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wire 2026-07-12
stories 9
RSS Archive Reviews

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X86 FIXES PATCH KERNEL RESOURCE LEAKS AND SECURITY HOLES OVERNIGHT

By RepoJournal · Filed · About Linux · Composed from the cited sources · methodology

Linus Torvalds Sandipan Das
2 people shipped this
Linus Torvalds @torvalds 3 cited Sandipan Das @sandip4n 1 cited

Linus pulled urgent x86 and io_uring patches that close resource leaks, fix a perf security hole leaking kernel addresses to userspace, and restore critical RCU read sections that were dropped mid-merge window.

The x86 urgent batch [1] is the most critical merge of the day: three separate resctrl fixes from Tony Luck and Reinette Chatre address resource leaks, umount races, and a double-free that would crash systems under load. Ingo also landed a GPU display fallback fix [1] for multi-GPU bootup failures on certain hardware, plus a cache invalidation fix [1] that restores a WBINVD call to SNP bootstrap to reverse a regression introduced earlier in the merge window. The io_uring batch [2] restores full RCU protection in io_req_local_work_add(), which was mistakenly dropped during the DEFER_TASKRUN rework. A perf security hole [3] now filters kernel addresses from user-requested branch stacks on AMD Zen 3 systems, closing an exposure that leaked kernel pointers to unprivileged processes. Block layer fixes [4] prevent RCU stalls from buggy polling drivers and close a potential deadlock on zone revalidation failures.

Action items

References

  1. [1] Merge tag 'x86-urgent-2026-07-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip torvalds/linux ↗
  2. [2] Merge tag 'io_uring-7.2-20260710' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux torvalds/linux ↗
  3. [3] perf/x86/amd/brs: Fix kernel address leakage torvalds/linux ↗
  4. [4] Merge tag 'block-7.2-20260710' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux torvalds/linux ↗

$ ls linux/reviews/ # the step-back reads

the week in review Omarchy polkit PAM stack skipped system-auth the month in review Linux 7.3 rc cycle fixes cgroup kill, SMB corruption
Full archive → Weekly reviews →

Quick answers

What shipped in Linux on July 12, 2026?
Linus pulled urgent x86 and io_uring patches that close resource leaks, fix a perf security hole leaking kernel addresses to userspace, and restore critical RCU read sections that were dropped mid-merge window. In total, 9 commits landed.
Who contributed to Linux on July 12, 2026?
2 developers shipped this update, including Linus Torvalds and Sandipan Das.
What were the notable Linux updates?
Merge tag 'x86-urgent-2026-07-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip, Merge tag 'io_uring-7.2-20260710' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux, and perf/x86/amd/brs: Fix kernel address leakage.
♥

$ log Linux --recent

drm-fixes backs out dma-buf debug, vfs closes pathwalk use-after-frees 29 shipped Netlink stops hashing the net pointer, stmmac clears a stuck RGMII interrupt 27 shipped Poly1305 carry fix lands, Omarchy locks down N1x laptops and idle fingerprint readers 23 shipped Omarchy copies agent logins over SSH, kernel queues 7.4 merges 106 shipped

$ log --all # elsewhere on the wire

Alignment & Post-training verl rejects conflicting vLLM engine_kwargs, open-instruct adds MILES OPD behind a Megatron learner Interpretability nnsight 0.8.0 cuts import time from 7.6s to 1.6s

$ ls showcases/

Safety Evals AI Red Teaming Agent Security Interpretability Alignment & Post-training

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