CVE-2012-6538 · cross-distro fix matrix

CVE-2012-6538: The copy_to_user_auth function in net/xfrm/xfrm_user.c in the Linux kernel before 3.6 uses an incorrect C library function for copying a string, which allows local users to obtain sensitive information from kernel heap memory by leveraging the CAP_NET_ADMIN capability.

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

Fix per ecosystem

Each block below is a distro release where CVE-2012-6538 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

linux→ fixed in3.2.32-1urgency: low

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

Debian bookworm

Source: Debian Security Tracker

linux→ fixed in3.2.32-1urgency: low

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

Debian trixie

Source: Debian Security Tracker

linux→ fixed in3.2.32-1urgency: low

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

Are YOU affected by CVE-2012-6538?

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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