CVE-2026-90295: falha em Linux
cpufreq: imx6q: fix out-of-bounds write when probed more than once
Publicada em
3Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackepss 0.2%
probabilidade de exploração
0.2%top 90% das CVEs
exploração observada
nãonenhuma fonte reporta
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.
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Referências
https://git.kernel.org/stable/c/263a35331169390f7f9ccb51d74e668610199af4https://git.kernel.org/stable/c/49f2f9b1d0cc76cf221306fc707703205bd27073https://git.kernel.org/stable/c/55516986a3d81325c84f2d4ae9cd03116bc63599https://git.kernel.org/stable/c/55864b26c22cbd4b2e0d36154a8c35931c2e133bhttps://git.kernel.org/stable/c/8c3afcf27fa4582c1ab912503dc8a4ebb8dc0f82https://git.kernel.org/stable/c/aaa66e60c0e21d19993a95bc3718dc29eb2d3192https://git.kernel.org/stable/c/b166bb79b7ef36b4f1d6d1f40d1a72b2eb0a56b9https://git.kernel.org/stable/c/c5135bc34ea37e9d19f758e61ac44415afb3891a