CVE-2026-68410: Linux kernel · wifi: libertas: fix memory leak in helper_firmware_cb()
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in eaeb1d74a47fc4864f2c754c0b9d654a9b7dc55c : update Linux kernel when convenient.
Data as of 6 Nov 2026, 17:19 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
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 eaeb1d74a47fc4864f2c754c0b9d654a9b7dc55c, d497b7566e74920acfe283dd6b2cbf1682890796, ce829286f4935f1eb6b5dcb64da02910ce149c76 +5
Exploitation evidence
Disclosed: evidence found.
CVE published 10 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: fix memory leak in helper_firmware_cb() helper_firmware_cb() neglects to free the single-stage firmware image after a successful async load, leading to a memory leak in the USB firmware-download path. Fix this memory leak by calling release_firmware() immediately after lbs_fw_loaded() returns. The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in the current wireless tree. An x86_64 allyesconfig build showed no new warnings. As we do not have compatible Libertas USB hardware for exercising this firmware-download path, no runtime testing was able to be performed.
References
- git.kernel.org/stable/c/6c1f54a04813676c5a2150d99331c8d21f199374 (opens in a new tab)
- git.kernel.org/stable/c/7f28722b3e4e0c8d49c859fea4a9b1fa13b5ae06 (opens in a new tab)
- git.kernel.org/stable/c/ce829286f4935f1eb6b5dcb64da02910ce149c76 (opens in a new tab)
- git.kernel.org/stable/c/d497b7566e74920acfe283dd6b2cbf1682890796 (opens in a new tab)
- git.kernel.org/stable/c/eaeb1d74a47fc4864f2c754c0b9d654a9b7dc55c (opens in a new tab)
- git.kernel.org/stable/c/6cda91bbb8dc3d22ef0323008a12dcf73a5129da (opens in a new tab)
- git.kernel.org/stable/c/644640cde2fb216e6567de5eee780a38dbc95928 (opens in a new tab)
- git.kernel.org/stable/c/63c2391deefb31e1b801b7f32bd502ca4808639b (opens in a new tab)