount_dec include/linux/refcount.h:359 [inline] __sock_put include/net/sock.h:779 [inline] tcp_release_cb+0x2d0/0x360 net/ipv4/tcp_output.c:1092 release_sock+0xaf/0x1c0 net/core/sock.c:3468 sock_map_free+0x219/0x2c0 net/core/sock_map.c:356 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 </TASK>
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0a182f8d607464911756b4dbef5d6cad8de22469
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4cabc3af4a6f36c222fecb15858c1060e59218e7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5c3568166129bc73fd6b37748d2d8f95cd8f22f3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a443c55d96dede82a724df6e70a318ad15c199e1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/be719496ae6a7fc325e9e5056a52f63ebc84cc0c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e8b2b392a646bf5cb9413c1cc7a39d99c1b65a62
Impacted products
Vendor Product Version
Linux Linux Version: 20ae0cb8983b05136d5293c47fadc99a8ca8ca2d
Version: 7e81a35302066c5a00b4c72d83e3ea4cad6eeb5b
Version: 7e81a35302066c5a00b4c72d83e3ea4cad6eeb5b
Version: 7e81a35302066c5a00b4c72d83e3ea4cad6eeb5b
Version: 7e81a35302066c5a00b4c72d83e3ea4cad6eeb5b
Version: 7e81a35302066c5a00b4c72d83e3ea4cad6eeb5b
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   Linux Linux Version: 5.5
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/core/sock_map.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
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              "status": "affected",
              "version": "7e81a35302066c5a00b4c72d83e3ea4cad6eeb5b",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/core/sock_map.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.5"
            },
            {
              "lessThan": "5.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.229",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.163",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.86",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.229",
                  "versionStartIncluding": "5.4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.163",
                  "versionStartIncluding": "5.5",
                  "vulnerable": true
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                  "versionEndExcluding": "5.15.86",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.16",
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                  "vulnerable": true
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                  "versionEndExcluding": "6.2",
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, sockmap: fix race in sock_map_free()\n\nsock_map_free() calls release_sock(sk) without owning a reference\non the socket. This can cause use-after-free as syzbot found [1]\n\nJakub Sitnicki already took care of a similar issue\nin sock_hash_free() in commit 75e68e5bf2c7 (\"bpf, sockhash:\nSynchronize delete from bucket list on map free\")\n\n[1]\nrefcount_t: decrement hit 0; leaking memory.\nWARNING: CPU: 0 PID: 3785 at lib/refcount.c:31 refcount_warn_saturate+0x17c/0x1a0 lib/refcount.c:31\nModules linked in:\nCPU: 0 PID: 3785 Comm: kworker/u4:6 Not tainted 6.1.0-rc7-syzkaller-00103-gef4d3ea40565 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022\nWorkqueue: events_unbound bpf_map_free_deferred\nRIP: 0010:refcount_warn_saturate+0x17c/0x1a0 lib/refcount.c:31\nCode: 68 8b 31 c0 e8 75 71 15 fd 0f 0b e9 64 ff ff ff e8 d9 6e 4e fd c6 05 62 9c 3d 0a 01 48 c7 c7 80 bb 68 8b 31 c0 e8 54 71 15 fd \u003c0f\u003e 0b e9 43 ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c a2 fe ff\nRSP: 0018:ffffc9000456fb60 EFLAGS: 00010246\nRAX: eae59bab72dcd700 RBX: 0000000000000004 RCX: ffff8880207057c0\nRDX: 0000000000000000 RSI: 0000000000000201 RDI: 0000000000000000\nRBP: 0000000000000004 R08: ffffffff816fdabd R09: fffff520008adee5\nR10: fffff520008adee5 R11: 1ffff920008adee4 R12: 0000000000000004\nR13: dffffc0000000000 R14: ffff88807b1c6c00 R15: 1ffff1100f638dcf\nFS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000001b30c30000 CR3: 000000000d08e000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n\u003cTASK\u003e\n__refcount_dec include/linux/refcount.h:344 [inline]\nrefcount_dec include/linux/refcount.h:359 [inline]\n__sock_put include/net/sock.h:779 [inline]\ntcp_release_cb+0x2d0/0x360 net/ipv4/tcp_output.c:1092\nrelease_sock+0xaf/0x1c0 net/core/sock.c:3468\nsock_map_free+0x219/0x2c0 net/core/sock_map.c:356\nprocess_one_work+0x81c/0xd10 kernel/workqueue.c:2289\nworker_thread+0xb14/0x1330 kernel/workqueue.c:2436\nkthread+0x266/0x300 kernel/kthread.c:376\nret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306\n\u003c/TASK\u003e"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-15T14:02:47.875Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4cabc3af4a6f36c222fecb15858c1060e59218e7"
