CVE-2026-98653None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: KVM: s390: Fix _gaccess_shadow_fault() In some circumstances, it is possible that the page of nested guest memory that is being shadowed is not present at all in the p…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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In the Linux kernel, the following vulnerability has been resolved:
KVM: s390: Fix _gaccess_shadow_fault()
In some circumstances, it is possible that the page of nested guest memory that is being shadowed is not present at all in the parent guest gmap. dat_entry_walk() will not find any leaf entry and return with -ENOENT, which will erroneously be propagated all the way to userspace.
Fix by manually calling gmap_link() on the memory of the nested guest that is being shadowed if the mapping was not already present.
Linux >= e38c884df92119d96f652d51f82661dd2fc0b885 < 94c43c7df46433ed4d1e18f13770b019ba977bd8Linux >= e38c884df92119d96f652d51f82661dd2fc0b885 < faff4c8ff3dbec6d71b89dd281a0d17c4478fa44Linux 7.0Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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