Is CVE-2025-21788 in the CISA KEV catalog?

No. CVE-2025-21788 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-21788?

CVE-2025-21788 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2025-21788?

CVE-2025-21788 has an EPSS score of 0.20% (10th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-21788?

Upgrade linux on debian 13 to 6.12.16-1 or later. Fixes are available for 25 affected products.

CVE & CISA-KEV Catalog

CVE-2025-21788

MEDIUM

5.5

CVSS v3

NVD

Description

In the Linux kernel, the following vulnerability has been resolved: net: ethernet: ti: am65-cpsw: fix memleak in certain XDP cases If the XDP program doesn't result in XDP_PASS then we leak the memory allocated by am65_cpsw_build_skb(). It is pointless to allocate SKB memory before running the XDP program as we would be wasting CPU cycles for cases other than XDP_PASS. Move the SKB allocation after evaluating the XDP program result. This fixes the memleak. A performance boost is seen for XDP_DROP test. XDP_DROP test: Before: 460256 rx/s 0 err/s After: 784130 rx/s 0 err/s

CWE-401Missing Release of Memory (Memory Leak)

How to fix

Remediation Available

linuxDebian

Fixed in:6.12.16-1CVE-2025-21788

linux-azure-6.11Ubuntu

Fixed in:6.11.0-1015.15~24.04.1USN-7521-1

linux-gcp-6.11Ubuntu

Fixed in:6.11.0-1015.15~24.04.1USN-7521-1

linux-hwe-6.11Ubuntu

Fixed in:6.11.0-26.26~24.04.1USN-7521-1

linux-image-6.11.0-1014-lowlatencyUbuntu

Fixed in:6.11.0-1014.15~24.04.1USN-7521-3

linux-image-6.11.0-1014-lowlatency-64kUbuntu

Fixed in:6.11.0-1014.15~24.04.1USN-7521-3

linux-image-6.11.0-1015-azureUbuntu

Fixed in:6.11.0-1015.15~24.04.1USN-7521-1

linux-image-6.11.0-1015-azure-fdeUbuntu

Fixed in:6.11.0-1015.15~24.04.1USN-7521-1

linux-image-6.11.0-1015-gcpUbuntu

Fixed in:6.11.0-1015.15~24.04.1USN-7521-1

linux-image-6.11.0-1015-gcp-64kUbuntu

Fixed in:6.11.0-1015.15~24.04.1USN-7521-1

linux-image-6.11.0-1022-oemUbuntu

Fixed in:6.11.0-1022.22USN-7521-1

linux-image-6.11.0-26-genericUbuntu

Fixed in:6.11.0-26.26~24.04.1USN-7521-1

linux-image-6.11.0-26-generic-64kUbuntu

Fixed in:6.11.0-26.26~24.04.1USN-7521-1

linux-image-azureUbuntu

Fixed in:6.11.0-1015.15~24.04.1USN-7521-1

linux-image-azure-fdeUbuntu

Fixed in:6.11.0-1015.15~24.04.1USN-7521-1

linux-image-gcpUbuntu

Fixed in:6.11.0-1015.15~24.04.1USN-7521-1

linux-image-gcp-64kUbuntu

Fixed in:6.11.0-1015.15~24.04.1USN-7521-1

linux-image-generic-64k-hwe-24.04Ubuntu

Fixed in:6.11.0-26.26~24.04.1USN-7521-1

linux-image-generic-hwe-24.04Ubuntu

Fixed in:6.11.0-26.26~24.04.1USN-7521-1

linux-image-lowlatency-64k-hwe-24.04Ubuntu

Fixed in:6.11.0-1014.15~24.04.1USN-7521-3

linux-image-lowlatency-hwe-24.04Ubuntu

Fixed in:6.11.0-1014.15~24.04.1USN-7521-3

linux-image-oem-24.04bUbuntu

Fixed in:6.11.0-1022.22USN-7521-1

linux-image-virtual-hwe-24.04Ubuntu

Fixed in:6.11.0-26.26~24.04.1USN-7521-1

linux-lowlatency-hwe-6.11Ubuntu

Fixed in:6.11.0-1014.15~24.04.1USN-7521-3

linux-oem-6.11Ubuntu

Fixed in:6.11.0-1022.22USN-7521-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

0.20%probability of exploitation in 30 days

10thpercentile

Low risk: more likely to be exploited than 10% of all known CVEs.

References

Patch3

Related Vulnerabilities

Other CWE-401 (Missing Release of Memory (Memory Leak)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-13934	High	7.5	64%	-	Fix
CVE-2016-6304	High	7.5	63%	-	Fix
CVE-2019-12265	Medium	5.3	55%	-	Fix
CVE-2001-0136	Medium	5.0	45%	-	-
CVE-2016-4232	High	7.5	36%	-	-
CVE-2001-0543	Medium	5.0	21%	-	-

Embed a live status badge for CVE-2025-21788

Markdown

[![CVE-2025-21788](https://tridentstack.com/cve/badge/CVE-2025-21788.svg)](https://tridentstack.com/cve/CVE-2025-21788)

HTML

<a href="https://tridentstack.com/cve/CVE-2025-21788"><img src="https://tridentstack.com/cve/badge/CVE-2025-21788.svg" alt="CVE-2025-21788"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-01.