Vulnerability-Lookup

GHSA-RGR3-H3CV-574X

Vulnerability from github – Published: 2026-03-25 12:30 – Updated: 2026-03-25 12:30

Details

In the Linux kernel, the following vulnerability has been resolved:

wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()

There is a use-after-free error in cfg80211_shutdown_all_interfaces found by syzkaller:

BUG: KASAN: use-after-free in cfg80211_shutdown_all_interfaces+0x213/0x220 Read of size 8 at addr ffff888112a78d98 by task kworker/0:5/5326 CPU: 0 UID: 0 PID: 5326 Comm: kworker/0:5 Not tainted 6.19.0-rc2 #2 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Workqueue: events cfg80211_rfkill_block_work Call Trace: dump_stack_lvl+0x116/0x1f0 print_report+0xcd/0x630 kasan_report+0xe0/0x110 cfg80211_shutdown_all_interfaces+0x213/0x220 cfg80211_rfkill_block_work+0x1e/0x30 process_one_work+0x9cf/0x1b70 worker_thread+0x6c8/0xf10 kthread+0x3c5/0x780 ret_from_fork+0x56d/0x700 ret_from_fork_asm+0x1a/0x30

The problem arises due to the rfkill_block work is not cancelled when wiphy is being unregistered. In order to fix the issue cancel the corresponding work in wiphy_unregister().

Found by Linux Verification Center (linuxtesting.org) with Syzkaller.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-23336"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-25T11:16:31Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: cancel rfkill_block work in wiphy_unregister()\n\nThere is a use-after-free error in cfg80211_shutdown_all_interfaces found\nby syzkaller:\n\nBUG: KASAN: use-after-free in cfg80211_shutdown_all_interfaces+0x213/0x220\nRead of size 8 at addr ffff888112a78d98 by task kworker/0:5/5326\nCPU: 0 UID: 0 PID: 5326 Comm: kworker/0:5 Not tainted 6.19.0-rc2 #2 PREEMPT(voluntary)\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\nWorkqueue: events cfg80211_rfkill_block_work\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x116/0x1f0\n print_report+0xcd/0x630\n kasan_report+0xe0/0x110\n cfg80211_shutdown_all_interfaces+0x213/0x220\n cfg80211_rfkill_block_work+0x1e/0x30\n process_one_work+0x9cf/0x1b70\n worker_thread+0x6c8/0xf10\n kthread+0x3c5/0x780\n ret_from_fork+0x56d/0x700\n ret_from_fork_asm+0x1a/0x30\n \u003c/TASK\u003e\n\nThe problem arises due to the rfkill_block work is not cancelled when wiphy\nis being unregistered. In order to fix the issue cancel the corresponding\nwork in wiphy_unregister().\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller.",
  "id": "GHSA-rgr3-h3cv-574x",
  "modified": "2026-03-25T12:30:23Z",
  "published": "2026-03-25T12:30:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23336"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/57e39fe8da573435fa35975f414f4dc17d9f8449"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/584279ad9ff1e8e7c5494b9fce286201f7d1f9e2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/767d23ade706d5fa51c36168e92a9c5533c351a1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cd2f52944c7b95dcdfe0d87f385a2d96458a3ae5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eeea8da43ab86ac0a6b9cec225eec91564346940"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fa18639deab4a3662d543200c5bfc29bf4e23173"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-23336 (GCVE-0-2026-23336)

Vulnerability from cvelistv5 – Published: 2026-03-25 10:27 – Updated: 2026-03-25 10:27

Title

wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: cancel rfkill_block work in wiphy_unregister() There is a use-after-free error in cfg80211_shutdown_all_interfaces found by syzkaller: BUG: KASAN: use-after-free in cfg80211_shutdown_all_interfaces+0x213/0x220 Read of size 8 at addr ffff888112a78d98 by task kworker/0:5/5326 CPU: 0 UID: 0 PID: 5326 Comm: kworker/0:5 Not tainted 6.19.0-rc2 #2 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Workqueue: events cfg80211_rfkill_block_work Call Trace: <TASK> dump_stack_lvl+0x116/0x1f0 print_report+0xcd/0x630 kasan_report+0xe0/0x110 cfg80211_shutdown_all_interfaces+0x213/0x220 cfg80211_rfkill_block_work+0x1e/0x30 process_one_work+0x9cf/0x1b70 worker_thread+0x6c8/0xf10 kthread+0x3c5/0x780 ret_from_fork+0x56d/0x700 ret_from_fork_asm+0x1a/0x30 </TASK> The problem arises due to the rfkill_block work is not cancelled when wiphy is being unregistered. In order to fix the issue cancel the corresponding work in wiphy_unregister(). Found by Linux Verification Center (linuxtesting.org) with Syzkaller.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/eeea8da43ab86ac0a…
	https://git.kernel.org/stable/c/fa18639deab4a3662…
	https://git.kernel.org/stable/c/57e39fe8da573435f…
	https://git.kernel.org/stable/c/584279ad9ff1e8e7c…
	https://git.kernel.org/stable/c/cd2f52944c7b95dcd…
	https://git.kernel.org/stable/c/767d23ade706d5fa5…

