Vulnerability-Lookup

FKIE_CVE-2022-49017

Vulnerability from fkie_nvd - Published: 2024-10-21 20:15 - Updated: 2026-08-04 10:17

Severity

8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: tipc: re-fetch skb cb after tipc_msg_validate As the call trace shows, the original skb was freed in tipc_msg_validate(), and dereferencing the old skb cb would cause an use-after-free crash. BUG: KASAN: use-after-free in tipc_crypto_rcv_complete+0x1835/0x2240 [tipc] Call Trace: <IRQ> tipc_crypto_rcv_complete+0x1835/0x2240 [tipc] tipc_crypto_rcv+0xd32/0x1ec0 [tipc] tipc_rcv+0x744/0x1150 [tipc] ... Allocated by task 47078: kmem_cache_alloc_node+0x158/0x4d0 __alloc_skb+0x1c1/0x270 tipc_buf_acquire+0x1e/0xe0 [tipc] tipc_msg_create+0x33/0x1c0 [tipc] tipc_link_build_proto_msg+0x38a/0x2100 [tipc] tipc_link_timeout+0x8b8/0xef0 [tipc] tipc_node_timeout+0x2a1/0x960 [tipc] call_timer_fn+0x2d/0x1c0 ... Freed by task 47078: tipc_msg_validate+0x7b/0x440 [tipc] tipc_crypto_rcv_complete+0x4b5/0x2240 [tipc] tipc_crypto_rcv+0xd32/0x1ec0 [tipc] tipc_rcv+0x744/0x1150 [tipc] This patch fixes it by re-fetching the skb cb from the new allocated skb after calling tipc_msg_validate().

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1daec0815655e110c6f206c5e777a4af8168ff58	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3067bc61fcfe3081bf4807ce65560f499e895e77	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a1ba595e35aa3afbe417ff0af353afb9f65559c0	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e128190adb2edfd5042105b5d1ed4553f295f5ef	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.1
linux	linux_kernel	6.1
linux	linux_kernel	6.1
linux	linux_kernel	6.1
linux	linux_kernel	6.1
linux	linux_kernel	6.1
linux	linux_kernel	6.1

JSON

To clipboard

{
  "affected": [
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      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/tipc/crypto.c"
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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: re-fetch skb cb after tipc_msg_validate\n\nAs the call trace shows, the original skb was freed in tipc_msg_validate(),\nand dereferencing the old skb cb would cause an use-after-free crash.\n\n  BUG: KASAN: use-after-free in tipc_crypto_rcv_complete+0x1835/0x2240 [tipc]\n  Call Trace:\n   \u003cIRQ\u003e\n   tipc_crypto_rcv_complete+0x1835/0x2240 [tipc]\n   tipc_crypto_rcv+0xd32/0x1ec0 [tipc]\n   tipc_rcv+0x744/0x1150 [tipc]\n  ...\n  Allocated by task 47078:\n   kmem_cache_alloc_node+0x158/0x4d0\n   __alloc_skb+0x1c1/0x270\n   tipc_buf_acquire+0x1e/0xe0 [tipc]\n   tipc_msg_create+0x33/0x1c0 [tipc]\n   tipc_link_build_proto_msg+0x38a/0x2100 [tipc]\n   tipc_link_timeout+0x8b8/0xef0 [tipc]\n   tipc_node_timeout+0x2a1/0x960 [tipc]\n   call_timer_fn+0x2d/0x1c0\n  ...\n  Freed by task 47078:\n   tipc_msg_validate+0x7b/0x440 [tipc]\n   tipc_crypto_rcv_complete+0x4b5/0x2240 [tipc]\n   tipc_crypto_rcv+0xd32/0x1ec0 [tipc]\n   tipc_rcv+0x744/0x1150 [tipc]\n\nThis patch fixes it by re-fetching the skb cb from the new allocated skb\nafter calling tipc_msg_validate()."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tipc: volver a obtener el skb cb despu\u00e9s de tipc_msg_validate Como muestra el seguimiento de la llamada, el skb original se liber\u00f3 en tipc_msg_validate(), y desreferenciar el antiguo skb cb causar\u00eda un bloqueo por use after free. ERROR: KASAN: use after free en tipc_crypto_rcv_complete+0x1835/0x2240 [tipc] Seguimiento de llamadas:  tipc_crypto_rcv_complete+0x1835/0x2240 [tipc] tipc_crypto_rcv+0xd32/0x1ec0 [tipc] tipc_rcv+0x744/0x1150 [tipc] ... Asignado por la tarea 47078: kmem_cache_alloc_node+0x158/0x4d0 __alloc_skb+0x1c1/0x270 tipc_buf_acquire+0x1e/0xe0 [tipc] tipc_msg_create+0x33/0x1c0 [tipc] tipc_link_build_proto_msg+0x38a/0x2100 [tipc] tipc_link_timeout+0x8b8/0xef0 [tipc] tipc_node_timeout+0x2a1/0x960 [tipc] call_timer_fn+0x2d/0x1c0 ... Liberado por la tarea 47078: tipc_msg_validate+0x7b/0x440 [tipc] tipc_crypto_rcv_complete+0x4b5/0x2240 [tipc] tipc_crypto_rcv+0xd32/0x1ec0 [tipc] tipc_rcv+0x744/0x1150 [tipc] Este parche lo corrige volviendo a obtener el cb skb del nuevo skb asignado despu\u00e9s de llamar a tipc_msg_validate()."
    }
  ],
  "id": "CVE-2022-49017",
  "lastModified": "2026-08-04T10:17:31.180",
  "metrics": {
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          "attackComplexity": "LOW",
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}

