Vulnerability-Lookup

FKIE_CVE-2022-49649

Vulnerability from fkie_nvd - Published: 2025-02-26 07:01 - Updated: 2026-06-17 05:18

Severity

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: xen/netback: avoid entering xenvif_rx_next_skb() with an empty rx queue xenvif_rx_next_skb() is expecting the rx queue not being empty, but in case the loop in xenvif_rx_action() is doing multiple iterations, the availability of another skb in the rx queue is not being checked. This can lead to crashes: [40072.537261] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080 [40072.537407] IP: xenvif_rx_skb+0x23/0x590 [xen_netback] [40072.537534] PGD 0 P4D 0 [40072.537644] Oops: 0000 [#1] SMP NOPTI [40072.537749] CPU: 0 PID: 12505 Comm: v1-c40247-q2-gu Not tainted 4.12.14-122.121-default #1 SLE12-SP5 [40072.537867] Hardware name: HP ProLiant DL580 Gen9/ProLiant DL580 Gen9, BIOS U17 11/23/2021 [40072.537999] task: ffff880433b38100 task.stack: ffffc90043d40000 [40072.538112] RIP: e030:xenvif_rx_skb+0x23/0x590 [xen_netback] [40072.538217] RSP: e02b:ffffc90043d43de0 EFLAGS: 00010246 [40072.538319] RAX: 0000000000000000 RBX: ffffc90043cd7cd0 RCX: 00000000000000f7 [40072.538430] RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffffc90043d43df8 [40072.538531] RBP: 000000000000003f R08: 000077ff80000000 R09: 0000000000000008 [40072.538644] R10: 0000000000007ff0 R11: 00000000000008f6 R12: ffffc90043ce2708 [40072.538745] R13: 0000000000000000 R14: ffffc90043d43ed0 R15: ffff88043ea748c0 [40072.538861] FS: 0000000000000000(0000) GS:ffff880484600000(0000) knlGS:0000000000000000 [40072.538988] CS: e033 DS: 0000 ES: 0000 CR0: 0000000080050033 [40072.539088] CR2: 0000000000000080 CR3: 0000000407ac8000 CR4: 0000000000040660 [40072.539211] Call Trace: [40072.539319] xenvif_rx_action+0x71/0x90 [xen_netback] [40072.539429] xenvif_kthread_guest_rx+0x14a/0x29c [xen_netback] Fix that by stopping the loop in case the rx queue becomes empty.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5a071aefd6414af5a20321ab58a0557b81993687	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7425479d20f9e96f7c3ec8e8a93fe0d7478724cb	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/94e8100678889ab428e68acadf042de723f094b9	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b99174ac57fe5d8867448c03b23828e63f24cb1c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b9c32a6886af79d6e0ad87a7b01800ed079cdd02	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c0fcceb5f3f1ec197c014fe218c2f28108cacd27	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d5320c6a27aa975aff740f9cb481dcbde48f4348	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f0b5c819b062df8bf5f2acf4697e3871cb3722da	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	5.19
linux	linux_kernel	5.19
linux	linux_kernel	5.19
linux	linux_kernel	5.19
linux	linux_kernel	5.19
linux	linux_kernel	5.19

