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CVE-2019-18660 is an information-disclosure vulnerability in Linux kernel versions before 5.4.1 on PowerPC systems. The PowerPC software mitigation did not completely flush the Count Cache, an indirect-branch prediction structure, and the Link Stack, a return-address prediction structure, across applicable security boundaries. The incomplete flush permits Spectre-RSB-like speculative-execution cache side-channel attacks across syscall or process boundaries.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
13 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An incomplete Spectre-RSB mitigation on PowerPC Linux kernel systems that can expose information.
An incomplete Spectre-RSB mitigation in the Linux kernel for PowerPC systems that can lead to information exposure.
Incomplete Spectre_RSB mitigation application on PowerPC Linux systems, allowing local information disclosure.
Incomplete Spectre_RSB mitigation on PowerPC Linux kernel systems permits a local attacker to potentially expose sensitive information.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.