Debian bullseye
Source: Debian Security Tracker
asterisk→ fixed in1:16.16.1~dfsg-1urgency: not yet assignedsudo apt-get install --only-upgrade -y asterisk
Back to CVE digest
CVE-2021-26717 · cross-distro fix matrix
CVE-2021-26717: An issue was discovered in Sangoma Asterisk 16.x before 16.16.1, 17.x before 17.9.2, and 18.x before 18.2.1 and Certified Asterisk before 16.8-cert6. When re-negotiating for T.38, if the initial remote response was delayed just enough, Asterisk would send both audio and T.38 in the SDP. If this happ
Affects 6 Linux releases across 6 (distro × package) combinations.
Fix per ecosystem
Each block below is a distro release where CVE-2021-26717 has a known fix. Run the listed command on that distro to remediate.
Alpine v3.20
Source: Alpine secdb
asterisk→ fixed in18.2.1-r0apk update && apk add --upgrade asterisk
Alpine v3.21
Source: Alpine secdb
asterisk→ fixed in18.2.1-r0apk update && apk add --upgrade asterisk
Alpine edge
Source: Alpine secdb
asterisk→ fixed in18.2.1-r0apk update && apk add --upgrade asterisk
Alpine v3.18
Source: Alpine secdb
asterisk→ fixed in18.2.1-r0apk update && apk add --upgrade asterisk
Alpine v3.19
Source: Alpine secdb
asterisk→ fixed in18.2.1-r0apk update && apk add --upgrade asterisk
Are YOU affected by CVE-2021-26717?
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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