Vulnerability-Lookup

FKIE_CVE-2025-21801

Vulnerability from fkie_nvd - Published: 2025-02-27 20:16 - Updated: 2026-10-21 13:17

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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: net: ravb: Fix missing rtnl lock in suspend/resume path Fix the suspend/resume path by ensuring the rtnl lock is held where required. Calls to ravb_open, ravb_close and wol operations must be performed under the rtnl lock to prevent conflicts with ongoing ndo operations. Without this fix, the following warning is triggered: [ 39.032969] ============================= [ 39.032983] WARNING: suspicious RCU usage [ 39.033019] ----------------------------- [ 39.033033] drivers/net/phy/phy_device.c:2004 suspicious rcu_dereference_protected() usage! ... [ 39.033597] stack backtrace: [ 39.033613] CPU: 0 UID: 0 PID: 174 Comm: python3 Not tainted 6.13.0-rc7-next-20250116-arm64-renesas-00002-g35245dfdc62c #7 [ 39.033623] Hardware name: Renesas SMARC EVK version 2 based on r9a08g045s33 (DT) [ 39.033628] Call trace: [ 39.033633] show_stack+0x14/0x1c (C) [ 39.033652] dump_stack_lvl+0xb4/0xc4 [ 39.033664] dump_stack+0x14/0x1c [ 39.033671] lockdep_rcu_suspicious+0x16c/0x22c [ 39.033682] phy_detach+0x160/0x190 [ 39.033694] phy_disconnect+0x40/0x54 [ 39.033703] ravb_close+0x6c/0x1cc [ 39.033714] ravb_suspend+0x48/0x120 [ 39.033721] dpm_run_callback+0x4c/0x14c [ 39.033731] device_suspend+0x11c/0x4dc [ 39.033740] dpm_suspend+0xdc/0x214 [ 39.033748] dpm_suspend_start+0x48/0x60 [ 39.033758] suspend_devices_and_enter+0x124/0x574 [ 39.033769] pm_suspend+0x1ac/0x274 [ 39.033778] state_store+0x88/0x124 [ 39.033788] kobj_attr_store+0x14/0x24 [ 39.033798] sysfs_kf_write+0x48/0x6c [ 39.033808] kernfs_fop_write_iter+0x118/0x1a8 [ 39.033817] vfs_write+0x27c/0x378 [ 39.033825] ksys_write+0x64/0xf4 [ 39.033833] __arm64_sys_write+0x18/0x20 [ 39.033841] invoke_syscall+0x44/0x104 [ 39.033852] el0_svc_common.constprop.0+0xb4/0xd4 [ 39.033862] do_el0_svc+0x18/0x20 [ 39.033870] el0_svc+0x3c/0xf0 [ 39.033880] el0t_64_sync_handler+0xc0/0xc4 [ 39.033888] el0t_64_sync+0x154/0x158 [ 39.041274] ravb 11c30000.ethernet eth0: Link is Down

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0296981941cf291edfbc318d3255a93439f368e4	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2c2ebb2b49573e5f8726112ad06b1dffc3c9ea03	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6105f0d9cc7be8669c2eed24b88b4655d5c35e8c
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ad19522c007bb24ed874468f8baa1503c4662cf4	Patch