CVE-2022-49017 (GCVE-0-2022-49017)

Vulnerability from cvelistv5 – Published: 2024-10-21 20:06 – Updated: 2026-08-05 08:53

Title

tipc: re-fetch skb cb after tipc_msg_validate

Summary

Severity

8.8 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-10-22 13:13 UTC

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/a1ba595e35aa3afbe…
https://git.kernel.org/stable/c/1daec0815655e110c…
https://git.kernel.org/stable/c/e128190adb2edfd50…
https://git.kernel.org/stable/c/3067bc61fcfe3081b…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: fc1b6d6de2208774efd2a20bf0daddb02d18b1e0 , < a1ba595e35aa3afbe417ff0af353afb9f65559c0 (git) Affected: fc1b6d6de2208774efd2a20bf0daddb02d18b1e0 , < 1daec0815655e110c6f206c5e777a4af8168ff58 (git) Affected: fc1b6d6de2208774efd2a20bf0daddb02d18b1e0 , < e128190adb2edfd5042105b5d1ed4553f295f5ef (git) Affected: fc1b6d6de2208774efd2a20bf0daddb02d18b1e0 , < 3067bc61fcfe3081bf4807ce65560f499e895e77 (git)
Linux	Linux	Affected: 5.5 Unaffected: 0 , < 5.5 (semver) Unaffected: 5.10.158 , ≤ 5.10.* (semver) Unaffected: 5.15.82 , ≤ 5.15.* (semver) Unaffected: 6.0.12 , ≤ 6.0.* (semver) Unaffected: 6.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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                "id": "CVE-2022-49017",
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                  },
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: re-fetch skb cb after tipc_msg_validate\n\nAs the call trace shows, the original skb was freed in tipc_msg_validate(),\nand dereferencing the old skb cb would cause an use-after-free crash.\n\n  BUG: KASAN: use-after-free in tipc_crypto_rcv_complete+0x1835/0x2240 [tipc]\n  Call Trace:\n   \u003cIRQ\u003e\n   tipc_crypto_rcv_complete+0x1835/0x2240 [tipc]\n   tipc_crypto_rcv+0xd32/0x1ec0 [tipc]\n   tipc_rcv+0x744/0x1150 [tipc]\n  ...\n  Allocated by task 47078:\n   kmem_cache_alloc_node+0x158/0x4d0\n   __alloc_skb+0x1c1/0x270\n   tipc_buf_acquire+0x1e/0xe0 [tipc]\n   tipc_msg_create+0x33/0x1c0 [tipc]\n   tipc_link_build_proto_msg+0x38a/0x2100 [tipc]\n   tipc_link_timeout+0x8b8/0xef0 [tipc]\n   tipc_node_timeout+0x2a1/0x960 [tipc]\n   call_timer_fn+0x2d/0x1c0\n  ...\n  Freed by task 47078:\n   tipc_msg_validate+0x7b/0x440 [tipc]\n   tipc_crypto_rcv_complete+0x4b5/0x2240 [tipc]\n   tipc_crypto_rcv+0xd32/0x1ec0 [tipc]\n   tipc_rcv+0x744/0x1150 [tipc]\n\nThis patch fixes it by re-fetching the skb cb from the new allocated skb\nafter calling tipc_msg_validate()."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The vulnerable path is tipc_udp_recv/tipc_l2_rcv_msg \u2192 tipc_rcv \u2192 tipc_crypto_rcv \u2192 tipc_crypto_rcv_complete, reached by processing encrypted TIPC packets from a remote peer over UDP or Ethernet bearers.\nAC:L - A peer who can send valid encrypted TIPC messages reliably drives the decrypt-complete path; the tipc_msg_validate skb replacement triggers on common high-truesize RX buffers (e.g. page-backed skbs), with no race beyond attacker control.\nPR:L - Successful AEAD decryption is required before tipc_msg_validate and the UAF write, so the attacker must possess the cluster/node TIPC encryption key as an authenticated peer, but needs no elevated OS privileges on the victim.\nUI:N - Exploitation is fully driven by attacker-sent encrypted packets; no victim user action is required once a TIPC bearer with crypto is configured and running.\nS:U - This is standard in-kernel memory corruption within the host TIPC stack and does not cross a VM, IOMMU, or other security authority boundary.\nC:H - Use-after-free of the skb control block enables heap reuse and attacker-controlled object contents, which can be leveraged for arbitrary kernel memory disclosure.\nI:H - The bug writes to freed skb-\u003ecb (decrypted flag and possibly tx_clone_ctx memset), giving a UAF write primitive exploitable for corruption and control-flow hijacking.\nA:H - The KASAN report shows a use-after-free crash in IRQ context; the UAF can cause kernel oops/panic and denial of service even when not fully exploited for code execution."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:53:28.139Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a1ba595e35aa3afbe417ff0af353afb9f65559c0"
        },
        {
          "url": "https://git.kernel.org/stable/c/1daec0815655e110c6f206c5e777a4af8168ff58"
        },
        {
          "url": "https://git.kernel.org/stable/c/e128190adb2edfd5042105b5d1ed4553f295f5ef"
        },
        {
          "url": "https://git.kernel.org/stable/c/3067bc61fcfe3081bf4807ce65560f499e895e77"
        }
      ],
      "title": "tipc: re-fetch skb cb after tipc_msg_validate",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49017",
    "datePublished": "2024-10-21T20:06:25.971Z",
    "dateReserved": "2024-08-22T01:27:53.646Z",
    "dateUpdated": "2026-08-05T08:53:28.139Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

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FKIE_CVE-2022-49017

CVE-2022-49017 (GCVE-0-2022-49017)

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