CVE-2023-40548 · cross-distro fix matrix

CVE-2023-40548: A buffer overflow was found in Shim in the 32-bit system. The overflow happens due to an addition operation involving a user-controlled value parsed from the PE binary being used by Shim. This value is further used for memory allocation operations, leading to a heap-based buffer overflow. This flaw

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

Fix per ecosystem

Each block below is a distro release where CVE-2023-40548 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

shim→ fixed in15.8-1~deb11u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y shim
```

Debian bookworm

Source: Debian Security Tracker

shim→ fixed in15.8-1~deb12u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y shim
```

Debian trixie

Source: Debian Security Tracker

shim→ fixed in15.8-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y shim
```

Are YOU affected by CVE-2023-40548?

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

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