CVE-2026-21945 · cross-distro fix matrix

CVE-2026-21945: Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Security). Supported versions that are affected are Oracle Java SE: 8u471, 8u471-b50, 8u471-perf, 11.0.29, 17.0.17, 21.0.9, 25.0.1; Oracle GraalVM for JDK: 17.0.17 an

Affects 5 Linux releases across 12 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2026-21945 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

openjdk-11→ fixed in11.0.30+7-1~deb11u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y openjdk-11
```
openjdk-17→ fixed in17.0.18+8-1~deb11u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y openjdk-17
```

Debian bookworm

Source: Debian Security Tracker

openjdk-17→ fixed in17.0.18+8-1~deb12u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y openjdk-17
```

Debian trixie

Source: Debian Security Tracker

openjdk-21→ fixed in21.0.10+7-1~deb13u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y openjdk-21
```
openjdk-25→ fixed in25.0.2+10-1~deb13u2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y openjdk-25
```

Alpine v3.21

Source: Alpine secdb

openjdk11→ fixed in11.0.30_p7-r0

apk update && apk add --upgrade openjdk11

openjdk17→ fixed in17.0.18_p8-r0

apk update && apk add --upgrade openjdk17

openjdk21→ fixed in21.0.10_p7-r0

apk update && apk add --upgrade openjdk21

Alpine edge

Source: Alpine secdb

openjdk11→ fixed in11.0.30_p7-r0

apk update && apk add --upgrade openjdk11

openjdk17→ fixed in17.0.18_p8-r0

apk update && apk add --upgrade openjdk17

openjdk21→ fixed in21.0.10_p7-r0

apk update && apk add --upgrade openjdk21

openjdk25→ fixed in25.0.2_p10-r0

apk update && apk add --upgrade openjdk25

Are YOU affected by CVE-2026-21945?

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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