StackPatch is liveSee product

Back to CVE digest
CVE-2021-41072 · cross-distro fix matrix

CVE-2021-41072: squashfs_opendir in unsquash-2.c in Squashfs-Tools 4.5 allows Directory Traversal, a different vulnerability than CVE-2021-40153. A squashfs filesystem that has been crafted to include a symbolic link and then contents under the same filename in a filesystem can cause unsquashfs to first create the

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

Fix per ecosystem

Each block below is a distro release where CVE-2021-41072 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

  • squashfs-tools→ fixed in1:4.4-2+deb11u2urgency: not yet assigned
    sudo apt-get install --only-upgrade -y squashfs-tools

Debian bookworm

Source: Debian Security Tracker

  • squashfs-tools→ fixed in1:4.5-3urgency: not yet assigned
    sudo apt-get install --only-upgrade -y squashfs-tools

Debian trixie

Source: Debian Security Tracker

  • squashfs-tools→ fixed in1:4.5-3urgency: not yet assigned
    sudo apt-get install --only-upgrade -y squashfs-tools

Alpine v3.20

Source: Alpine secdb

  • squashfs-tools→ fixed in4.5-r1
    apk update && apk add --upgrade squashfs-tools

Alpine v3.21

Source: Alpine secdb

  • squashfs-tools→ fixed in4.5-r1
    apk update && apk add --upgrade squashfs-tools

Alpine edge

Source: Alpine secdb

  • squashfs-tools→ fixed in4.5-r1
    apk update && apk add --upgrade squashfs-tools

Alpine v3.18

Source: Alpine secdb

  • squashfs-tools→ fixed in4.5-r1
    apk update && apk add --upgrade squashfs-tools

Alpine v3.19

Source: Alpine secdb

  • squashfs-tools→ fixed in4.5-r1
    apk update && apk add --upgrade squashfs-tools
Are YOU affected by CVE-2021-41072?

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-2021-41072dropped 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)