CVE-2025-21735 · cross-distro fix matrix

CVE-2025-21735: Qualys discovered that several vulnerabilities existed in the AppArmor

Affects 2 Linux releases across 50 (distro × package) combinations. First disclosed: 2026-05-11.

Fix per ecosystem

Each block below is a distro release where CVE-2025-21735 has a known fix. Run the listed command on that distro to remediate.

Ubuntu bionic

Source: Ubuntu USN

linux-azure-fips→ fixed in4.15.0-2109.115USN-8267-1

sudo apt-get install --only-upgrade -y linux-azure-fips

linux-azure-fips→ fixed in4.15.0.2109.105USN-8267-1

sudo apt-get install --only-upgrade -y linux-azure-fips

linux-azure-fips-4.15→ fixed in4.15.0.2109.105USN-8267-1

sudo apt-get install --only-upgrade -y linux-azure-fips-4.15

linux-azure-fips-cloud-tools-4.15.0-2109→ fixed in4.15.0-2109.115USN-8267-1

sudo apt-get install --only-upgrade -y linux-azure-fips-cloud-tools-4.15.0-2109

linux-azure-fips-headers-4.15.0-2109→ fixed in4.15.0-2109.115USN-8267-1

sudo apt-get install --only-upgrade -y linux-azure-fips-headers-4.15.0-2109

linux-azure-fips-tools-4.15.0-2109→ fixed in4.15.0-2109.115USN-8267-1

sudo apt-get install --only-upgrade -y linux-azure-fips-tools-4.15.0-2109

linux-buildinfo-4.15.0-2109-azure-fips→ fixed in4.15.0-2109.115USN-8267-1

sudo apt-get install --only-upgrade -y linux-buildinfo-4.15.0-2109-azure-fips

linux-cloud-tools-4.15.0-2109-azure-fips→ fixed in4.15.0-2109.115USN-8267-1

sudo apt-get install --only-upgrade -y linux-cloud-tools-4.15.0-2109-azure-fips

linux-cloud-tools-azure-fips→ fixed in4.15.0.2109.105USN-8267-1

sudo apt-get install --only-upgrade -y linux-cloud-tools-azure-fips

linux-cloud-tools-azure-fips-4.15→ fixed in4.15.0.2109.105USN-8267-1

sudo apt-get install --only-upgrade -y linux-cloud-tools-azure-fips-4.15

linux-headers-4.15.0-2109-azure-fips→ fixed in4.15.0-2109.115USN-8267-1

sudo apt-get install --only-upgrade -y linux-headers-4.15.0-2109-azure-fips

linux-headers-azure-fips→ fixed in4.15.0.2109.105USN-8267-1

sudo apt-get install --only-upgrade -y linux-headers-azure-fips

linux-headers-azure-fips-4.15→ fixed in4.15.0.2109.105USN-8267-1

sudo apt-get install --only-upgrade -y linux-headers-azure-fips-4.15

linux-image-4.15.0-2109-azure-fips→ fixed in4.15.0-2109.115USN-8267-1

sudo apt-get install --only-upgrade -y linux-image-4.15.0-2109-azure-fips

linux-image-azure-fips→ fixed in4.15.0.2109.105USN-8267-1

sudo apt-get install --only-upgrade -y linux-image-azure-fips

linux-image-azure-fips-4.15→ fixed in4.15.0.2109.105USN-8267-1

sudo apt-get install --only-upgrade -y linux-image-azure-fips-4.15

linux-image-hmac-4.15.0-2109-azure-fips→ fixed in4.15.0-2109.115USN-8267-1

sudo apt-get install --only-upgrade -y linux-image-hmac-4.15.0-2109-azure-fips

linux-image-unsigned-4.15.0-2109-azure-fips→ fixed in4.15.0-2109.115USN-8267-1

sudo apt-get install --only-upgrade -y linux-image-unsigned-4.15.0-2109-azure-fips

linux-image-unsigned-hmac-4.15.0-2109-azure-fips→ fixed in4.15.0-2109.115USN-8267-1

sudo apt-get install --only-upgrade -y linux-image-unsigned-hmac-4.15.0-2109-azure-fips

linux-modules-4.15.0-2109-azure-fips→ fixed in4.15.0-2109.115USN-8267-1

sudo apt-get install --only-upgrade -y linux-modules-4.15.0-2109-azure-fips

linux-modules-extra-4.15.0-2109-azure-fips→ fixed in4.15.0-2109.115USN-8267-1

sudo apt-get install --only-upgrade -y linux-modules-extra-4.15.0-2109-azure-fips

