Memory has always been a scarce resource in computing systems, but the problem seems to have worsened recently. In particular, the worldwide shortage of memory chips has led to a renewed focus by systems developers on reducing memory usage. During the memory-management microconference at the 2026 Linux Plumbers Conference, Will Deacon discussed one specific consumer of memory that is being re-examined: kernel stacks.

Security updates have been issued by AlmaLinux (buildah, expat, grafana, grafana-pcp, httpd, iperf3, openssh, php, php8.4, php:7.4, php:8.2, and php:8.3), Debian (aide, chromium, clamav, erlang, linux-6.12, roundcube, unbound, and webkit2gtk), Fedora (bind9-next, ca-certificates, clevis-pin-trustee, golang-x-mobile, knot-resolver, maradns, ntpsec, php, socat, and vlc), Mageia (golang, jq, msgpack, open-isns, perl-Mozilla-CA, roundcubemail, and sudo), Oracle (.NET 10.0, .NET 8.0, .NET 9.0, cockpit-files, cockpit-machines, fetchmail, glycin-loaders, golang, jackson-core, librsvg2, mariadb11.8, openexr, openssh, php, php8.4, php:7.4, php:8.2, php:8.3, postgresql:16, qt5-qtbase, rust-sequoia-sq, and xorg-x11-server-Xwayland), Red Hat (ca-certificates and opentelemetry-collector), SUSE (aliyun-cli, amazon-ecs-init, bcel, coreutils, cups-filters, cyrus-sasl, distribution, expat, firefox, go1.26, go1.26-openssl, go1.27, guava, mutt, nvidia-open-driver-G07-signed, p11-kit, php74, php8, podman, python-soupsieve, python313-datamodel-code-generator, python313-Django5, thunderbird, and webkit2gtk3), and Ubuntu (openvpn, python-tornado, and zlib).