Cloudflare Workers Spectre Attack Leaks JWT From Co-Located Worker at 12 Bits/Second

Cybersecurity researchers have disclosed details of a remote Spectre attack against Cloudflare Workers that leaked a JSON Web Token JWT from a co-located Worker in the production environment at up to 12 bits per second, 360 times the rate of an earlier attack demonstrated in 2021. The end-to-end...

PT-2026-34242

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A flaw exists in the kernel's handling of protection keys for address ranges. The subroutine responsible for updating page table entries fails to account for 1GB largepage mappings creat...

FreeBSD -- Missing large page handling in pmap_pkru_update_range()

Problem Description: In order to apply a particular protection key to an address range, the kernel must update the corresponding page table entries. The subroutine which handled this failed to take into account the presence of 1GB largepage mappings created using the shmcreatelargepage3 interface...

FreeBSD-SA-26:11.amd64

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-26:11.amd64 Security Advisory The FreeBSD Project Topic: Missing large page handling in pmappkruupdaterange Category: core Module: amd64 Announced: 2026-04-21...

s390/pkey: Prevent overflow in size calculation for memdup_user()

...

SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2019:2412-1)

The SUSE Linux Enterprise 12 SP4 kernel was updated to receive various security and bugfixes. The following new features were implemented : jscSLE-4875: CML New device IDs for CML jscSLE-7294: Add cpufreq driver for Raspberry Pi fate322438: Integrate P9 XIVE support on PowerVM only fate322447: Ad...

ALPINE-CVE-2017-10916

The vCPU context-switch implementation in Xen through 4.8.x improperly interacts with the Memory Protection Extensions MPX and Protection Key PKU features, which makes it easier for guest OS users to defeat ASLR and other protection mechanisms, aka XSA-220...