CVE-2006-4434 · cross-distro fix matrix

CVE-2006-4434: Use-after-free vulnerability in Sendmail before 8.13.8 allows remote attackers to cause a denial of service (crash) via a long "header line", which causes a previously freed variable to be referenced. NOTE: the original developer has disputed the severity of this issue, saying "The only denial of se

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

Fix per ecosystem

Each block below is a distro release where CVE-2006-4434 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

sendmail→ fixed in8.13.8-1urgency: medium

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

Debian bookworm

Source: Debian Security Tracker

sendmail→ fixed in8.13.8-1urgency: medium

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

Debian trixie

Source: Debian Security Tracker

sendmail→ fixed in8.13.8-1urgency: medium

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

Are YOU affected by CVE-2006-4434?

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.

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