CVE-2009-1959 · cross-distro fix matrix

CVE-2009-1959: Off-by-one error in the event_wallops function in fe-common/irc/fe-events.c in irssi 0.8.13 allows remote IRC servers to cause a denial of service (crash) via an empty command, which triggers a one-byte buffer under-read and a one-byte buffer underflow.

Affects 3 Linux releases across 3 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2009-1959 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

irssi→ fixed in0.8.13-2urgency: low

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

Debian bookworm

Source: Debian Security Tracker

irssi→ fixed in0.8.13-2urgency: low

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

Debian trixie

Source: Debian Security Tracker

irssi→ fixed in0.8.13-2urgency: low

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

Are YOU affected by CVE-2009-1959?

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

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