How severe is CVE-2025-39830?

CVE-2025-39830 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-39830 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-39830?

CVE-2025-39830 primarily affects Linux Linux Kernel. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-39830?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-39830 have an EU (EUVD) identifier?

Yes. CVE-2025-39830 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-29584.

When was CVE-2025-39830 published?

CVE-2025-39830 was published on 2025-09-16 and last updated on 2026-06-17.

CVE-2025-39830

CVE-2025-39830 is a medium-severity vulnerability in Linux Linux Kernel with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-401.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-29584
Weakness: CWE-401
Affected product: Linux Linux Kernel
Published: 2025-09-16
Last modified: 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: net/mlx5: HWS, Fix memory leak in hws_pool_buddy_init error path In the error path of hws_pool_buddy_init(), the buddy allocator cleanup doesn't free the allocator structure itself, causing a memory leak. Add the missing kfree() to properly release all allocated memory.

Frequently asked questions

What is CVE-2025-39830?: In the Linux kernel, the following vulnerability has been resolved: net/mlx5: HWS, Fix memory leak in hws_pool_buddy_init error path In the error path of hws_pool_buddy_init(), the buddy allocator cleanup doesn't free the allocator structure itself, causing a memory leak. Add the missing kfree() to properly release all allocated memory.
How severe is CVE-2025-39830?: CVE-2025-39830 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-39830 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-39830?: CVE-2025-39830 primarily affects Linux Linux Kernel. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-39830?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-39830 have an EU (EUVD) identifier?: Yes. CVE-2025-39830 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-29584.
When was CVE-2025-39830 published?: CVE-2025-39830 was published on 2025-09-16 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:*

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