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wire 2026-07-05
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RSS Archive Reviews

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S390 FIXES PATCH TWO KERNEL SECURITY ISSUES OVERNIGHT

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

The s390 architecture received critical patches for a cryptographic key verification flaw and a buffer reuse vulnerability that could expose kernel memory.

Linus merged the s390-7.2-3 fixes [1] addressing two security-class issues hitting production systems. The first kill a generic key-length check in PKEY_VERIFYPROTK that was mangling bit-size calculations, leaving protected key verification to fail silently instead of rejecting bad input. The second plugs a monwriter buffer reuse hole where the kernel wasn't validating record data length changes before copying user input, creating an out-of-bounds write path into kernel space [1]. In parallel, MIPS landed its own fix set [2] focused on architecture-specific stability: Ingenic USB PHY symbol enablement, Loongson64 IRQ work via self-IPI, highmem block removal checks, vDSO build salt, and DEC RTC deregistration on failure. Neither is a headline-grabbing universal issue, but the s390 cryptographic handling matters if you're running encrypted key workloads on IBM hardware.

Action items

References

  1. [1] Merge tag 's390-7.2-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux torvalds/linux ↗
  2. [2] Merge tag 'mips-fixes_7.2_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/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 5, 2026?
The s390 architecture received critical patches for a cryptographic key verification flaw and a buffer reuse vulnerability that could expose kernel memory. In total, 2 commits landed.
What were the notable Linux updates?
Merge tag 's390-7.2-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux and Merge tag 'mips-fixes_7.2_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux.
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$ 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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