github - ghsa-xpwf-pw24-jcwf

GHSA-XPWF-PW24-JCWF

Vulnerability from github – Published: 2025-03-17 21:30 – Updated: 2025-11-03 21:32

Details

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

drivers: staging: rtl8723bs: Fix deadlock in rtw_surveydone_event_callback()

There is a deadlock in rtw_surveydone_event_callback(), which is shown below:

We hold pmlmepriv->lock in position (1) of thread 1 and use del_timer_sync() to wait timer to stop, but timer handler also need pmlmepriv->lock in position (2) of thread 2. As a result, rtw_surveydone_event_callback() will block forever.

This patch extracts del_timer_sync() from the protection of spin_lock_bh(), which could let timer handler to obtain the needed lock. What`s more, we change spin_lock_bh() in rtw_scan_timeout_handler() to spin_lock_irq(). Otherwise, spin_lock_bh() will also cause deadlock() in timer handler.

Severity ?

5.5 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49309"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-667"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T07:01:07Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers: staging: rtl8723bs: Fix deadlock in rtw_surveydone_event_callback()\n\nThere is a deadlock in rtw_surveydone_event_callback(),\nwhich is shown below:\n\n   (Thread 1)                  |      (Thread 2)\n                               | _set_timer()\nrtw_surveydone_event_callback()|  mod_timer()\n spin_lock_bh() //(1)          |  (wait a time)\n ...                           | rtw_scan_timeout_handler()\n del_timer_sync()              |  spin_lock_bh() //(2)\n (wait timer to stop)          |  ...\n\nWe hold pmlmepriv-\u003elock in position (1) of thread 1 and use\ndel_timer_sync() to wait timer to stop, but timer handler\nalso need pmlmepriv-\u003elock in position (2) of thread 2.\nAs a result, rtw_surveydone_event_callback() will block forever.\n\nThis patch extracts del_timer_sync() from the protection of\nspin_lock_bh(), which could let timer handler to obtain\nthe needed lock. What`s more, we change spin_lock_bh() in\nrtw_scan_timeout_handler() to spin_lock_irq(). Otherwise,\nspin_lock_bh() will also cause deadlock() in timer handler.",
  "id": "GHSA-xpwf-pw24-jcwf",
  "modified": "2025-11-03T21:32:52Z",
  "published": "2025-03-17T21:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49309"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2c41f5c341853f84b7bc2f32605d4e2782e8c279"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c84e5c819600ee0628f61b33d145258ae0f3d7a7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cc7ad0d77b51c872d629bcd98aea463a3c4109e7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ce129d3efd181da5fd56f4360cc8827122afa67e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f89f6c3ebf69623b8ea48200bd690e9e210335a1"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2022-49309 (GCVE-0-2022-49309)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:10 – Updated: 2025-11-03 19:27

Summary

In the Linux kernel, the following vulnerability has been resolved: drivers: staging: rtl8723bs: Fix deadlock in rtw_surveydone_event_callback() There is a deadlock in rtw_surveydone_event_callback(), which is shown below: (Thread 1) | (Thread 2) | _set_timer() rtw_surveydone_event_callback()| mod_timer() spin_lock_bh() //(1) | (wait a time) ... | rtw_scan_timeout_handler() del_timer_sync() | spin_lock_bh() //(2) (wait timer to stop) | ... We hold pmlmepriv->lock in position (1) of thread 1 and use del_timer_sync() to wait timer to stop, but timer handler also need pmlmepriv->lock in position (2) of thread 2. As a result, rtw_surveydone_event_callback() will block forever. This patch extracts del_timer_sync() from the protection of spin_lock_bh(), which could let timer handler to obtain the needed lock. What`s more, we change spin_lock_bh() in rtw_scan_timeout_handler() to spin_lock_irq(). Otherwise, spin_lock_bh() will also cause deadlock() in timer handler.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/c84e5c819600ee062…
	https://git.kernel.org/stable/c/f89f6c3ebf69623b8…
	https://git.kernel.org/stable/c/ce129d3efd181da5f…
	https://git.kernel.org/stable/c/2c41f5c341853f84b…
	https://git.kernel.org/stable/c/cc7ad0d77b51c872d…

Impacted products

Vendor

Product

Version

Linux

Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < c84e5c819600ee0628f61b33d145258ae0f3d7a7 (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < f89f6c3ebf69623b8ea48200bd690e9e210335a1 (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < ce129d3efd181da5fd56f4360cc8827122afa67e (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 2c41f5c341853f84b7bc2f32605d4e2782e8c279 (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < cc7ad0d77b51c872d629bcd98aea463a3c4109e7 (git)

Linux

Affected: 4.12
Unaffected: 0 , < 4.12 (semver)
Unaffected: 5.10.237 , ≤ 5.10.* (semver)
Unaffected: 5.15.47 , ≤ 5.15.* (semver)
Unaffected: 5.17.15 , ≤ 5.17.* (semver)
Unaffected: 5.18.4 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)

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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-XPWF-PW24-JCWF

CVE-2022-49309 (GCVE-0-2022-49309)

Tags

Sightings

Nomenclature