Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected b4573d1d657aae28bedf3a9a1f5367e09c80d1d6 before 263a35331169390f7f9ccb51d74e668610199af4; affected b4573d1d657aae28bedf3a9a1f5367e09c80d1d6 before 49f2f9b1d0cc76cf221306fc707703205bd27073; affected b4573d1d657aae28bedf3a9a1f5367e09c80d1d6 before c5135bc34ea37e9d19f758e61ac44415afb3891a; affected b4573d1d657aae28bedf3a9a1f5367e09c80d1d6 before 55864b26c22cbd4b2e0d36154a8c35931c2e133b; affected b4573d1d657aae28bedf3a9a1f5367e09c80d1d6 before b166bb79b7ef36b4f1d6d1f40d1a72b2eb0a56b9; affected b4573d1d657aae28bedf3a9a1f5367e09c80d1d6 before aaa66e60c0e21d19993a95bc3718dc29eb2d3192; affected b4573d1d657aae28bedf3a9a1f5367e09c80d1d6 before 55516986a3d81325c84f2d4ae9cd03116bc63599; affected b4573d1d657aae28bedf3a9a1f5367e09c80d1d6 before 8c3afcf27fa4582c1ab912503dc8a4ebb8dc0f82 |
| Linux / Linux | affected 3.14; unaffected 0 before 3.14; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
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