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wifi: libertas: fix use-after-free in lbs_free_adapter()

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: wifi: libertas: fix use-after-free in lbs_free_adapter() The lbs_free_adapter() function uses timer_delete() (non-synchronous) for both command_timer and tx_lockup_timer before the structure is freed. This is incorrect because timer_delete() does not wait for any running timer callback to complete. If a timer callback is executing when lbs_free_adapter() is called, the callback will access freed memory since lbs_cfg_free() frees the containing structure immediately after lbs_free_adapter() returns. Both timer callbacks (lbs_cmd_timeout_handler and lbs_tx_lockup_handler) access priv->driver_lock, priv->cur_cmd, priv->dev, and other fields, which would all be use-after-free violations. Use timer_delete_sync() instead to ensure any running timer callback has completed before returning. This bug was introduced in commit 8f641d93c38a ("libertas: detect TX lockups and reset hardware") where del_timer() was used instead of del_timer_sync() in the cleanup path. The command_timer has had the same issue since the driver was first written.

Announced Group revision 1
Original source ↗

CVE-2026-23281

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-23281

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "954ee164f4f4598afc172c0ec3865d0352e55a0b",
        "lessThan": "b15e0fa7adb4de3a03aee9e6fc4d83e5cf0a65e4",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "954ee164f4f4598afc172c0ec3865d0352e55a0b",
        "lessThan": "09f3c30ab3b1371eaf9676a1b8add57bca763083",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "954ee164f4f4598afc172c0ec3865d0352e55a0b",
        "lessThan": "3f9dec4a6d95d7f1f5e9e9dfdfa173c053bba8dc",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "954ee164f4f4598afc172c0ec3865d0352e55a0b",
        "lessThan": "3c5c818c78b03a1725f3dcd566865c77b48dd3a6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "954ee164f4f4598afc172c0ec3865d0352e55a0b",
        "lessThan": "d0155fe68f31b339961cf2d4f92937d57e9384e6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "954ee164f4f4598afc172c0ec3865d0352e55a0b",
        "lessThan": "ed7d30f90b77f73a47498686ede83f622b7e4f0d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "954ee164f4f4598afc172c0ec3865d0352e55a0b",
        "lessThan": "a9f55b14486426d907459bced5825a25063bd922",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "954ee164f4f4598afc172c0ec3865d0352e55a0b",
        "lessThan": "03cc8f90d0537fcd4985c3319b4fafbf2e3fb1f0",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/net/wireless/marvell/libertas/main.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.24"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.24",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.253",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.203",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.167",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.130",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.78",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.17",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "6.19.7",
        "versionType": "semver",
        "lessThanOrEqual": "6.19.*"
      },
      {
        "status": "unaffected",
        "version": "7.0",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/net/wireless/marvell/libertas/main.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-23281

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#27209 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. CVE-2026-23281 · Revision 1Source updated