JSON

To clipboard

{
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      "affectedData": [
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxen/netback: avoid entering xenvif_rx_next_skb() with an empty rx queue\n\nxenvif_rx_next_skb() is expecting the rx queue not being empty, but\nin case the loop in xenvif_rx_action() is doing multiple iterations,\nthe availability of another skb in the rx queue is not being checked.\n\nThis can lead to crashes:\n\n[40072.537261] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080\n[40072.537407] IP: xenvif_rx_skb+0x23/0x590 [xen_netback]\n[40072.537534] PGD 0 P4D 0\n[40072.537644] Oops: 0000 [#1] SMP NOPTI\n[40072.537749] CPU: 0 PID: 12505 Comm: v1-c40247-q2-gu Not tainted 4.12.14-122.121-default #1 SLE12-SP5\n[40072.537867] Hardware name: HP ProLiant DL580 Gen9/ProLiant DL580 Gen9, BIOS U17 11/23/2021\n[40072.537999] task: ffff880433b38100 task.stack: ffffc90043d40000\n[40072.538112] RIP: e030:xenvif_rx_skb+0x23/0x590 [xen_netback]\n[40072.538217] RSP: e02b:ffffc90043d43de0 EFLAGS: 00010246\n[40072.538319] RAX: 0000000000000000 RBX: ffffc90043cd7cd0 RCX: 00000000000000f7\n[40072.538430] RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffffc90043d43df8\n[40072.538531] RBP: 000000000000003f R08: 000077ff80000000 R09: 0000000000000008\n[40072.538644] R10: 0000000000007ff0 R11: 00000000000008f6 R12: ffffc90043ce2708\n[40072.538745] R13: 0000000000000000 R14: ffffc90043d43ed0 R15: ffff88043ea748c0\n[40072.538861] FS: 0000000000000000(0000) GS:ffff880484600000(0000) knlGS:0000000000000000\n[40072.538988] CS: e033 DS: 0000 ES: 0000 CR0: 0000000080050033\n[40072.539088] CR2: 0000000000000080 CR3: 0000000407ac8000 CR4: 0000000000040660\n[40072.539211] Call Trace:\n[40072.539319] xenvif_rx_action+0x71/0x90 [xen_netback]\n[40072.539429] xenvif_kthread_guest_rx+0x14a/0x29c [xen_netback]\n\nFix that by stopping the loop in case the rx queue becomes empty."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: xen/netback: evitar ingresar a xenvif_rx_next_skb() con una cola rx vac\u00eda xenvif_rx_next_skb() espera que la cola rx no est\u00e9 vac\u00eda, pero en caso de que el bucle en xenvif_rx_action() est\u00e9 realizando m\u00faltiples iteraciones, no se verifica la disponibilidad de otro skb en la cola rx. Esto puede provocar fallos: [40072.537261] ERROR: no se puede gestionar la desreferencia del puntero NULL del n\u00facleo en 0000000000000080 [40072.537407] IP: xenvif_rx_skb+0x23/0x590 [xen_netback] [40072.537534] PGD 0 P4D 0 [40072.537644] Oops: 0000 [#1] SMP NOPTI [40072.537749] CPU: 0 PID: 12505 Comm: v1-c40247-q2-gu Not tainted 4.12.14-122.121-default #1 SLE12-SP5 [40072.537867] Hardware name: HP ProLiant DL580 Gen9/ProLiant DL580 Gen9, BIOS U17 11/23/2021 [40072.537999] task: ffff880433b38100 task.stack: ffffc90043d40000 [40072.538112] RIP: e030:xenvif_rx_skb+0x23/0x590 [xen_netback] [40072.538217] RSP: e02b:ffffc90043d43de0 EFLAGS: 00010246 [40072.538319] RAX: 0000000000000000 RBX: ffffc90043cd7cd0 RCX: 00000000000000f7 [40072.538430] RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffffc90043d43df8 [40072.538531] RBP: 000000000000003f R08: 000077ff80000000 R09: 0000000000000008 [40072.538644] R10: 0000000000007ff0 R11: 00000000000008f6 R12: ffffc90043ce2708 [40072.538745] R13: 0000000000000000 R14: ffffc90043d43ed0 R15: ffff88043ea748c0 [40072.538861] FS: 0000000000000000(0000) GS:ffff880484600000(0000) knlGS:0000000000000000 [40072.538988] CS: e033 DS: 0000 ES: 0000 CR0: 0000000080050033 [40072.539088] CR2: 0000000000000080 CR3: 0000000407ac8000 CR4: 0000000000040660 [40072.539211] Call Trace: [40072.539319] xenvif_rx_action+0x71/0x90 [xen_netback] [40072.539429] xenvif_kthread_guest_rx+0x14a/0x29c [xen_netback] Solucione esto deteniendo el bucle en caso de que la cola de recepci\u00f3n se vac\u00ede."
    }
  ],
  "id": "CVE-2022-49649",
  "lastModified": "2026-06-17T05:18:44.933",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
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        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
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        "ssvcData": {
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          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-10-01T19:33:44.927179Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-02-26T07:01:40.050",
  "references": [
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
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          "value": "CWE-476"
        }
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      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}

CVE-2022-49649 (GCVE-0-2022-49649)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:23 – Updated: 2026-05-11 19:04

