{"api_version":"1","generated_at":"2026-07-23T13:21:47+00:00","cve":"CVE-2026-64074","urls":{"html":"https://cve.report/CVE-2026-64074","api":"https://cve.report/api/cve/CVE-2026-64074.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64074","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64074"},"summary":{"title":"fs/statmount: fix slab out-of-bounds write in statmount_mnt_idmap","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/statmount: fix slab out-of-bounds write in statmount_mnt_idmap\n\nstatmount_mnt_idmap() writes one mapping with seq_printf() and then\nmanually advances seq->count to include the NUL separator.\n\nIf seq_printf() overflows, seq_set_overflow() sets seq->count to\nseq->size. The manual seq->count++ changes this to seq->size + 1.\nseq_has_overflowed() then no longer detects the overflow. The corrupted\ncount returns to statmount_string(), which later executes:\n\n    seq->buf[seq->count++] = '\\0';\n\nThis causes a 1-byte NULL out-of-bounds write on the dynamically\nallocated seq buffer.\n\nFix this by checking for overflow immediately after seq_printf().","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-19 16:17:48","updated_at":"2026-07-20 15:17:07"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/a3bf0f28d4ba16e1f35f8c983bb04426b87e2a78","name":"https://git.kernel.org/stable/c/a3bf0f28d4ba16e1f35f8c983bb04426b87e2a78","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/93614949dc86f068e3c32c32cf1ee2a2323177a7","name":"https://git.kernel.org/stable/c/93614949dc86f068e3c32c32cf1ee2a2323177a7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e37ea2c6f17f273813ea4e8e94c102591d598ce1","name":"https://git.kernel.org/stable/c/e37ea2c6f17f273813ea4e8e94c102591d598ce1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64074","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64074","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 37c4a9590e1efcae7749682239fc22a330d2d325 e37ea2c6f17f273813ea4e8e94c102591d598ce1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 37c4a9590e1efcae7749682239fc22a330d2d325 93614949dc86f068e3c32c32cf1ee2a2323177a7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 37c4a9590e1efcae7749682239fc22a330d2d325 a3bf0f28d4ba16e1f35f8c983bb04426b87e2a78 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.15","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.15 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":"64074","cve":"CVE-2026-64074","epss":"0.001660000","percentile":"0.061610000","score_date":"2026-07-20","updated_at":"2026-07-21 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the Linux kernel, the following vulnerability has been resolved:\n\nfs/statmount: fix slab out-of-bounds write in statmount_mnt_idmap\n\nstatmount_mnt_idmap() writes one mapping with seq_printf() and then\nmanually advances seq->count to include the NUL separator.\n\nIf seq_printf() overflows, seq_set_overflow() sets seq->count to\nseq->size. The manual seq->count++ changes this to seq->size + 1.\nseq_has_overflowed() then no longer detects the overflow. The corrupted\ncount returns to statmount_string(), which later executes:\n\n    seq->buf[seq->count++] = '\\0';\n\nThis causes a 1-byte NULL out-of-bounds write on the dynamically\nallocated seq buffer.\n\nFix this by checking for overflow immediately after seq_printf()."}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-07-20T13:43:02.576Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/e37ea2c6f17f273813ea4e8e94c102591d598ce1"},{"url":"https://git.kernel.org/stable/c/93614949dc86f068e3c32c32cf1ee2a2323177a7"},{"url":"https://git.kernel.org/stable/c/a3bf0f28d4ba16e1f35f8c983bb04426b87e2a78"}],"title":"fs/statmount: fix slab out-of-bounds write in statmount_mnt_idmap","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64074","datePublished":"2026-07-19T15:39:49.076Z","dateReserved":"2026-07-19T07:54:57.031Z","dateUpdated":"2026-07-20T13:43:02.576Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-19 16:17:48","lastModifiedDate":"2026-07-20 15:17:07","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64074","Ordinal":"1","Title":"fs/statmount: fix slab out-of-bounds write in statmount_mnt_idma","CVE":"CVE-2026-64074","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64074","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/statmount: fix slab out-of-bounds write in statmount_mnt_idmap\n\nstatmount_mnt_idmap() writes one mapping with seq_printf() and then\nmanually advances seq->count to include the NUL separator.\n\nIf seq_printf() overflows, seq_set_overflow() sets seq->count to\nseq->size. The manual seq->count++ changes this to seq->size + 1.\nseq_has_overflowed() then no longer detects the overflow. The corrupted\ncount returns to statmount_string(), which later executes:\n\n    seq->buf[seq->count++] = '\\0';\n\nThis causes a 1-byte NULL out-of-bounds write on the dynamically\nallocated seq buffer.\n\nFix this by checking for overflow immediately after seq_printf().","Type":"Description","Title":"fs/statmount: fix slab out-of-bounds write in statmount_mnt_idma"}]}}}