{"api_version":"1","generated_at":"2026-04-23T02:58:16+00:00","cve":"CVE-2026-31464","urls":{"html":"https://cve.report/CVE-2026-31464","api":"https://cve.report/api/cve/CVE-2026-31464.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-31464","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-31464"},"summary":{"title":"scsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done()\n\nA malicious or compromised VIO server can return a num_written value in the\ndiscover targets MAD response that exceeds max_targets. This value is\nstored directly in vhost->num_targets without validation, and is then used\nas the loop bound in ibmvfc_alloc_targets() to index into disc_buf[], which\nis only allocated for max_targets entries. Indices at or beyond max_targets\naccess kernel memory outside the DMA-coherent allocation.  The\nout-of-bounds data is subsequently embedded in Implicit Logout and PLOGI\nMADs that are sent back to the VIO server, leaking kernel memory.\n\nFix by clamping num_written to max_targets before storing it.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-04-22 14:16:42","updated_at":"2026-04-22 14:16:42"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/a007246cb6c9ebdc93dafbf63cc2d43d98f402cc","name":"https://git.kernel.org/stable/c/a007246cb6c9ebdc93dafbf63cc2d43d98f402cc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/394a1cac3c12fdd7d77f19ccfd222ab5ff87ef89","name":"https://git.kernel.org/stable/c/394a1cac3c12fdd7d77f19ccfd222ab5ff87ef89","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4ed727e35b0ab17d3eeeb1e8023768396e2be161","name":"https://git.kernel.org/stable/c/4ed727e35b0ab17d3eeeb1e8023768396e2be161","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d842348f8a00d5b1d7358f207eb34ffcf5b16df3","name":"https://git.kernel.org/stable/c/d842348f8a00d5b1d7358f207eb34ffcf5b16df3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/bae4df0a643fa7f84663473aa3082a9c2ed139db","name":"https://git.kernel.org/stable/c/bae4df0a643fa7f84663473aa3082a9c2ed139db","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d1466bf991b2343cf2ba8336e440c8faf3cbb780","name":"https://git.kernel.org/stable/c/d1466bf991b2343cf2ba8336e440c8faf3cbb780","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/61d099ac4a7a8fb11ebdb6e2ec8d77f38e77362f","name":"https://git.kernel.org/stable/c/61d099ac4a7a8fb11ebdb6e2ec8d77f38e77362f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/786f10b1966e485046839f992e89f2c18cbd1983","name":"https://git.kernel.org/stable/c/786f10b1966e485046839f992e89f2c18cbd1983","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-31464","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31464","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 d842348f8a00d5b1d7358f207eb34ffcf5b16df3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 a007246cb6c9ebdc93dafbf63cc2d43d98f402cc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 394a1cac3c12fdd7d77f19ccfd222ab5ff87ef89 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 4ed727e35b0ab17d3eeeb1e8023768396e2be161 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.203 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.168 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.131 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.80 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.21 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.11 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/scsi/ibmvscsi/ibmvfc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"d842348f8a00d5b1d7358f207eb34ffcf5b16df3","status":"affected","version":"072b91f9c6510d0ec4a49d07dbc318760c7da7b3","versionType":"git"},{"lessThan":"a007246cb6c9ebdc93dafbf63cc2d43d98f402cc","status":"affected","version":"072b91f9c6510d0ec4a49d07dbc318760c7da7b3","versionType":"git"},{"lessThan":"394a1cac3c12fdd7d77f19ccfd222ab5ff87ef89","status":"affected","version":"072b91f9c6510d0ec4a49d07dbc318760c7da7b3","versionType":"git"},{"lessThan":"4ed727e35b0ab17d3eeeb1e8023768396e2be161","status":"affected","version":"072b91f9c6510d0ec4a49d07dbc318760c7da7b3","versionType":"git"},{"lessThan":"d1466bf991b2343cf2ba8336e440c8faf3cbb780","status":"affected","version":"072b91f9c6510d0ec4a49d07dbc318760c7da7b3","versionType":"git"},{"lessThan":"786f10b1966e485046839f992e89f2c18cbd1983","status":"affected","version":"072