Title

xen/netback: avoid entering xenvif_rx_next_skb() with an empty rx queue

Summary

Severity

5.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-10-01 19:33 UTC

CWE

CWE-476 - NULL Pointer Dereference

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7033 records in the last 180 days details

References

8 references

URL	Tags
https://git.kernel.org/stable/c/c0fcceb5f3f1ec197…
https://git.kernel.org/stable/c/d5320c6a27aa975af…
https://git.kernel.org/stable/c/5a071aefd6414af5a…
https://git.kernel.org/stable/c/7425479d20f9e96f7…
https://git.kernel.org/stable/c/b9c32a6886af79d6e…
https://git.kernel.org/stable/c/b99174ac57fe5d886…
https://git.kernel.org/stable/c/f0b5c819b062df8bf…
https://git.kernel.org/stable/c/94e8100678889ab42…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 98f6d57ced73b723551568262019f1d6c8771f20 , < c0fcceb5f3f1ec197c014fe218c2f28108cacd27 (git) Affected: 98f6d57ced73b723551568262019f1d6c8771f20 , < d5320c6a27aa975aff740f9cb481dcbde48f4348 (git) Affected: 98f6d57ced73b723551568262019f1d6c8771f20 , < 5a071aefd6414af5a20321ab58a0557b81993687 (git) Affected: 98f6d57ced73b723551568262019f1d6c8771f20 , < 7425479d20f9e96f7c3ec8e8a93fe0d7478724cb (git) Affected: 98f6d57ced73b723551568262019f1d6c8771f20 , < b9c32a6886af79d6e0ad87a7b01800ed079cdd02 (git) Affected: 98f6d57ced73b723551568262019f1d6c8771f20 , < b99174ac57fe5d8867448c03b23828e63f24cb1c (git) Affected: 98f6d57ced73b723551568262019f1d6c8771f20 , < f0b5c819b062df8bf5f2acf4697e3871cb3722da (git) Affected: 98f6d57ced73b723551568262019f1d6c8771f20 , < 94e8100678889ab428e68acadf042de723f094b9 (git)
Linux	Linux	Affected: 4.9 Unaffected: 0 , < 4.9 (semver) Unaffected: 4.9.324 , ≤ 4.9.* (semver) Unaffected: 4.14.289 , ≤ 4.14.* (semver) Unaffected: 4.19.253 , ≤ 4.19.* (semver) Unaffected: 5.4.207 , ≤ 5.4.* (semver) Unaffected: 5.10.132 , ≤ 5.10.* (semver) Unaffected: 5.15.56 , ≤ 5.15.* (semver) Unaffected: 5.18.13 , ≤ 5.18.* (semver) Unaffected: 5.19 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2022-49649",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T19:33:44.927179Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-476",
                "description": "CWE-476 NULL Pointer Dereference",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-01T19:36:48.488Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/xen-netback/rx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c0fcceb5f3f1ec197c014fe218c2f28108cacd27",
              "status": "affected",
              "version": "98f6d57ced73b723551568262019f1d6c8771f20",
              "versionType": "git"
            },
            {
              "lessThan": "d5320c6a27aa975aff740f9cb481dcbde48f4348",
              "status": "affected",
              "version": "98f6d57ced73b723551568262019f1d6c8771f20",
              "versionType": "git"
            },
            {
              "lessThan": "5a071aefd6414af5a20321ab58a0557b81993687",
              "status": "affected",
              "version": "98f6d57ced73b723551568262019f1d6c8771f20",
              "versionType": "git"
            },
            {
              "lessThan": "7425479d20f9e96f7c3ec8e8a93fe0d7478724cb",
              "status": "affected",
              "version": "98f6d57ced73b723551568262019f1d6c8771f20",
              "versionType": "git"
            },
            {
              "lessThan": "b9c32a6886af79d6e0ad87a7b01800ed079cdd02",
              "status": "affected",
              "version": "98f6d57ced73b723551568262019f1d6c8771f20",
              "versionType": "git"
            },
            {
              "lessThan": "b99174ac57fe5d8867448c03b23828e63f24cb1c",
              "status": "affected",
              "version": "98f6d57ced73b723551568262019f1d6c8771f20",
              "versionType": "git"
            },
            {
              "lessThan": "f0b5c819b062df8bf5f2acf4697e3871cb3722da",
              "status": "affected",
              "version": "98f6d57ced73b723551568262019f1d6c8771f20",
              "versionType": "git"
            },
            {
              "lessThan": "94e8100678889ab428e68acadf042de723f094b9",
              "status": "affected",
