CVE-2026-68410

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1dfba3060fe7ee03ccec25a91d35085142dfc295 < d497b7566e74920acfe283dd6b2cbf1682890796affected
LinuxLinux1dfba3060fe7ee03ccec25a91d35085142dfc295 < eaeb1d74a47fc4864f2c754c0b9d654a9b7dc55caffected
LinuxLinux1dfba3060fe7ee03ccec25a91d35085142dfc295 < 6cda91bbb8dc3d22ef0323008a12dcf73a5129daaffected
LinuxLinux1dfba3060fe7ee03ccec25a91d35085142dfc295 < 644640cde2fb216e6567de5eee780a38dbc95928affected
LinuxLinux1dfba3060fe7ee03ccec25a91d35085142dfc295 < 63c2391deefb31e1b801b7f32bd502ca4808639baffected
LinuxLinux3.13affected
LinuxLinux0 < 3.13unaffected
LinuxLinux6.6.148 <= 6.6.*unaffected
LinuxLinux6.12.101 <= 6.12.*unaffected
LinuxLinux6.18.42 <= 6.18.*unaffected
LinuxLinux7.1.6 <= 7.1.*unaffected
LinuxLinux7.2-rc4 <= *unaffected

Weaknesses

References