Impacted products

	Vendor	Product	Version
	linux	linux_kernel	*
	linux	linux_kernel	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/renesas/ravb_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6105f0d9cc7be8669c2eed24b88b4655d5c35e8c",
              "status": "affected",
              "version": "0184165b2f42c4b032da9dd11546bfbaeb5afd4e",
              "versionType": "git"
            },
            {
              "lessThan": "0296981941cf291edfbc318d3255a93439f368e4",
              "status": "affected",
              "version": "0184165b2f42c4b032da9dd11546bfbaeb5afd4e",
              "versionType": "git"
            },
            {
              "lessThan": "ad19522c007bb24ed874468f8baa1503c4662cf4",
              "status": "affected",
              "version": "0184165b2f42c4b032da9dd11546bfbaeb5afd4e",
              "versionType": "git"
            },
            {
              "lessThan": "2c2ebb2b49573e5f8726112ad06b1dffc3c9ea03",
              "status": "affected",
              "version": "0184165b2f42c4b032da9dd11546bfbaeb5afd4e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/renesas/ravb_main.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": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.13.*",
              "status": "unaffected",
              "version": "6.13.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.14",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "1F3C05B7-5F93-443D-9334-0B93D74DDA67",
              "versionEndExcluding": "6.12.13",
              "versionStartIncluding": "4.9",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6D4116B1-1BFD-4F23-BA84-169CC05FC5A3",
              "versionEndExcluding": "6.13.2",
              "versionStartIncluding": "6.13",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ravb: Fix missing rtnl lock in suspend/resume path\n\nFix the suspend/resume path by ensuring the rtnl lock is held where\nrequired. Calls to ravb_open, ravb_close and wol operations must be\nperformed under the rtnl lock to prevent conflicts with ongoing ndo\noperations.\n\nWithout this fix, the following warning is triggered:\n[   39.032969] =============================\n[   39.032983] WARNING: suspicious RCU usage\n[   39.033019] -----------------------------\n[   39.033033] drivers/net/phy/phy_device.c:2004 suspicious\nrcu_dereference_protected() usage!\n...\n[   39.033597] stack backtrace:\n[   39.033613] CPU: 0 UID: 0 PID: 174 Comm: python3 Not tainted\n6.13.0-rc7-next-20250116-arm64-renesas-00002-g35245dfdc62c #7\n[   39.033623] Hardware name: Renesas SMARC EVK version 2 based on\nr9a08g045s33 (DT)\n[   39.033628] Call trace:\n[   39.033633]  show_stack+0x14/0x1c (C)\n[   39.033652]  dump_stack_lvl+0xb4/0xc4\n[   39.033664]  dump_stack+0x14/0x1c\n[   39.033671]  lockdep_rcu_suspicious+0x16c/0x22c\n[   39.033682]  phy_detach+0x160/0x190\n[   39.033694]  phy_disconnect+0x40/0x54\n[   39.033703]  ravb_close+0x6c/0x1cc\n[   39.033714]  ravb_suspend+0x48/0x120\n[   39.033721]  dpm_run_callback+0x4c/0x14c\n[   39.033731]  device_suspend+0x11c/0x4dc\n[   39.033740]  dpm_suspend+0xdc/0x214\n[   39.033748]  dpm_suspend_start+0x48/0x60\n[   39.033758]  suspend_devices_and_enter+0x124/0x574\n[   39.033769]  pm_suspend+0x1ac/0x274\n[   39.033778]  state_store+0x88/0x124\n[   39.033788]  kobj_attr_store+0x14/0x24\n[   39.033798]  sysfs_kf_write+0x48/0x6c\n[   39.033808]  kernfs_fop_write_iter+0x118/0x1a8\n[   39.033817]  vfs_write+0x27c/0x378\n[   39.033825]  ksys_write+0x64/0xf4\n[   39.033833]  __arm64_sys_write+0x18/0x20\n[   39.033841]  invoke_syscall+0x44/0x104\n[   39.033852]  el0_svc_common.constprop.0+0xb4/0xd4\n[   39.033862]  do_el0_svc+0x18/0x20\n[   39.033870]  el0_svc+0x3c/0xf0\n[   39.033880]  el0t_64_sync_handler+0xc0/0xc4\n[   39.033888]  el0t_64_sync+0x154/0x158\n[   39.041274] ravb 11c30000.ethernet eth0: Link is Down"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: ravb: Se corrige el bloqueo rtnl faltante en la ruta de suspensi\u00f3n/reanudaci\u00f3n Corrija la ruta de suspensi\u00f3n/reanudaci\u00f3n asegur\u00e1ndose de que el bloqueo rtnl se mantenga donde sea necesario. Las llamadas a las operaciones ravb_open, ravb_close y wol se deben realizar bajo el bloqueo rtnl para evitar conflictos con las operaciones ndo en curso. Sin esta correcci\u00f3n, se activa la siguiente advertencia: [ 39.032969] ============================= [ 39.032983] ADVERTENCIA: suspicious RCU usage [ 39.033019] ----------------------------- [ 39.033033] drivers/net/phy/phy_device.c:2004 suspicious rcu_dereference_protected() usage! ... [ 39.033597] stack backtrace: [ 39.033613] CPU: 0 UID: 0 PID: 174 Comm: python3 Not tainted 6.13.0-rc7-next-20250116-arm64-renesas-00002-g35245dfdc62c #7 [ 39.033623] Hardware name: Renesas SMARC EVK version 2 based on r9a08g045s33 (DT) [ 39.033628] Call trace: [ 39.033633] show_stack+0x14/0x1c (C) [ 39.033652] dump_stack_lvl+0xb4/0xc4 [ 39.033664] dump_stack+0x14/0x1c [ 39.033671] lockdep_rcu_suspicious+0x16c/0x22c [ 39.033682] phy_detach+0x160/0x190 [ 39.033694] phy_disconnect+0x40/0x54 [ 39.033703] ravb_close+0x6c/0x1cc [ 39.033714] ravb_suspend+0x48/0x120 [ 39.033721] dpm_run_callback+0x4c/0x14c [ 39.033731] device_suspend+0x11c/0x4dc [ 39.033740] dpm_suspend+0xdc/0x214 [ 39.033748] dpm_suspend_start+0x48/0x60 [ 39.033758] suspend_devices_and_enter+0x124/0x574 [ 39.033769] pm_suspend+0x1ac/0x274 [ 39.033778] state_store+0x88/0x124 [ 39.033788] kobj_attr_store+0x14/0x24 [ 39.033798] sysfs_kf_write+0x48/0x6c [ 39.033808] kernfs_fop_write_iter+0x118/0x1a8 [ 39.033817] vfs_write+0x27c/0x378 [ 39.033825] ksys_write+0x64/0xf4 [ 39.033833] __arm64_sys_write+0x18/0x20 [ 39.033841] invoke_syscall+0x44/0x104 [ 39.033852] el0_svc_common.constprop.0+0xb4/0xd4 [ 39.033862] do_el0_svc+0x18/0x20 [ 39.033870] el0_svc+0x3c/0xf0 [ 39.033880] el0t_64_sync_handler+0xc0/0xc4 [ 39.033888] el0t_64_sync+0x154/0x158 [ 39.041274] ravb 11c30000.ethernet eth0: Link is Down "
    }
  ],
  "id": "CVE-2025-21801",
  "lastModified": "2026-10-21T13:17:58.277",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "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"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-02-27T20:16:02.753",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/0296981941cf291edfbc318d3255a93439f368e4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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      "url": "https://git.kernel.org/stable/c/2c2ebb2b49573e5f8726112ad06b1dffc3c9ea03"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6105f0d9cc7be8669c2eed24b88b4655d5c35e8c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/ad19522c007bb24ed874468f8baa1503c4662cf4"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2025-21801 (GCVE-0-2025-21801)