b91f9c6510d0ec4a49d07dbc318760c7da7b3","versionType":"git"},{"lessThan":"bae4df0a643fa7f84663473aa3082a9c2ed139db","status":"affected","version":"072b91f9c6510d0ec4a49d07dbc318760c7da7b3","versionType":"git"},{"lessThan":"61d099ac4a7a8fb11ebdb6e2ec8d77f38e77362f","status":"affected","version":"072b91f9c6510d0ec4a49d07dbc318760c7da7b3","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/scsi/ibmvscsi/ibmvfc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.27"},{"lessThan":"2.6.27","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.253","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.203","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.168","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.131","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.80","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.21","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.253","versionStartIncluding":"2.6.27","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.203","versionStartIncluding":"2.6.27","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.168","versionStartIncluding":"2.6.27","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.131","versionStartIncluding":"2.6.27","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.80","versionStartIncluding":"2.6.27","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.21","versionStartIncluding":"2.6.27","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.11","versionStartIncluding":"2.6.27","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"2.6.27","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done()\n\nA malicious or compromised VIO server can return a num_written value in the\ndiscover targets MAD response that exceeds max_targets. This value is\nstored directly in vhost->num_targets without validation, and is then used\nas the loop bound in ibmvfc_alloc_targets() to index into disc_buf[], which\nis only allocated for max_targets entries. Indices at or beyond max_targets\naccess kernel memory outside the DMA-coherent allocation.  The\nout-of-bounds data is subsequently embedded in Implicit Logout and PLOGI\nMADs that are sent back to the VIO server, leaking kernel memory.\n\nFix by clamping num_written to max_targets before storing it."}],"providerMetadata":{"dateUpdated":"2026-04-22T13:53:54.970Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/d842348f8a00d5b1d7358f207eb34ffcf5b16df3"},{"url":"https://git.kernel.org/stable/c/a007246cb6c9ebdc93dafbf63cc2d43d98f402cc"},{"url":"https://git.kernel.org/stable/c/394a1cac3c12fdd7d77f19ccfd222ab5ff87ef89"},{"url":"https://git.kernel.org/stable/c/4ed727e35b0ab17d3eeeb1e8023768396e2be161"},{"url":"https://git.kernel.org/stable/c/d1466bf991b2343cf2ba8336e440c8faf3cbb780"},{"url":"https://git.kernel.org/stable/c/786f10b1966e485046839f992e89f2c18cbd1983"},{"url":"https://git.kernel.org/stable/c/bae4df0a643fa7f84663473aa3082a9c2ed139db"},{"url":"https://git.kernel.org/stable/c/61d099ac4a7a8fb11ebdb6e2ec8d77f38e77362f"}],"title":"scsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-31464","datePublished":"2026-04-22T13:53:54.970Z","dateReserved":"2026-03-09T15:48:24.097Z","dateUpdated":"2026-04-22T13:53:54.970Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-22 14:16:42","lastModifiedDate":"2026-04-22 14:16:42","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"31464","Ordinal":"1","Title":"scsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done()","CVE":"CVE-2026-31464","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"31464","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done()\n\nA malicious or compromised VIO server can return a num_written value in the\ndiscover targets MAD response that exceeds max_targets. This value is\nstored directly in vhost->num_targets without validation, and is then used\nas the loop bound in ibmvfc_alloc_targets() to index into disc_buf[], which\nis only allocated for max_targets entries. Indices at or beyond max_targets\naccess kernel memory outside the DMA-coherent allocation.  The\nout-of-bounds data is subsequently embedded in Implicit Logout and PLOGI\nMADs that are sent back to the VIO server, leaking kernel memory.\n\nFix by clamping num_written to max_targets before storing it.","Type":"Description","Title":"scsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done()"}]}}}