{"id":"CVE-2021-47407","state":"PUBLISHED","title":"KVM: x86: Handle SRCU initialization failure during page track init","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86: Handle SRCU initialization failure during page track init\n\nCheck the return of init_srcu_struct(), which can fail due to OOM, when\ninitializing the page track mechanism.  Lack of checking leads to a NULL\npointer deref found by a modified syzkaller.\n\n[Move the call towards the beginning of kvm_arch_init_vm. - Paolo]","publishedAt":"2024-05-21T15:03:59.991Z","updatedAt":"2026-05-11T13:54:07.782Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0eb05bf290cfe8610d9680b49abef37febd1c38a","status":"affected","lessThan":"deb2949417677649e2413266d7ce8c2ff73952b4","versionType":"git"},{"version":"0eb05bf290cfe8610d9680b49abef37febd1c38a","status":"affected","lessThan":"4664318f73e496cd22c71b10888e75434a123e23","versionType":"git"},{"version":"0eb05bf290cfe8610d9680b49abef37febd1c38a","status":"affected","lessThan":"eb7511bf9182292ef1df1082d23039e856d1ddfb","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/include/asm/kvm_page_track.h","arch/x86/kvm/mmu/page_track.c","arch/x86/kvm/x86.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.6","versionType":"semver"},{"version":"5.10.71","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.14.10","status":"unaffected","lessThanOrEqual":"5.14.*","versionType":"semver"},{"version":"5.15","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/include/asm/kvm_page_track.h","arch/x86/kvm/mmu/page_track.c","arch/x86/kvm/x86.c"]}],"references":["https://git.kernel.org/stable/c/deb2949417677649e2413266d7ce8c2ff73952b4","https://git.kernel.org/stable/c/4664318f73e496cd22c71b10888e75434a123e23","https://git.kernel.org/stable/c/eb7511bf9182292ef1df1082d23039e856d1ddfb"],"weaknesses":[],"ingestedAt":"2026-10-29T19:49:19.404Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/47xxx/CVE-2021-47407.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47407","state":"PUBLISHED","datePublished":"2024-05-21T15:03:59.991Z","dateUpdated":"2026-05-11T13:54:07.782Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-05-21T14:58:30.817Z"},"containers":{"cna":{"title":"KVM: x86: Handle SRCU initialization failure during page track init","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86: Handle SRCU initialization failure during page track init\n\nCheck the return of init_srcu_struct(), which can fail due to OOM, when\ninitializing the page track mechanism.  Lack of checking leads to a NULL\npointer deref found by a modified syzkaller.\n\n[Move the call towards the beginning of kvm_arch_init_vm. - Paolo]"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0eb05bf290cfe8610d9680b49abef37febd1c38a","status":"affected","lessThan":"deb2949417677649e2413266d7ce8c2ff73952b4","versionType":"git"},{"version":"0eb05bf290cfe8610d9680b49abef37febd1c38a","status":"affected","lessThan":"4664318f73e496cd22c71b10888e75434a123e23","versionType":"git"},{"version":"0eb05bf290cfe8610d9680b49abef37febd1c38a","status":"affected","lessThan":"eb7511bf9182292ef1df1082d23039e856d1ddfb","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/include/asm/kvm_page_track.h","arch/x86/kvm/mmu/page_track.c","arch/x86/kvm/x86.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.6","versionType":"semver"},{"version":"5.10.71","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.14.10","status":"unaffected","lessThanOrEqual":"5.14.*","versionType":"semver"},{"version":"5.15","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/include/asm/kvm_page_track.h","arch/x86/kvm/mmu/page_track.c","arch/x86/kvm/x86.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/deb2949417677649e2413266d7ce8c2ff73952b4"},{"url":"https://git.kernel.org/stable/c/4664318f73e496cd22c71b10888e75434a123e23"},{"url":"https://git.kernel.org/stable/c/eb7511bf9182292ef1df1082d23039e856d1ddfb"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T13:54:07.782Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"5.10.71"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"5.14.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"5.15"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/deb2949417677649e2413266d7ce8c2ff73952b4","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/4664318f73e496cd22c71b10888e75434a123e23","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/eb7511bf9182292ef1df1082d23039e856d1ddfb","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T05:39:58.900Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2021-47407","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T15:38:00.602784Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-09-11T17:32:57.180Z"}}]}}}