CVE-2025-52497 · cross-distro fix matrix

CVE-2025-52497: Mbed TLS before 3.6.4 has a PEM parsing one-byte heap-based buffer underflow, in mbedtls_pem_read_buffer and two mbedtls_pk_parse functions, via untrusted PEM input.

Affects 5 Linux releases across 5 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2025-52497 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

mbedtls→ fixed in2.16.9-0.1+deb11u2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y mbedtls
```

Debian trixie

Source: Debian Security Tracker

mbedtls→ fixed in3.6.4-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y mbedtls
```

Alpine v3.20

Source: Alpine secdb

mbedtls→ fixed in3.6.4-r0
```
apk update && apk add --upgrade mbedtls
```

Alpine v3.21

Source: Alpine secdb

mbedtls→ fixed in3.6.4-r0
```
apk update && apk add --upgrade mbedtls
```

Alpine edge

Source: Alpine secdb

mbedtls→ fixed in3.6.4-r0
```
apk update && apk add --upgrade mbedtls
```

Are YOU affected by CVE-2025-52497?

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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