        },
        {
          "url": "https://git.kernel.org/stable/c/be719496ae6a7fc325e9e5056a52f63ebc84cc0c"
        },
        {
          "url": "https://git.kernel.org/stable/c/a443c55d96dede82a724df6e70a318ad15c199e1"
        },
        {
          "url": "https://git.kernel.org/stable/c/e8b2b392a646bf5cb9413c1cc7a39d99c1b65a62"
        },
        {
          "url": "https://git.kernel.org/stable/c/5c3568166129bc73fd6b37748d2d8f95cd8f22f3"
        },
        {
          "url": "https://git.kernel.org/stable/c/0a182f8d607464911756b4dbef5d6cad8de22469"
        }
      ],
      "title": "bpf, sockmap: fix race in sock_map_free()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50259",
    "datePublished": "2025-09-15T14:02:47.875Z",
    "dateReserved": "2025-09-15T13:58:00.974Z",
    "dateUpdated": "2025-09-15T14:02:47.875Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50259\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-15T14:15:36.750\",\"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\\nbpf, sockmap: fix race in sock_map_free()\\n\\nsock_map_free() calls release_sock(sk) without owning a reference\\non the socket. This can cause use-after-free as syzbot found [1]\\n\\nJakub Sitnicki already took care of a similar issue\\nin sock_hash_free() in commit 75e68e5bf2c7 (\\\"bpf, sockhash:\\nSynchronize delete from bucket list on map free\\\")\\n\\n[1]\\nrefcount_t: decrement hit 0; leaking memory.\\nWARNING: CPU: 0 PID: 3785 at lib/refcount.c:31 refcount_warn_saturate+0x17c/0x1a0 lib/refcount.c:31\\nModules linked in:\\nCPU: 0 PID: 3785 Comm: kworker/u4:6 Not tainted 6.1.0-rc7-syzkaller-00103-gef4d3ea40565 #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022\\nWorkqueue: events_unbound bpf_map_free_deferred\\nRIP: 0010:refcount_warn_saturate+0x17c/0x1a0 lib/refcount.c:31\\nCode: 68 8b 31 c0 e8 75 71 15 fd 0f 0b e9 64 ff ff ff e8 d9 6e 4e fd c6 05 62 9c 3d 0a 01 48 c7 c7 80 bb 68 8b 31 c0 e8 54 71 15 fd \u003c0f\u003e 0b e9 43 ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c a2 fe ff\\nRSP: 0018:ffffc9000456fb60 EFLAGS: 00010246\\nRAX: eae59bab72dcd700 RBX: 0000000000000004 RCX: ffff8880207057c0\\nRDX: 0000000000000000 RSI: 0000000000000201 RDI: 0000000000000000\\nRBP: 0000000000000004 R08: ffffffff816fdabd R09: fffff520008adee5\\nR10: fffff520008adee5 R11: 1ffff920008adee4 R12: 0000000000000004\\nR13: dffffc0000000000 R14: ffff88807b1c6c00 R15: 1ffff1100f638dcf\\nFS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000\\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: 0000001b30c30000 CR3: 000000000d08e000 CR4: 00000000003506f0\\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\\nCall Trace:\\n\u003cTASK\u003e\\n__refcount_dec include/linux/refcount.h:344 [inline]\\nrefcount_dec include/linux/refcount.h:359 [inline]\\n__sock_put include/net/sock.h:779 [inline]\\ntcp_release_cb+0x2d0/0x360 net/ipv4/tcp_output.c:1092\\nrelease_sock+0xaf/0x1c0 net/core/sock.c:3468\\nsock_map_free+0x219/0x2c0 net/core/sock_map.c:356\\nprocess_one_work+0x81c/0xd10 kernel/workqueue.c:2289\\nworker_thread+0xb14/0x1330 kernel/workqueue.c:2436\\nkthread+0x266/0x300 kernel/kthread.c:376\\nret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306\\n\u003c/TASK\u003e\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0a182f8d607464911756b4dbef5d6cad8de22469\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4cabc3af4a6f36c222fecb15858c1060e59218e7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5c3568166129bc73fd6b37748d2d8f95cd8f22f3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a443c55d96dede82a724df6e70a318ad15c199e1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/be719496ae6a7fc325e9e5056a52f63ebc84cc0c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e8b2b392a646bf5cb9413c1cc7a39d99c1b65a62\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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