CVE-2021-35940 · cross-distro fix matrix

CVE-2021-35940: An out-of-bounds array read in the apr_time_exp*() functions was fixed in the Apache Portable Runtime 1.6.3 release (CVE-2017-12613). The fix for this issue was not carried forward to the APR 1.7.x branch, and hence version 1.7.0 regressed compared to 1.6.3 and is vulnerable to the same issue.

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

Fix per ecosystem

Each block below is a distro release where CVE-2021-35940 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

apr→ fixed in1.7.0-6+deb11u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y apr
```

Debian bookworm

Source: Debian Security Tracker

apr→ fixed in1.7.0-7urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y apr
```

Debian trixie

Source: Debian Security Tracker

apr→ fixed in1.7.0-7urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y apr
```

Alpine v3.20

Source: Alpine secdb

apr→ fixed in1.7.0-r2
```
apk update && apk add --upgrade apr
```

Alpine v3.21

Source: Alpine secdb

apr→ fixed in1.7.0-r2
```
apk update && apk add --upgrade apr
```

Alpine edge

Source: Alpine secdb

apr→ fixed in1.7.0-r2
```
apk update && apk add --upgrade apr
```

Alpine v3.18

Source: Alpine secdb

apr→ fixed in1.7.0-r2
```
apk update && apk add --upgrade apr
```

Alpine v3.19

Source: Alpine secdb

apr→ fixed in1.7.0-r2
```
apk update && apk add --upgrade apr
```

Are YOU affected by CVE-2021-35940?

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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