Debian bookworm
Source: Debian Security Tracker
libgcrypt20→ fixed in1.9.4-2urgency: not yet assignedsudo apt-get install --only-upgrade -y libgcrypt20
Back to CVE digest
CVE-2021-33560 · cross-distro fix matrix
CVE-2021-33560: Libgcrypt before 1.8.8 and 1.9.x before 1.9.3 mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm, and the window size is not chosen appropriately. This, for example, affects use of ElGamal in OpenPGP.
Affects 7 Linux releases across 7 (distro × package) combinations.
Fix per ecosystem
Each block below is a distro release where CVE-2021-33560 has a known fix. Run the listed command on that distro to remediate.
Debian trixie
Source: Debian Security Tracker
libgcrypt20→ fixed in1.9.4-2urgency: not yet assignedsudo apt-get install --only-upgrade -y libgcrypt20
Alpine v3.20
Source: Alpine secdb
libgcrypt→ fixed in1.9.4-r0apk update && apk add --upgrade libgcrypt
Alpine v3.21
Source: Alpine secdb
libgcrypt→ fixed in1.9.4-r0apk update && apk add --upgrade libgcrypt
Alpine edge
Source: Alpine secdb
libgcrypt→ fixed in1.9.4-r0apk update && apk add --upgrade libgcrypt
Alpine v3.18
Source: Alpine secdb
libgcrypt→ fixed in1.9.4-r0apk update && apk add --upgrade libgcrypt
Alpine v3.19
Source: Alpine secdb
libgcrypt→ fixed in1.9.4-r0apk update && apk add --upgrade libgcrypt
Are YOU affected by CVE-2021-33560?
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
Continuous monitoring beats manual checking
CVE-2021-33560dropped silently in your distro's update channel. Every new CVE is the same story. StackPatch runs the matcher hourly against all 5 sources and emails the exact remediation when something new applies to one of your servers. $99 lifetime, 50 founder seats, 30-day refund.
See StackPatch ($99 lifetime)