              "version": "98f6d57ced73b723551568262019f1d6c8771f20",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/xen-netback/rx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.9"
            },
            {
              "lessThan": "4.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.324",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.289",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.253",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.207",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.132",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.56",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.18.*",
              "status": "unaffected",
              "version": "5.18.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.324",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.289",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.253",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.207",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.132",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.56",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.18.13",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxen/netback: avoid entering xenvif_rx_next_skb() with an empty rx queue\n\nxenvif_rx_next_skb() is expecting the rx queue not being empty, but\nin case the loop in xenvif_rx_action() is doing multiple iterations,\nthe availability of another skb in the rx queue is not being checked.\n\nThis can lead to crashes:\n\n[40072.537261] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080\n[40072.537407] IP: xenvif_rx_skb+0x23/0x590 [xen_netback]\n[40072.537534] PGD 0 P4D 0\n[40072.537644] Oops: 0000 [#1] SMP NOPTI\n[40072.537749] CPU: 0 PID: 12505 Comm: v1-c40247-q2-gu Not tainted 4.12.14-122.121-default #1 SLE12-SP5\n[40072.537867] Hardware name: HP ProLiant DL580 Gen9/ProLiant DL580 Gen9, BIOS U17 11/23/2021\n[40072.537999] task: ffff880433b38100 task.stack: ffffc90043d40000\n[40072.538112] RIP: e030:xenvif_rx_skb+0x23/0x590 [xen_netback]\n[40072.538217] RSP: e02b:ffffc90043d43de0 EFLAGS: 00010246\n[40072.538319] RAX: 0000000000000000 RBX: ffffc90043cd7cd0 RCX: 00000000000000f7\n[40072.538430] RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffffc90043d43df8\n[40072.538531] RBP: 000000000000003f R08: 000077ff80000000 R09: 0000000000000008\n[40072.538644] R10: 0000000000007ff0 R11: 00000000000008f6 R12: ffffc90043ce2708\n[40072.538745] R13: 0000000000000000 R14: ffffc90043d43ed0 R15: ffff88043ea748c0\n[40072.538861] FS: 0000000000000000(0000) GS:ffff880484600000(0000) knlGS:0000000000000000\n[40072.538988] CS: e033 DS: 0000 ES: 0000 CR0: 0000000080050033\n[40072.539088] CR2: 0000000000000080 CR3: 0000000407ac8000 CR4: 0000000000040660\n[40072.539211] Call Trace:\n[40072.539319] xenvif_rx_action+0x71/0x90 [xen_netback]\n[40072.539429] xenvif_kthread_guest_rx+0x14a/0x29c [xen_netback]\n\nFix that by stopping the loop in case the rx queue becomes empty."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:04:01.385Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c0fcceb5f3f1ec197c014fe218c2f28108cacd27"
        },
        {
          "url": "https://git.kernel.org/stable/c/d5320c6a27aa975aff740f9cb481dcbde48f4348"
        },
        {
          "url": "https://git.kernel.org/stable/c/5a071aefd6414af5a20321ab58a0557b81993687"
        },
        {
          "url": "https://git.kernel.org/stable/c/7425479d20f9e96f7c3ec8e8a93fe0d7478724cb"
        },
        {
          "url": "https://git.kernel.org/stable/c/b9c32a6886af79d6e0ad87a7b01800ed079cdd02"
        },
        {
          "url": "https://git.kernel.org/stable/c/b99174ac57fe5d8867448c03b23828e63f24cb1c"
        },
        {
          "url": "https://git.kernel.org/stable/c/f0b5c819b062df8bf5f2acf4697e3871cb3722da"
        },
        {
          "url": "https://git.kernel.org/stable/c/94e8100678889ab428e68acadf042de723f094b9"
        }
      ],
      "title": "xen/netback: avoid entering xenvif_rx_next_skb() with an empty rx queue",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49649",
    "datePublished": "2025-02-26T02:23:52.531Z",
    "dateReserved": "2025-02-26T02:21:30.433Z",
    "dateUpdated": "2026-05-11T19:04:01.385Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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