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CVE-2026-64283

In the Linux kernel, the following vulnerability has been resolved: KVM: guest_memfd: Treat memslot binding offset+size as unsigned values When binding a memslot to a guest_memfd file, treat the offset and size as unsigned values to fix a bug where the sum of the two can result in a false negative when checking for overflow against the size of the file. Passing unsigned values also avoids relying on somewhat obscure checks in other flows for safety, and tracks the offset and size as they are
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:4632d8a2cadce242e402f52d3200d17ca4de8842d004cab79bd1cd79aea104b5
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"affected","product":"Linux","programFiles":["virt/kvm/guest_memfd.c","virt/kvm/kvm_mm.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.8"},{"lessThan":"6.8","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:96795e58d40b3eb5464ad364318efe2721a8b9917ff98500c2e7d07fc3ba0a92 · sha256:d0411134687782a9… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["virt/kvm/guest_memfd.c","virt/kvm/kvm_mm.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"f3a98d5881b9bd4807f49156143565f6aabcef1e","status":"affected","version":"a7800aa80ea4d5356b8474c2302812e9d4926fa6","versionType":"git"},{"lessThan":"eba85fee7fc6cf28fec38a5bf3c378bef9a79ca6","status":"affected","version":"a7800aa80ea4d5356b8474c2302812e9d4926fa6","versionType":"git"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:96795e58d40b3eb5464ad364318efe2721a8b9917ff98500c2e7d07fc3ba0a92 · sha256:d0411134687782a9… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"affected","product":"Linux","programFiles":["virt/kvm/guest_memfd.c","virt/kvm/kvm_mm.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.8"},{"lessThan":"6.8","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:96795e58d40b3eb5464ad364318efe2721a8b9917ff98500c2e7d07fc3ba0a92 · sha256:d0411134687782a9… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Linux","programFiles":["virt/kvm/guest_memfd.c","virt/kvm/kvm_mm.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"f3a98d5881b9bd4807f49156143565f6aabcef1e","status":"affected","version":"a7800aa80ea4d5356b8474c2302812e9d4926fa6","versionType":"git"},{"lessThan":"eba85fee7fc6cf28fec38a5bf3c378bef9a79ca6","status":"affected","version":"a7800aa80ea4d5356b8474c2302812e9d4926fa6","versionType":"git"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:96795e58d40b3eb5464ad364318efe2721a8b9917ff98500c2e7d07fc3ba0a92 · sha256:d0411134687782a9… · /containers/cna/affected/0

Source references

2 source assertions
{"url":"https://git.kernel.org/stable/c/eba85fee7fc6cf28fec38a5bf3c378bef9a79ca6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:96795e58d40b3eb5464ad364318efe2721a8b9917ff98500c2e7d07fc3ba0a92 · sha256:d0411134687782a9… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/f3a98d5881b9bd4807f49156143565f6aabcef1e"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:96795e58d40b3eb5464ad364318efe2721a8b9917ff98500c2e7d07fc3ba0a92 · sha256:d0411134687782a9… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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