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.
References
Configurations
Configuration 1 (hide)
|
History
24 Nov 2025, 17:26
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-125 | |
| First Time |
Linux
Linux linux Kernel |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.1 |
| CPE | cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
|
| References | () https://git.kernel.org/stable/c/01039fb8e90c9cb684430414bff70cea9eb168c5 - Patch | |
| References | () https://git.kernel.org/stable/c/14d260f94ff89543597ffea13db8b277a810e08e - Patch | |
| References | () https://git.kernel.org/stable/c/794ded0bc461287a268bed21fea2eebb6e5d232c - Patch | |
| References | () https://git.kernel.org/stable/c/b74ee4e301ca01e431e240c046173332966e2431 - Patch |
15 Sep 2025, 14:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-09-15 14:15
Updated : 2025-11-24 17:26
NVD link : CVE-2022-50239
Mitre link : CVE-2022-50239
CVE.ORG link : CVE-2022-50239
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-125
Out-of-bounds Read