Vulnerability from cvelistv5 – Published: 2025-02-27 20:00 – Updated: 2026-10-21 12:36

Title

net: ravb: Fix missing rtnl lock in suspend/resume path

Summary

Severity

7.8 (High)


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

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7067 records in the last 180 days details

References

4 references

URL	Tags
https://git.kernel.org/stable/c/6105f0d9cc7be8669…
https://git.kernel.org/stable/c/0296981941cf291ed…
https://git.kernel.org/stable/c/ad19522c007bb24ed…
https://git.kernel.org/stable/c/2c2ebb2b49573e5f8…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 0184165b2f42c4b032da9dd11546bfbaeb5afd4e , < 6105f0d9cc7be8669c2eed24b88b4655d5c35e8c (git) Affected: 0184165b2f42c4b032da9dd11546bfbaeb5afd4e , < 0296981941cf291edfbc318d3255a93439f368e4 (git) Affected: 0184165b2f42c4b032da9dd11546bfbaeb5afd4e , < ad19522c007bb24ed874468f8baa1503c4662cf4 (git) Affected: 0184165b2f42c4b032da9dd11546bfbaeb5afd4e , < 2c2ebb2b49573e5f8726112ad06b1dffc3c9ea03 (git)
Linux	Linux	Affected: 4.9 Unaffected: 0 , < 4.9 (semver) Unaffected: 6.6.160 , ≤ 6.6.* (semver) Unaffected: 6.12.13 , ≤ 6.12.* (semver) Unaffected: 6.13.2 , ≤ 6.13.* (semver) Unaffected: 6.14 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/renesas/ravb_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6105f0d9cc7be8669c2eed24b88b4655d5c35e8c",
              "status": "affected",
              "version": "0184165b2f42c4b032da9dd11546bfbaeb5afd4e",
              "versionType": "git"
            },
            {
              "lessThan": "0296981941cf291edfbc318d3255a93439f368e4",
              "status": "affected",
              "version": "0184165b2f42c4b032da9dd11546bfbaeb5afd4e",
              "versionType": "git"
            },
            {
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              "versionType": "git"
            },
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              "version": "0184165b2f42c4b032da9dd11546bfbaeb5afd4e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/renesas/ravb_main.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": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.13.*",
              "status": "unaffected",
              "version": "6.13.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.14",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.160",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.13",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.13.2",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.14",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ravb: Fix missing rtnl lock in suspend/resume path\n\nFix the suspend/resume path by ensuring the rtnl lock is held where\nrequired. Calls to ravb_open, ravb_close and wol operations must be\nperformed under the rtnl lock to prevent conflicts with ongoing ndo\noperations.\n\nWithout this fix, the following warning is triggered:\n[   39.032969] =============================\n[   39.032983] WARNING: suspicious RCU usage\n[   39.033019] -----------------------------\n[   39.033033] drivers/net/phy/phy_device.c:2004 suspicious\nrcu_dereference_protected() usage!\n...\n[   39.033597] stack backtrace:\n[   39.033613] CPU: 0 UID: 0 PID: 174 Comm: python3 Not tainted\n6.13.0-rc7-next-20250116-arm64-renesas-00002-g35245dfdc62c #7\n[   39.033623] Hardware name: Renesas SMARC EVK version 2 based on\nr9a08g045s33 (DT)\n[   39.033628] Call trace:\n[   39.033633]  show_stack+0x14/0x1c (C)\n[   39.033652]  dump_stack_lvl+0xb4/0xc4\n[   39.033664]  dump_stack+0x14/0x1c\n[   39.033671]  lockdep_rcu_suspicious+0x16c/0x22c\n[   39.033682]  phy_detach+0x160/0x190\n[   39.033694]  phy_disconnect+0x40/0x54\n[   39.033703]  ravb_close+0x6c/0x1cc\n[   39.033714]  ravb_suspend+0x48/0x120\n[   39.033721]  dpm_run_callback+0x4c/0x14c\n[   39.033731]  device_suspend+0x11c/0x4dc\n[   39.033740]  dpm_suspend+0xdc/0x214\n[   39.033748]  