Impacted products

Vendor

Product

Version

Linux

Affected: 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 , < eeea8da43ab86ac0a6b9cec225eec91564346940 (git)
Affected: 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 , < fa18639deab4a3662d543200c5bfc29bf4e23173 (git)
Affected: 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 , < 57e39fe8da573435fa35975f414f4dc17d9f8449 (git)
Affected: 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 , < 584279ad9ff1e8e7c5494b9fce286201f7d1f9e2 (git)
Affected: 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 , < cd2f52944c7b95dcdfe0d87f385a2d96458a3ae5 (git)
Affected: 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 , < 767d23ade706d5fa51c36168e92a9c5533c351a1 (git)

Linux

Affected: 2.6.31
Unaffected: 0 , < 2.6.31 (semver)
Unaffected: 6.1.167 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.77 , ≤ 6.12.* (semver)
Unaffected: 6.18.17 , ≤ 6.18.* (semver)
Unaffected: 6.19.7 , ≤ 6.19.* (semver)
Unaffected: 7.0-rc2 , ≤ * (original_commit_for_fix)

Show details on NVD website

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/wireless/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "eeea8da43ab86ac0a6b9cec225eec91564346940",
              "status": "affected",
              "version": "1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3",
              "versionType": "git"
            },
            {
              "lessThan": "fa18639deab4a3662d543200c5bfc29bf4e23173",
              "status": "affected",
              "version": "1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3",
              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "584279ad9ff1e8e7c5494b9fce286201f7d1f9e2",
              "status": "affected",
              "version": "1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3",
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            },
            {
              "lessThan": "cd2f52944c7b95dcdfe0d87f385a2d96458a3ae5",
              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "767d23ade706d5fa51c36168e92a9c5533c351a1",
              "status": "affected",
              "version": "1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/wireless/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.31"
            },
            {
              "lessThan": "2.6.31",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.167",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.130",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.77",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.17",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0-rc2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.167",
                  "versionStartIncluding": "2.6.31",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.130",
                  "versionStartIncluding": "2.6.31",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.77",
                  "versionStartIncluding": "2.6.31",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.17",
                  "versionStartIncluding": "2.6.31",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.7",
                  "versionStartIncluding": "2.6.31",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0-rc2",
                  "versionStartIncluding": "2.6.31",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: cancel rfkill_block work in wiphy_unregister()\n\nThere is a use-after-free error in cfg80211_shutdown_all_interfaces found\nby syzkaller:\n\nBUG: KASAN: use-after-free in cfg80211_shutdown_all_interfaces+0x213/0x220\nRead of size 8 at addr ffff888112a78d98 by task kworker/0:5/5326\nCPU: 0 UID: 0 PID: 5326 Comm: kworker/0:5 Not tainted 6.19.0-rc2 #2 PREEMPT(voluntary)\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\nWorkqueue: events cfg80211_rfkill_block_work\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x116/0x1f0\n print_report+0xcd/0x630\n kasan_report+0xe0/0x110\n cfg80211_shutdown_all_interfaces+0x213/0x220\n cfg80211_rfkill_block_work+0x1e/0x30\n process_one_work+0x9cf/0x1b70\n worker_thread+0x6c8/0xf10\n kthread+0x3c5/0x780\n ret_from_fork+0x56d/0x700\n ret_from_fork_asm+0x1a/0x30\n \u003c/TASK\u003e\n\nThe problem arises due to the rfkill_block work is not cancelled when wiphy\nis being unregistered. In order to fix the issue cancel the corresponding\nwork in wiphy_unregister().\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-25T10:27:26.061Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/eeea8da43ab86ac0a6b9cec225eec91564346940"
        },
        {
          "url": "https://git.kernel.org/stable/c/fa18639deab4a3662d543200c5bfc29bf4e23173"
        },
        {
          "url": "https://git.kernel.org/stable/c/57e39fe8da573435fa35975f414f4dc17d9f8449"
        },
        {
          "url": "https://git.kernel.org/stable/c/584279ad9ff1e8e7c5494b9fce286201f7d1f9e2"
        },
        {
          "url": "https://git.kernel.org/stable/c/cd2f52944c7b95dcdfe0d87f385a2d96458a3ae5"
        },
        {
          "url": "https://git.kernel.org/stable/c/767d23ade706d5fa51c36168e92a9c5533c351a1"
        }
      ],
      "title": "wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23336",
    "datePublished": "2026-03-25T10:27:26.061Z",
    "dateReserved": "2026-01-13T15:37:45.997Z",
    "dateUpdated": "2026-03-25T10:27:26.061Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-RGR3-H3CV-574X

CVE-2026-23336 (GCVE-0-2026-23336)

Tags

Sightings

Nomenclature