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Databases & Infrastructure desk
PostgreSQL offline checksum flips can break or desync standbys
A regression from online checksums work, plus a long-standing gap in pg_checksums, can leave replicas verifying pages they never checksummed or silently diverge from the primary.
QEMU series makes Human Monitor Protocol optional at build time
Marc-André Lureau’s 50-patch work lets builds drop HMP for a QMP-only binary, shrinking size and attack surface.
PostgreSQL 19 features face revert debate after LLM bug tally
Haas flags foreign-key batching, REPACK, and online checksums as post-freeze risk areas; Gustafsson offers a checksums revert while others urge caution.
QEMU migration pull adds fast snapshot load and RDMA hardening
The update also closes CVE-2026-6426, tightens vmstate allocation checks, and fixes a vhost-user postcopy hang.
QEMU hardens IDE and AHCI against migration and unplug bugs
Denis V. Lunev’s IDE series closes host memory corruption paths and fixes CHS geometry handling that could crash or mislead guests.
QEMU fixes VGA text-mode out-of-bounds write after graphics switch
CVE-2026-77913 let a guest paint past the console surface with controlled palette values after a mode change.
QEMU series makes Human Monitor Protocol a compile-time option
A 49-patch effort lets builds drop HMP entirely so the binary speaks only QMP, shrinking the attack surface and clarifying the split between automation and interactive debugging.
QEMU 11.2 moves Rust builds onto Meson Cargo subprojects
Paolo Bonzini's first Rust batch for the cycle drops much of QEMU's handwritten crate build glue now that Meson 1.12 can drive Cargo natively.
QEMU TCG tests leave Makefiles behind for Meson
A large series from Pierrick Bouvier folds architecture test coverage into the main build so dependency and cross-compiler mistakes show up at configure time.
QEMU guest agent fixes root symlink flaw in SSH key commands
CVE-2026-12080 let unprivileged local users seize ownership of arbitrary root files when the agent added authorized keys.
QEMU guest agent plugs root escalation in SSH key commands
CVE-2026-12080 let a guest user turn authorized_keys injection into chown of arbitrary root-owned paths.
QEMU guest agent plugs root escalation in SSH key commands
CVE-2026-12080 let a local user turn a host-triggered authorized_keys update into ownership of arbitrary root files.
QEMU guest agent SSH key flaw lets users seize root files
CVE-2026-12080 is a symlink race in guest-ssh key handling that can hand ownership of arbitrary root-owned paths to an unprivileged guest user.
QEMU USB smartcard reader gets CVE fixes and xHCI repair
A 27-patch series hardens the emulated CCID device against out-of-bounds access, restores live migration, and makes it work with xHCI hosts.
QEMU virtio-gpu fix blocks guest data leak via short headers
Truncated control requests could return stale fence metadata to the guest; CVE-2026-18054 is closed by rejecting them.
QEMU 11.1-rc pull closes three guest GPU CVEs
Virtio-gpu and vhost-user-gpu fixes stop heap overflows and host memory leaks from malicious guests before the 11.1 release.
QEMU patches heap overflow in vhost-user-gpu backend
CVE-2026-15264 let a malicious guest overflow a host heap buffer via crafted 2D resource dimensions.
QEMU fixes guest-triggerable VGA heap overflow
A unit mismatch between text and graphics mode left a panning buffer undersized after mode switches, tracked as CVE-2026-17516.
QEMU fixes virtio-gpu OOB read from guest blob size
CVE-2026-66021 let a malicious guest inflate blob_size past its backing and trigger host reads on display refresh.
QEMU virtio-gpu fix stops stale fence data leak to guests
CVE-2026-18054 let truncated control requests expose leftover fence metadata from the host.
QEMU fixes virtio-net buffer overflow in RSC coalescing
CVE-2026-66900 let trailing IP padding defeat a bounds check and overflow a coalescing buffer.
QEMU patches QXL use-after-free on hot-unplug
CVE-2026-63322 left VM state handlers and bottom halves pointing at freed device memory after secondary display removal.
QEMU queues 9pfs and virtio-gpu security fixes
A 9p pull closes a read-only export bypass and backend UAFs; a separate virtio-gpu patch stops guest-driven out-of-bounds reads.
QEMU fixes DoS via zero-length packed virtio descriptors
A guest userspace driver could abort the hypervisor by feeding empty indirect tables into packed virtqueues.
QEMU patches virtio queue-size OOB flaw (CVE-2026-50626)
Guests could set virtio queues larger than the host allocated, enabling out-of-bounds access when in-order delivery was in use.
QEMU fixes virtio-scsi leak that could exhaust host memory
A reference-count error on malformed guest requests left SCSIRequest objects alive indefinitely, tracked as CVE-2026-61476.
QEMU fixes virtio-pmem use-after-free on hot-unplug
CVE-2026-63323 let flush completion callbacks touch a device object already freed during removal.
QEMU fixes virtio feature masking flaw that enabled host OOB reads
Unmasked guest feature bits could turn on virtio-net RSC without the headers the receive path assumed, triggering CVE-2026-63321.
QEMU patches libvduse OOB write via unchecked virtqueue size
CVE-2026-61402 let an untrusted vq size overrun the inflight log because libvduse trusted kernel-supplied values without a bounds check.
QEMU plugs virtio-rng use-after-free on hot-unplug
CVE-2026-50624 let a late entropy callback touch freed host memory after the guest RNG device was removed.
QEMU TCG tests head for Meson, spark cross-compiler debate
A 98-patch series would retire the TCG Makefile stack, but dropping host --cross-cc options has maintainers split on containers versus local toolchains.