dpm_suspend_start+0x48/0x60\n[   39.033758]  suspend_devices_and_enter+0x124/0x574\n[   39.033769]  pm_suspend+0x1ac/0x274\n[   39.033778]  state_store+0x88/0x124\n[   39.033788]  kobj_attr_store+0x14/0x24\n[   39.033798]  sysfs_kf_write+0x48/0x6c\n[   39.033808]  kernfs_fop_write_iter+0x118/0x1a8\n[   39.033817]  vfs_write+0x27c/0x378\n[   39.033825]  ksys_write+0x64/0xf4\n[   39.033833]  __arm64_sys_write+0x18/0x20\n[   39.033841]  invoke_syscall+0x44/0x104\n[   39.033852]  el0_svc_common.constprop.0+0xb4/0xd4\n[   39.033862]  do_el0_svc+0x18/0x20\n[   39.033870]  el0_svc+0x3c/0xf0\n[   39.033880]  el0t_64_sync_handler+0xc0/0xc4\n[   39.033888]  el0t_64_sync+0x154/0x158\n[   39.041274] ravb 11c30000.ethernet eth0: Link is Down"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable code is a platform Ethernet driver\u0027s PM callback pair reached only through local activity \u2014 a suspend/resume transition plus a concurrent local rtnl-protected operation (ethtool ioctl, netlink, or an internally scheduled work item). No remote peer can reach or drive the unlocked window.\nAC:L - The attacker influences both sides: suspend/resume cycles are continuously and automatically driven on these Renesas embedded/automotive targets (and requestable by an unprivileged local session on general-purpose systems), while unprivileged ethtool/ioctl calls and interface traffic supply the concurrent rtnl-side operation, and the attempt can be repeated indefinitely until it lands.\nPR:L - An unprivileged local user suffices \u2014 `ETHTOOL_GSET`/`GLINKSETTINGS`/`GSTATS` are explicitly exempt from any capability check yet still run under `rtnl_lock()`, and generating the traffic that arms `ravb_tx_timeout_work()` needs only an ordinary socket; no root or `CAP_NET_ADMIN` is required.\nUI:N - System suspend/resume is triggered automatically by autosleep, idle timeouts, or RTC wakeups on the affected embedded and automotive platforms, so no victim action is needed for the window to open.\nS:U - The corruption is confined to kernel heap and DMA-coherent memory managed by the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The unlocked teardown frees the `phy_device` and the descriptor rings while concurrent rtnl holders still hold pointers to them, and use-after-free of these objects lets an attacker who reclaims the freed slabs read back kernel memory contents through the surviving accessors.\nI:H - Concurrent `ravb_ring_free()` from suspend and `ravb_tx_timeout_work()` double-frees DMA-coherent rings, page-pool objects, and kmalloc\u0027d arrays, and the DMAC can remain programmed to write into freed pages \u2014 heap corruption plus a device-driven write primitive suitable for control-flow hijacking.\nA:H - The race reliably produces kernel crashes \u2014 double `dma_free_coherent`/`page_pool_destroy`, use-after-free oopses on the detached PHY, and external aborts from MMIO access to an AVB block whose reset is asserted and clocks gated \u2014 taking down the system\u0027s primary network interface and the machine itself."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T12:36:00.320Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6105f0d9cc7be8669c2eed24b88b4655d5c35e8c"
        },
        {
          "url": "https://git.kernel.org/stable/c/0296981941cf291edfbc318d3255a93439f368e4"
        },
        {
          "url": "https://git.kernel.org/stable/c/ad19522c007bb24ed874468f8baa1503c4662cf4"
        },
        {
          "url": "https://git.kernel.org/stable/c/2c2ebb2b49573e5f8726112ad06b1dffc3c9ea03"
        }
      ],
      "title": "net: ravb: Fix missing rtnl lock in suspend/resume path",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21801",
    "datePublished": "2025-02-27T20:00:55.572Z",
    "dateReserved": "2024-12-29T08:45:45.770Z",
    "dateUpdated": "2026-10-21T12:36:00.320Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

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