CVE-2026-98713
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Apply the fine-grained UNDEFs without FEAT_FGT FGUs don't
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Published: Oct 18, 2026 · Last modified: Oct 19, 2026
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In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Apply the fine-grained UNDEFs without FEAT_FGT FGUs don't actually require hardware support, so don't gate fgt trap config insertion on FGT. This is the only action required to allow FGUs always, as kvm_calculate_traps() already computes the FGU bits with or without FEAT_FGT. This also fixes a spurious WARN when a TLBI OS is run on a guest in vEL1 without FEAT_TLBIOS on non FEAT_FGT hardware. In this configuration the course-grained HCR_EL2.TTLBOS trap reaches the handler handle_tlbi_el1(), which expects an EL1 TLBI only from vEL2. With FGUs enabled the UNDEF will be injected without needing the specific handler. [oliver: Take Wei-Lin's suggested changelog]
- git.kernel.orghttps://git.kernel.org/stable/c/1113374a17d7f7d16b02ee0bbd9b1e7a60cbb087
- git.kernel.orghttps://git.kernel.org/stable/c/2f4a15c52a552c5244ec27f4ca8bda855594f918
- git.kernel.orghttps://git.kernel.org/stable/c/4bdd2b3a708c1feb701cb8b62feb8ad2fd77bb07
- git.kernel.orghttps://git.kernel.org/stable/c/af3300b3a6bace925a496f3520e171c07b999c72
No related CVEs by CWE or product.