UBUNTU-CVE-2025-38297
In the Linux kernel, the following vulnerability has been resolved: PM: EM: Fix potential division-by-zero error in em_compute_costs() When the device is of a non-CPU type, table[i].performance won't be initialized in the previous em_init_performance(), resulting in division by zero when calculating costs in em_compute_costs(). Since the 'cost' algorithm is only used for EAS energy efficiency calculations and is currently not utilized by other device drivers, we should add the _is_cpu_device(dev) check to prevent this division-by-zero issue.
02 / AFFECTED SOFTWARE
Affected packages
13 explicit affected versions
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12 explicit affected versions
14 explicit affected versions
10 explicit affected versions
1 explicit affected versions
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12 explicit affected versions
12 explicit affected versions
7 explicit affected versions
10 explicit affected versions
37 explicit affected versions
13 explicit affected versions
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5 explicit affected versions
26 explicit affected versions
13 explicit affected versions
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13 explicit affected versions
6 explicit affected versions
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23 explicit affected versions
10 explicit affected versions
11 explicit affected versions
12 explicit affected versions
7 explicit affected versions
12 explicit affected versions
10 explicit affected versions
26 explicit affected versions
5 explicit affected versions
13 explicit affected versions
16 explicit affected versions
3 explicit affected versions
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51 explicit affected versions
18 explicit affected versions
12 explicit affected versions
27 explicit affected versions
8 explicit affected versions
5 explicit affected versions
8 explicit affected versions
10 explicit affected versions
7 explicit affected versions
13 explicit affected versions
13 explicit affected versions
7 explicit affected versions
8 explicit affected versions
10 explicit affected versions
12 explicit affected versions
3 explicit affected versions
44 explicit affected versions
16 explicit affected versions
3 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: PM: EM: Fix potential division-by-zero error in em_compute_costs() When the device is of a non-CPU type, table[i].performance won't be initialized in the previous em_init_performance(), resulting in division by zero when calculating costs in em_compute_costs(). Since the 'cost' algorithm is only used for EAS energy efficiency calculations and is currently not utilized by other device drivers, we should add the _is_cpu_device(dev) check to prevent this division-by-zero issue.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/179c0c7044a378198adb36f2a12410ab68cc730a
- https://git.kernel.org/stable/c/14cbdd64f3870cf0a2d94b87919b9056448c59a0
- https://git.kernel.org/stable/c/179c0c7044a378198adb36f2a12410ab68cc730a
- https://git.kernel.org/stable/c/81d72f9241d884ec29524431f74f8009310cfa0c
- https://ubuntu.com/security/CVE-2025-38297
- https://ubuntu.com/security/notices/USN-7769-1
- https://ubuntu.com/security/notices/USN-7769-2
- https://ubuntu.com/security/notices/USN-7769-3
- https://ubuntu.com/security/notices/USN-7770-1
- https://ubuntu.com/security/notices/USN-7771-1
- https://ubuntu.com/security/notices/USN-7789-1
- https://ubuntu.com/security/notices/USN-7789-2
- https://www.cve.org/CVERecord?id=CVE-2025-38297