CVE-2026-23281
published 2026-03-25CVE-2026-23281: 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…
PriorityP341high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.13%
2.6th percentile
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.
Affected
25 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.19.8-1 (forky) | linux 6.19.8-1 (forky) |
| linux | linux | — | — |
| linux | linux | >= 954ee164f4f4598afc172c0ec3865d0352e55a0b < b15e0fa7adb4de3a03aee9e6fc4d83e5cf0a65e4 | b15e0fa7adb4de3a03aee9e6fc4d83e5cf0a65e4 |
| linux | linux | >= 954ee164f4f4598afc172c0ec3865d0352e55a0b < 09f3c30ab3b1371eaf9676a1b8add57bca763083 | 09f3c30ab3b1371eaf9676a1b8add57bca763083 |
| linux | linux | >= 954ee164f4f4598afc172c0ec3865d0352e55a0b < 3f9dec4a6d95d7f1f5e9e9dfdfa173c053bba8dc | 3f9dec4a6d95d7f1f5e9e9dfdfa173c053bba8dc |
| linux | linux | >= 954ee164f4f4598afc172c0ec3865d0352e55a0b < 3c5c818c78b03a1725f3dcd566865c77b48dd3a6 | 3c5c818c78b03a1725f3dcd566865c77b48dd3a6 |
| linux | linux | >= 954ee164f4f4598afc172c0ec3865d0352e55a0b < d0155fe68f31b339961cf2d4f92937d57e9384e6 | d0155fe68f31b339961cf2d4f92937d57e9384e6 |
| linux | linux | >= 954ee164f4f4598afc172c0ec3865d0352e55a0b < ed7d30f90b77f73a47498686ede83f622b7e4f0d | ed7d30f90b77f73a47498686ede83f622b7e4f0d |
| linux | linux | >= 954ee164f4f4598afc172c0ec3865d0352e55a0b < a9f55b14486426d907459bced5825a25063bd922 | a9f55b14486426d907459bced5825a25063bd922 |
| linux | linux | >= 954ee164f4f4598afc172c0ec3865d0352e55a0b < 03cc8f90d0537fcd4985c3319b4fafbf2e3fb1f0 | 03cc8f90d0537fcd4985c3319b4fafbf2e3fb1f0 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 6.19.8-1 | 6.19.8-1 |
| linux | linux_kernel | >= 2.6.24 < 6.1.167 | 6.1.167 |
| linux | linux_kernel | >= 2.6.24 < 5.10.253 | 5.10.253 |
| linux | linux_kernel | >= 5.11 < 5.15.203 | 5.15.203 |
| linux | linux_kernel | >= 5.16 < 6.1.167 | 6.1.167 |
| linux | linux_kernel | >= 6.13 < 6.18.17 | 6.18.17 |
| linux | linux_kernel | >= 6.13.0 < 6.18.17 | 6.18.17 |
| linux | linux_kernel | >= 6.19 < 6.19.7 | 6.19.7 |
| linux | linux_kernel | >= 6.19.0 < 6.19.7 | 6.19.7 |
| linux | linux_kernel | >= 6.2 < 6.6.130 | 6.6.130 |
| linux | linux_kernel | >= 6.2.0 < 6.6.130 | 6.6.130 |
| linux | linux_kernel | >= 6.7 < 6.12.78 | 6.12.78 |
| linux | linux_kernel | >= 6.7.0 < 6.12.78 | 6.12.78 |
| msrc | azl3_kernel_6.6.126.1-1_on_azure_linux_3.0 | — | — |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vendor_msrc7.8HIGH
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GHSA
GHSA-f429-w42v-q89c: In the Linux kernel, the following vulnerability has been resolved:
wifi: libertas: fix use-after-free in lbs_free_adapter()
The lbs_free_adapter()
ghsa_unreviewed·2026-03-25
CVE-2026-23281 GHSA-f429-w42v-q89c: In the Linux kernel, the following vulnerability has been resolved:
wifi: libertas: fix use-after-free in lbs_free_adapter()
The lbs_free_adapter()
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
OSV
CVE-2026-23281: In the Linux kernel, the following vulnerability has been resolved: wifi: libertas: fix use-after-free in lbs_free_adapter() The lbs_free_adapter() fu
osv·2026-03-25
CVE-2026-23281 CVE-2026-23281: In the Linux kernel, the following vulnerability has been resolved: wifi: libertas: fix use-after-free in lbs_free_adapter() The lbs_free_adapter() fu
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 ensu
OSV
wifi: libertas: fix use-after-free in lbs_free_adapter()
osv·2026-03-25
CVE-2026-23281 wifi: libertas: fix use-after-free in lbs_free_adapter()
wifi: libertas: fix use-after-free in lbs_free_adapter()
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-
Red Hat
kernel: wifi: libertas: fix use-after-free in lbs_free_adapter()
vendor_redhat·2026-03-25
CVE-2026-23281 CWE-821 kernel: wifi: libertas: fix use-after-free in lbs_free_adapter()
kernel: wifi: libertas: fix use-after-free in lbs_free_adapter()
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
Microsoft
wifi: libertas: fix use-after-free in lbs_free_adapter()
vendor_msrc·2026-03-10·CVSS 7.8
CVE-2026-23281 [HIGH] wifi: libertas: fix use-after-free in lbs_free_adapter()
wifi: libertas: fix use-after-free in lbs_free_adapter()
Mariner: Mariner
Linux: Linux
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Reference: https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade
Debian
CVE-2026-23281: linux - In the Linux kernel, the following vulnerability has been resolved: wifi: liber...
vendor_debian·2026
CVE-2026-23281 CVE-2026-23281: linux - In the Linux kernel, the following vulnerability has been resolved: wifi: liber...
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 ensu
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/03cc8f90d0537fcd4985c3319b4fafbf2e3fb1f0https://git.kernel.org/stable/c/09f3c30ab3b1371eaf9676a1b8add57bca763083https://git.kernel.org/stable/c/3c5c818c78b03a1725f3dcd566865c77b48dd3a6https://git.kernel.org/stable/c/3f9dec4a6d95d7f1f5e9e9dfdfa173c053bba8dchttps://git.kernel.org/stable/c/a9f55b14486426d907459bced5825a25063bd922https://git.kernel.org/stable/c/b15e0fa7adb4de3a03aee9e6fc4d83e5cf0a65e4https://git.kernel.org/stable/c/d0155fe68f31b339961cf2d4f92937d57e9384e6https://git.kernel.org/stable/c/ed7d30f90b77f73a47498686ede83f622b7e4f0d
2026-03-25
Published