Debian bookworm
Source: Debian Security Tracker
usbredir→ fixed in0.11.0-1urgency: not yet assignedsudo apt-get install --only-upgrade -y usbredir
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CVE-2021-3700 · cross-distro fix matrix
CVE-2021-3700: A use-after-free vulnerability was found in usbredir in versions prior to 0.11.0 in the usbredirparser_serialize() in usbredirparser/usbredirparser.c. This issue occurs when serializing large amounts of buffered write data in the case of a slow or blocked destination.
Affects 7 Linux releases across 7 (distro × package) combinations.
Fix per ecosystem
Each block below is a distro release where CVE-2021-3700 has a known fix. Run the listed command on that distro to remediate.
Debian trixie
Source: Debian Security Tracker
usbredir→ fixed in0.11.0-1urgency: not yet assignedsudo apt-get install --only-upgrade -y usbredir
Alpine v3.20
Source: Alpine secdb
usbredir→ fixed in0.12.0-r0apk update && apk add --upgrade usbredir
Alpine v3.21
Source: Alpine secdb
usbredir→ fixed in0.12.0-r0apk update && apk add --upgrade usbredir
Alpine edge
Source: Alpine secdb
usbredir→ fixed in0.12.0-r0apk update && apk add --upgrade usbredir
Alpine v3.18
Source: Alpine secdb
usbredir→ fixed in0.12.0-r0apk update && apk add --upgrade usbredir
Alpine v3.19
Source: Alpine secdb
usbredir→ fixed in0.12.0-r0apk update && apk add --upgrade usbredir
Are YOU affected by CVE-2021-3700?
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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