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VulnerabilityPublished Updated

CVE-2026-68410: Linux kernel · wifi: libertas: fix memory leak in helper_firmware_cb()

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in eaeb1d74a47fc4864f2c754c0b9d654a9b7dc55c : update Linux kernel when convenient.

Data as of 6 Nov 2026, 17:19 UTC

Severity
Unrated

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

  1. Disclosed: evidence found.

    CVE published 10 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 1dfba3060fe7ee03ccec25a91d35085142dfc295, < eaeb1d74a47fc4864f2c754c0b9d654a9b7dc55c
Fixed in
  • eaeb1d74a47fc4864f2c754c0b9d654a9b7dc55c
LinuxLinuxAffected
  • ≥ 1dfba3060fe7ee03ccec25a91d35085142dfc295, < d497b7566e74920acfe283dd6b2cbf1682890796
Fixed in
  • d497b7566e74920acfe283dd6b2cbf1682890796
LinuxLinuxAffected
  • ≥ 1dfba3060fe7ee03ccec25a91d35085142dfc295, < ce829286f4935f1eb6b5dcb64da02910ce149c76
Fixed in
  • ce829286f4935f1eb6b5dcb64da02910ce149c76
LinuxLinuxAffected
  • ≥ 1dfba3060fe7ee03ccec25a91d35085142dfc295, < 644640cde2fb216e6567de5eee780a38dbc95928
Fixed in
  • 644640cde2fb216e6567de5eee780a38dbc95928
LinuxLinuxAffected
  • ≥ 1dfba3060fe7ee03ccec25a91d35085142dfc295, < 63c2391deefb31e1b801b7f32bd502ca4808639b
Fixed in
  • 63c2391deefb31e1b801b7f32bd502ca4808639b
LinuxLinuxAffected
  • ≥ 1dfba3060fe7ee03ccec25a91d35085142dfc295, < 7f28722b3e4e0c8d49c859fea4a9b1fa13b5ae06
Fixed in
  • 7f28722b3e4e0c8d49c859fea4a9b1fa13b5ae06

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

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