{"api_version":"1","generated_at":"2026-07-24T22:11:47+00:00","cve":"CVE-2026-64052","urls":{"html":"https://cve.report/CVE-2026-64052","api":"https://cve.report/api/cve/CVE-2026-64052.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64052","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64052"},"summary":{"title":"block: bio-integrity: Fix null-ptr-deref in bio_integrity_map_user()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nblock: bio-integrity: Fix null-ptr-deref in bio_integrity_map_user()\n\npin_user_pages_fast() can partially succeed and return the number of\npages that were actually pinned. However, the bio_integrity_map_user()\ndoes not handle this partial pinning. This leads to a general protection\nfault since bvec_from_pages() dereferences an unpinned page address,\nwhich is 0.\n\nTo fix this, add a check to verify that all requested memory is pinned.\nIf partial pinning occurs, unpin the memory and return -EFAULT.\n\nKernel Oops:\n\nOops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI\nKASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]\nCPU: 0 UID: 0 PID: 1061 Comm: nvme-passthroug Not tainted 7.0.0-11783-g90957f9314e8-dirty #16 PREEMPT(lazy)\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.17.0-0-gb52ca86e094d-prebuilt.qemu.org 04/01/2014\nRIP: 0010:bio_integrity_map_user.cold+0x1b0/0x9d6","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-19 16:17:45","updated_at":"2026-07-19 16:17:45"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/8fa244738641d95ea4d70e6f9a62778bba42a5b7","name":"https://git.kernel.org/stable/c/8fa244738641d95ea4d70e6f9a62778bba42a5b7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8582792cf23b3d94674d4d838f7cde9a28d0fcaf","name":"https://git.kernel.org/stable/c/8582792cf23b3d94674d4d838f7cde9a28d0fcaf","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/77c059f41e9395793917d067476f549a911d77d3","name":"https://git.kernel.org/stable/c/77c059f41e9395793917d067476f549a911d77d3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/76410790f1491c8e06a451045ae223a61c652455","name":"https://git.kernel.org/stable/c/76410790f1491c8e06a451045ae223a61c652455","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64052","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64052","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 492c5d455969fc2e829f26ed4c83487b068f0dd7 77c059f41e9395793917d067476f549a911d77d3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 492c5d455969fc2e829f26ed4c83487b068f0dd7 76410790f1491c8e06a451045ae223a61c652455 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 492c5d455969fc2e829f26ed4c83487b068f0dd7 8fa244738641d95ea4d70e6f9a62778bba42a5b7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 492c5d455969fc2e829f26ed4c83487b068f0dd7 8582792cf23b3d94674d4d838f7cde9a28d0fcaf git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.8","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.8 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.92 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.34 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.11 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"64052","cve":"CVE-2026-64052","epss":"0.001680000","percentile":"0.063830000","score_date":"2026-07-20","updated_at":"2026-07-21 00:13:14"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["block/bio-integrity.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"77c059f41e9395793917d067476f549a911d77d3","status":"affected","version":"492c5d455969fc2e829f26ed4c83487b068f0dd7","versionType":"git"},{"lessThan":"76410790f1491c8e06a451045ae223a61c652455","status":"affected","version":"492c5d455969fc2e829f26ed4c83487b068f0dd7","versionType":"git"},{"lessThan":"8fa244738641d95ea4d70e6f9a62778bba42a5b7","status":"affected","version":"492c5d455969fc2e829f26ed4c83487b068f0dd7","versionType":"git"},{"lessThan":"8582792cf23b3d94674d4d838f7cde9a28d0fcaf","status":"affected","version":"492c5d455969fc2e829f26ed4c83487b068f0dd7","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["block/bio-integrity.c"],"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":"6.12.*","status":"unaffected","version":"6.12.92","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.34","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.92","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.34","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.11","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"6.8","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nblock: bio-integrity: Fix null-ptr-deref in bio_integrity_map_user()\n\npin_user_pages_fast() can partially succeed and return the number of\npages that were actually pinned. However, the bio_integrity_map_user()\ndoes not handle this partial pinning. This leads to a general protection\nfault since bvec_from_pages() dereferences an unpinned page address,\nwhich is 0.\n\nTo fix this, add a check to verify that all requested memory is pinned.\nIf partial pinning occurs, unpin the memory and return -EFAULT.\n\nKernel Oops:\n\nOops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI\nKASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]\nCPU: 0 UID: 0 PID: 1061 Comm: nvme-passthroug Not tainted 7.0.0-11783-g90957f9314e8-dirty #16 PREEMPT(lazy)\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.17.0-0-gb52ca86e094d-prebuilt.qemu.org 04/01/2014\nRIP: 0010:bio_integrity_map_user.cold+0x1b0/0x9d6"}],"providerMetadata":{"dateUpdated":"2026-07-19T15:39:35.223Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/77c059f41e9395793917d067476f549a911d77d3"},{"url":"https://git.kernel.org/stable/c/76410790f1491c8e06a451045ae223a61c652455"},{"url":"https://git.kernel.org/stable/c/8fa244738641d95ea4d70e6f9a62778bba42a5b7"},{"url":"https://git.kernel.org/stable/c/8582792cf23b3d94674d4d838f7cde9a28d0fcaf"}],"title":"block: bio-integrity: Fix null-ptr-deref in bio_integrity_map_user()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64052","datePublished":"2026-07-19T15:39:35.223Z","dateReserved":"2026-07-19T07:54:57.029Z","dateUpdated":"2026-07-19T15:39:35.223Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-19 16:17:45","lastModifiedDate":"2026-07-19 16:17:45","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64052","Ordinal":"1","Title":"block: bio-integrity: Fix null-ptr-deref in bio_integrity_map_us","CVE":"CVE-2026-64052","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64052","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nblock: bio-integrity: Fix null-ptr-deref in bio_integrity_map_user()\n\npin_user_pages_fast() can partially succeed and return the number of\npages that were actually pinned. However, the bio_integrity_map_user()\ndoes not handle this partial pinning. This leads to a general protection\nfault since bvec_from_pages() dereferences an unpinned page address,\nwhich is 0.\n\nTo fix this, add a check to verify that all requested memory is pinned.\nIf partial pinning occurs, unpin the memory and return -EFAULT.\n\nKernel Oops:\n\nOops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI\nKASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]\nCPU: 0 UID: 0 PID: 1061 Comm: nvme-passthroug Not tainted 7.0.0-11783-g90957f9314e8-dirty #16 PREEMPT(lazy)\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.17.0-0-gb52ca86e094d-prebuilt.qemu.org 04/01/2014\nRIP: 0010:bio_integrity_map_user.cold+0x1b0/0x9d6","Type":"Description","Title":"block: bio-integrity: Fix null-ptr-deref in bio_integrity_map_us"}]}}}