CVE-2023-4911 · cross-distro fix matrix

CVE-2023-4911: A buffer overflow was discovered in the GNU C Library's dynamic loader ld.so while processing the GLIBC_TUNABLES environment variable. This issue could allow a local attacker to use maliciously crafted GLIBC_TUNABLES environment variables when launching binaries with SUID permission to execute code

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

Actively exploited in the wild

CVE-2023-4911 is on the CISA Known Exploited Vulnerabilities catalog (added 2023-11-21)— meaning attackers have a working exploit and are using it now. This is a patch-tonight, not patch-someday.

EPSS:79% · 30-day exploit probability100th percentile

Fix per ecosystem

Each block below is a distro release where CVE-2023-4911 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

glibc→ fixed in2.31-13+deb11u7urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y glibc
```

Debian bookworm

Source: Debian Security Tracker

glibc→ fixed in2.36-9+deb12u3urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y glibc
```

Debian trixie

Source: Debian Security Tracker

glibc→ fixed in2.37-12urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y glibc
```

Are YOU affected by CVE-2023-4911?

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

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