CVE-2026-98653KVM: s390: Fix _gaccess_shadow_fault()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 18, 2026
Affected products
Linux Linux linux:linux (from the name) | from e38c884df92119d96f652d51f82661dd2fc0b885 before 94c43c7df46433ed4d1e18f13770b019ba977bd8; from e38c884df92119d96f652d51f82661dd2fc0b885 before faff4c8ff3dbec6d71b89dd281a0d17c4478fa44 | CNA record |
References
- https://git.kernel.org/stable/c/94c43c7df46433ed4d1e18f13770b019ba977bd8
- https://git.kernel.org/stable/c/faff4c8ff3dbec6d71b89dd281a0d17c4478fa44
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.