CVE-2026-90295

Summary

In the Linux kernel, the following vulnerability has been resolved:

cpufreq: imx6q: fix out-of-bounds write when probed more than once

imx6_soc_volt is allocated fresh on every probe, sized to the number of ARM OPPs:

imx6_soc_volt = devm_kcalloc(cpu_dev, num, sizeof(*imx6_soc_volt),
			     GFP_KERNEL);

but it is filled through soc_opp_count, which has static storage and is never reset. A second bind after an unbind keeps indexing from where the first one stopped, and writes past the end of the new array.

Unbinding and rebinding the driver on qemu's mcimx6ul-evk, under KASAN:

BUG: KASAN: slab-out-of-bounds in imx6q_cpufreq_probe+0x3b0/0xa34 Write of size 4 at addr c5e90480 by task binder/73 imx6q_cpufreq_probe from platform_probe+0x88/0xe4 platform_probe from really_probe+0x108/0x384 bind_store from kernfs_fop_write_iter+0x1b4/0x28c

The write lands one u32 past the end of the allocation.

soc_opp_count is only read a few lines below the loop that fills it, so it never needed static storage. Make it a local.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/263a35331169390f7f9ccb51d74e668610199af4
• https://git.kernel.org/stable/c/49f2f9b1d0cc76cf221306fc707703205bd27073
• https://git.kernel.org/stable/c/c5135bc34ea37e9d19f758e61ac44415afb3891a
• https://git.kernel.org/stable/c/55864b26c22cbd4b2e0d36154a8c35931c2e133b
• https://git.kernel.org/stable/c/b166bb79b7ef36b4f1d6d1f40d1a72b2eb0a56b9
• https://git.kernel.org/stable/c/aaa66e60c0e21d19993a95bc3718dc29eb2d3192
• https://git.kernel.org/stable/c/55516986a3d81325c84f2d4ae9cd03116bc63599
• https://git.kernel.org/stable/c/8c3afcf27fa4582c1ab912503dc8a4ebb8dc0f82

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