CVE-2021-23240 · cross-distro fix matrix

CVE-2021-23240: selinux_edit_copy_tfiles in sudoedit in Sudo before 1.9.5 allows a local unprivileged user to gain file ownership and escalate privileges by replacing a temporary file with a symlink to an arbitrary file target. This affects SELinux RBAC support in permissive mode. Machines without SELinux are not v

Affects 8 Linux releases across 8 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2021-23240 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

sudo→ fixed in1.9.5-1urgency: unimportant

sudo apt-get install --only-upgrade -y sudo

Debian bookworm

Source: Debian Security Tracker

sudo→ fixed in1.9.5-1urgency: unimportant

sudo apt-get install --only-upgrade -y sudo

Debian trixie

Source: Debian Security Tracker

sudo→ fixed in1.9.5-1urgency: unimportant

sudo apt-get install --only-upgrade -y sudo

Alpine v3.20

Source: Alpine secdb

sudo→ fixed in1.9.5-r0
```
apk update && apk add --upgrade sudo
```

Alpine v3.21

Source: Alpine secdb

sudo→ fixed in1.9.5-r0
```
apk update && apk add --upgrade sudo
```

Alpine edge

Source: Alpine secdb

sudo→ fixed in1.9.5-r0
```
apk update && apk add --upgrade sudo
```

Alpine v3.18

Source: Alpine secdb

sudo→ fixed in1.9.5-r0
```
apk update && apk add --upgrade sudo
```

Alpine v3.19

Source: Alpine secdb

sudo→ fixed in1.9.5-r0
```
apk update && apk add --upgrade sudo
```

Are YOU affected by CVE-2021-23240?

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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