CVE-2026-98653
KVM: s390: Fix _gaccess_shadow_fault()
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 7.2.9
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
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.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From e38c884df92119d96f652d51f82661dd2fc0b885 · fixed in 94c43c7df46433ed4d1e18f13770b019ba977bd8; From e38c884df92119d96f652d51f82661dd2fc0b885 · fixed in faff4c8ff3dbec6d71b89dd281a0d17c4478fa44
- Linux Linux
7.0
- KernelLinux
From 7.0.0 · fixed in 7.2.9