CVE-2009-4411 · cross-distro fix matrix

CVE-2009-4411: The (1) setfacl and (2) getfacl commands in XFS acl 2.2.47, when running in recursive (-R) mode, follow symbolic links even when the --physical (aka -P) or -L option is specified, which might allow local users to modify the ACL for arbitrary files or directories via a symlink attack.

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

Fix per ecosystem

Each block below is a distro release where CVE-2009-4411 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

acl→ fixed in2.2.49-2urgency: low

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

Debian bookworm

Source: Debian Security Tracker

acl→ fixed in2.2.49-2urgency: low

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

Debian trixie

Source: Debian Security Tracker

acl→ fixed in2.2.49-2urgency: low

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

Are YOU affected by CVE-2009-4411?

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

CVE-2009-4411dropped silently in your distro's update channel. Every new CVE is the same story. StackPatch runs the matcher hourly against all 5 sources and emails the exact remediation when something new applies to one of your servers. $99 lifetime, 50 founder seats, 30-day refund.

See StackPatch ($99 lifetime)