CVE-2026-72070: Linux kernel · wifi: libertas_tf: fix use-after-free in lbtf_free_adapter()
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in fcff712d0e3d183843ec3916470ee6cc3455baad : update Linux kernel when convenient.
Data as of 6 Nov 2026, 17:04 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Thin evidence
One scorer or none- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-11-06.
- Patch
- Available – fixed in fcff712d0e3d183843ec3916470ee6cc3455baad, bd75636681588c67006279abdb9a76a708b3ce29, bcf7968cb97ce4312588042cf2712f04caff6d8f +5
Exploitation evidence
Disclosed: evidence found.
CVE published 15 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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Description
In the Linux kernel, the following vulnerability has been resolved: wifi: libertas_tf: fix use-after-free in lbtf_free_adapter() lbtf_free_adapter() calls timer_delete(&priv->command_timer), which does not wait for a running command_timer_fn() callback. lbtf_free_adapter() runs on the teardown path right before ieee80211_free_hw() frees priv, both in lbtf_remove_card() and in the probe error path. command_timer is armed by mod_timer() in lbtf_cmd() whenever a firmware command is sent. command_timer_fn() dereferences priv. If a command times out as the device is removed, command_timer_fn() runs concurrently with teardown and dereferences priv after it has been freed. This is the same use-after-free that commit 03cc8f90d053 ("wifi: libertas: fix use-after-free in lbs_free_adapter()") fixed in the sibling libertas driver. The libertas_tf variant has the identical pattern and was left unchanged. Use timer_delete_sync() so any in-flight callback completes before priv is freed.
References
- git.kernel.org/stable/c/bd75636681588c67006279abdb9a76a708b3ce29 (opens in a new tab)
- git.kernel.org/stable/c/2fba1d3b2f031a2c68e566a6d45cc5b7a8d6683d (opens in a new tab)
- git.kernel.org/stable/c/9392fd5de555272449d3d8c63410ea00f8ec853a (opens in a new tab)
- git.kernel.org/stable/c/4714e95f5d61cb9c5c7c6c4e68b618f37bc6ffcf (opens in a new tab)
- git.kernel.org/stable/c/066b59e84f90d270cc15f0370166155aca507630 (opens in a new tab)
- git.kernel.org/stable/c/fcff712d0e3d183843ec3916470ee6cc3455baad (opens in a new tab)
- git.kernel.org/stable/c/bcf7968cb97ce4312588042cf2712f04caff6d8f (opens in a new tab)
- git.kernel.org/stable/c/aa6dcd5c8dd9ba1d7d0f60093bcda41c0d6d438d (opens in a new tab)