CVE-2026-4878 · cross-distro fix matrix

CVE-2026-4878: USN-8193-1 fixed a vulnerability in libcap. This update provides the

Affects 9 Linux releases across 21 (distro × package) combinations. First disclosed: 2026-06-23.

Fix per ecosystem

Each block below is a distro release where CVE-2026-4878 has a known fix. Run the listed command on that distro to remediate.

Ubuntu bionic

Source: Ubuntu USN

libcap2→ fixed in1:2.25-1.2ubuntu0.1~esm2USN-8193-2
```
sudo apt-get install --only-upgrade -y libcap2
```
libcap-dev→ fixed in1:2.25-1.2ubuntu0.1~esm2USN-8193-2
```
sudo apt-get install --only-upgrade -y libcap-dev
```
libcap2-bin→ fixed in1:2.25-1.2ubuntu0.1~esm2USN-8193-2
```
sudo apt-get install --only-upgrade -y libcap2-bin
```
libpam-cap→ fixed in1:2.25-1.2ubuntu0.1~esm2USN-8193-2
```
sudo apt-get install --only-upgrade -y libpam-cap
```

Ubuntu focal

Source: Ubuntu USN

libcap2→ fixed in1:2.32-1ubuntu0.2+esm1USN-8193-2
```
sudo apt-get install --only-upgrade -y libcap2
```
libcap-dev→ fixed in1:2.32-1ubuntu0.2+esm1USN-8193-2
```
sudo apt-get install --only-upgrade -y libcap-dev
```
libcap2-bin→ fixed in1:2.32-1ubuntu0.2+esm1USN-8193-2
```
sudo apt-get install --only-upgrade -y libcap2-bin
```
libpam-cap→ fixed in1:2.32-1ubuntu0.2+esm1USN-8193-2
```
sudo apt-get install --only-upgrade -y libpam-cap
```

Ubuntu trusty

Source: Ubuntu USN

libcap2→ fixed in1:2.24-0ubuntu2+esm2USN-8193-2
```
sudo apt-get install --only-upgrade -y libcap2
```
libcap-dev→ fixed in1:2.24-0ubuntu2+esm2USN-8193-2
```
sudo apt-get install --only-upgrade -y libcap-dev
```
libcap2-bin→ fixed in1:2.24-0ubuntu2+esm2USN-8193-2
```
sudo apt-get install --only-upgrade -y libcap2-bin
```
libpam-cap→ fixed in1:2.24-0ubuntu2+esm2USN-8193-2
```
sudo apt-get install --only-upgrade -y libpam-cap
```

Ubuntu xenial

Source: Ubuntu USN

libcap2→ fixed in1:2.24-12ubuntu0.1~esm2USN-8193-2
```
sudo apt-get install --only-upgrade -y libcap2
```
libcap-dev→ fixed in1:2.24-12ubuntu0.1~esm2USN-8193-2
```
sudo apt-get install --only-upgrade -y libcap-dev
```
libcap2-bin→ fixed in1:2.24-12ubuntu0.1~esm2USN-8193-2
```
sudo apt-get install --only-upgrade -y libcap2-bin
```
libpam-cap→ fixed in1:2.24-12ubuntu0.1~esm2USN-8193-2
```
sudo apt-get install --only-upgrade -y libpam-cap
```

Debian bookworm

Source: Debian Security Tracker

libcap2→ fixed in1:2.66-4+deb12u3urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y libcap2
```

Debian trixie

Source: Debian Security Tracker

libcap2→ fixed in1:2.75-10+deb13u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y libcap2
```

Alpine v3.20

Source: Alpine secdb

libcap→ fixed in2.78-r0
```
apk update && apk add --upgrade libcap
```

Alpine v3.21

Source: Alpine secdb

libcap→ fixed in2.78-r0
```
apk update && apk add --upgrade libcap
```

Alpine edge

Source: Alpine secdb

libcap→ fixed in2.78-r0
```
apk update && apk add --upgrade libcap
```

Are YOU affected by CVE-2026-4878?

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

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