cbcvebase.
CVE-2022-50239
published 2025-09-15

CVE-2022-50239: In the Linux kernel, the following vulnerability has been resolved: cpufreq: qcom: fix writes in read-only memory region This commit fixes a kernel oops…

PriorityP430high7.1CVSS 3.1
AVLACLPRLUINSUCHINAH
EPSS
0.15%
4.5th percentile
In the Linux kernel, the following vulnerability has been resolved: cpufreq: qcom: fix writes in read-only memory region This commit fixes a kernel oops because of a write in some read-only memory: [ 9.068287] Unable to handle kernel write to read-only memory at virtual address ffff800009240ad8 ..snip.. [ 9.138790] Internal error: Oops: 9600004f [#1] PREEMPT SMP ..snip.. [ 9.269161] Call trace: [ 9.276271] __memcpy+0x5c/0x230 [ 9.278531] snprintf+0x58/0x80 [ 9.282002] qcom_cpufreq_msm8939_name_version+0xb4/0x190 [ 9.284869] qcom_cpufreq_probe+0xc8/0x39c ..snip.. The following line defines a pointer that point to a char buffer stored in read-only memory: char *pvs_name = "speedXX-pvsXX-vXX"; This pointer is meant to hold a template "speedXX-pvsXX-vXX" where the XX values get overridden by the qcom_cpufreq_krait_name_version function. Since the template is actually stored in read-only memory, when the function executes the following call we get an oops: snprintf(*pvs_name, sizeof("speedXX-pvsXX-vXX"), "speed%d-pvs%d-v%d", speed, pvs, pvs_ver); To fix this issue, we instead store the template name onto the stack by using the following syntax: char pvs_name_buffer[] = "speedXX-pvsXX-vXX"; Because the `pvs_name` needs to be able to be assigned to NULL, the template buffer is stored in the pvs_name_buffer and not under the pvs_name variable.

Affected

14 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.0.6-1 (bookworm)linux 6.0.6-1 (bookworm)
linuxlinux——
linuxlinux>= a8811ec764f95a04ba82f6f457e28c5e9e36e36b < 794ded0bc461287a268bed21fea2eebb6e5d232c794ded0bc461287a268bed21fea2eebb6e5d232c
linuxlinux>= a8811ec764f95a04ba82f6f457e28c5e9e36e36b < 14d260f94ff89543597ffea13db8b277a810e08e14d260f94ff89543597ffea13db8b277a810e08e
linuxlinux>= a8811ec764f95a04ba82f6f457e28c5e9e36e36b < b74ee4e301ca01e431e240c046173332966e2431b74ee4e301ca01e431e240c046173332966e2431
linuxlinux>= a8811ec764f95a04ba82f6f457e28c5e9e36e36b < 01039fb8e90c9cb684430414bff70cea9eb168c501039fb8e90c9cb684430414bff70cea9eb168c5
linuxlinux_kernel——
linuxlinux_kernel>= 0 < 5.10.158-15.10.158-1
linuxlinux_kernel>= 0 < 6.0.6-16.0.6-1
linuxlinux_kernel>= 0 < 6.0.6-16.0.6-1
linuxlinux_kernel>= 0 < 6.0.6-16.0.6-1
linuxlinux_kernel>= 5.11 < 5.15.765.15.76
linuxlinux_kernel>= 5.16 < 6.0.66.0.6
linuxlinux_kernel>= 5.7 < 5.10.1525.10.152

CVSS provenance

nvdv3.17.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
osv7.1HIGH
vendor_debian7.1HIGH
vendor_redhat7.1HIGH
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