linux-modules-extra-azure-fips→ fixed in4.15.0.2109.105USN-8267-1

sudo apt-get install --only-upgrade -y linux-modules-extra-azure-fips

linux-modules-extra-azure-fips-4.15→ fixed in4.15.0.2109.105USN-8267-1

sudo apt-get install --only-upgrade -y linux-modules-extra-azure-fips-4.15

linux-signed-azure-fips→ fixed in4.15.0.2109.105USN-8267-1

sudo apt-get install --only-upgrade -y linux-signed-azure-fips

linux-signed-azure-fips-4.15→ fixed in4.15.0.2109.105USN-8267-1

sudo apt-get install --only-upgrade -y linux-signed-azure-fips-4.15

linux-signed-image-azure-fips→ fixed in4.15.0.2109.105USN-8267-1

sudo apt-get install --only-upgrade -y linux-signed-image-azure-fips

linux-signed-image-azure-fips-4.15→ fixed in4.15.0.2109.105USN-8267-1

sudo apt-get install --only-upgrade -y linux-signed-image-azure-fips-4.15

linux-tools-4.15.0-2109-azure-fips→ fixed in4.15.0-2109.115USN-8267-1

sudo apt-get install --only-upgrade -y linux-tools-4.15.0-2109-azure-fips

linux-tools-azure-fips→ fixed in4.15.0.2109.105USN-8267-1

sudo apt-get install --only-upgrade -y linux-tools-azure-fips

linux-tools-azure-fips-4.15→ fixed in4.15.0.2109.105USN-8267-1

sudo apt-get install --only-upgrade -y linux-tools-azure-fips-4.15

Ubuntu xenial

Source: Ubuntu USN

linux-azure→ fixed in4.15.0-1200.215~16.04.1USN-8267-1
```
sudo apt-get install --only-upgrade -y linux-azure
```
linux-oracle→ fixed in4.15.0-1153.164~16.04.1USN-8267-1
```
sudo apt-get install --only-upgrade -y linux-oracle
```
linux-azure→ fixed in4.15.0.1200.215~16.04.1USN-8267-1
```
sudo apt-get install --only-upgrade -y linux-azure
```
linux-azure-cloud-tools-4.15.0-1200→ fixed in4.15.0-1200.215~16.04.1USN-8267-1
```
sudo apt-get install --only-upgrade -y linux-azure-cloud-tools-4.15.0-1200
```
linux-azure-edge→ fixed in4.15.0.1200.215~16.04.1USN-8267-1
```
sudo apt-get install --only-upgrade -y linux-azure-edge
```
linux-azure-headers-4.15.0-1200→ fixed in4.15.0-1200.215~16.04.1USN-8267-1
```
sudo apt-get install --only-upgrade -y linux-azure-headers-4.15.0-1200
```
linux-azure-tools-4.15.0-1200→ fixed in4.15.0-1200.215~16.04.1USN-8267-1
```
sudo apt-get install --only-upgrade -y linux-azure-tools-4.15.0-1200
```
linux-buildinfo-4.15.0-1153-oracle→ fixed in4.15.0-1153.164~16.04.1USN-8267-1
```
sudo apt-get install --only-upgrade -y linux-buildinfo-4.15.0-1153-oracle
```
linux-buildinfo-4.15.0-1200-azure→ fixed in4.15.0-1200.215~16.04.1USN-8267-1
```
sudo apt-get install --only-upgrade -y linux-buildinfo-4.15.0-1200-azure
```
linux-cloud-tools-4.15.0-1200-azure→ fixed in4.15.0-1200.215~16.04.1USN-8267-1
```
sudo apt-get install --only-upgrade -y linux-cloud-tools-4.15.0-1200-azure
```
linux-cloud-tools-azure→ fixed in4.15.0.1200.215~16.04.1USN-8267-1
```
sudo apt-get install --only-upgrade -y linux-cloud-tools-azure
```
linux-cloud-tools-azure-edge→ fixed in4.15.0.1200.215~16.04.1USN-8267-1
```
sudo apt-get install --only-upgrade -y linux-cloud-tools-azure-edge
```
linux-headers-4.15.0-1153-oracle→ fixed in4.15.0-1153.164~16.04.1USN-8267-1
```
sudo apt-get install --only-upgrade -y linux-headers-4.15.0-1153-oracle
```
linux-headers-4.15.0-1200-azure→ fixed in4.15.0-1200.215~16.04.1USN-8267-1
```
sudo apt-get install --only-upgrade -y linux-headers-4.15.0-1200-azure
```
linux-headers-azure→ fixed in4.15.0.1200.215~16.04.1USN-8267-1
```
sudo apt-get install --only-upgrade -y linux-headers-azure
```
linux-headers-azure-edge→ fixed in4.15.0.1200.215~16.04.1USN-8267-1
```
sudo apt-get install --only-upgrade -y linux-headers-azure-edge
```
linux-headers-oracle→ fixed in4.15.0.1153.164~16.04.1USN-8267-1
```
sudo apt-get install --only-upgrade -y linux-headers-oracle
```
linux-image-4.15.0-1153-oracle→ fixed in4.15.0-1153.164~16.04.1USN-8267-1
```
sudo apt-get install --only-upgrade -y linux-image-4.15.0-1153-oracle
```
linux-image-4.15.0-1200-azure→ fixed in4.15.0-1200.215~16.04.1USN-8267-1
```
sudo apt-get install --only-upgrade -y linux-image-4.15.0-1200-azure
```
linux-image-azure→ fixed in4.15.0.1200.215~16.04.1USN-8267-1
```
sudo apt-get install --only-upgrade -y linux-image-azure
```

Are YOU affected by CVE-2025-21735?

5-second check on your actual server. Reads /etc/os-release, uname -r, and the distro's package manager; matches against this same cross-source index live.

curl https://mindsparkstack.com/scan.sh | bash

Form-based quickscan View on NVD

Continuous monitoring beats manual checking

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