{"id":"CVE-2026-31464","revision":"39a0216a4de442948508a54cd4802e74","records":[{"revision":"39a0216a4de442948508a54cd4802e74","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-31464","aliases":[],"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":0,"publishedAt":"2026-04-22T13:53:54.97+00:00","modifiedAt":"2026-10-19T18:35:49.523+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/scsi/ibmvscsi/ibmvfc.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"072b91f9c6510d0ec4a49d07dbc318760c7da7b3\",\n                            \"lessThan\": \"d842348f8a00d5b1d7358f207eb34ffcf5b16df3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"072b91f9c6510d0ec4a49d07dbc318760c7da7b3\",\n                            \"lessThan\": \"a007246cb6c9ebdc93dafbf63cc2d43d98f402cc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"072b91f9c6510d0ec4a49d07dbc318760c7da7b3\",\n                            \"lessThan\": \"394a1cac3c12fdd7d77f19ccfd222ab5ff87ef89\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"072b91f9c6510d0ec4a49d07dbc318760c7da7b3\",\n                            \"lessThan\": \"4ed727e35b0ab17d3eeeb1e8023768396e2be161\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"072b91f9c6510d0ec4a49d07dbc318760c7da7b3\",\n                            \"lessThan\": \"d1466bf991b2343cf2ba8336e440c8faf3cbb780\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"072b91f9c6510d0ec4a49d07dbc318760c7da7b3\",\n                            \"lessThan\": \"786f10b1966e485046839f992e89f2c18cbd1983\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"072b91f9c6510d0ec4a49d07dbc318760c7da7b3\",\n                            \"lessThan\": \"bae4df0a643fa7f84663473aa3082a9c2ed139db\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"072b91f9c6510d0ec4a49d07dbc318760c7da7b3\",\n                            \"lessThan\": \"61d099ac4a7a8fb11ebdb6e2ec8d77f38e77362f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/scsi/ibmvscsi/ibmvfc.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.27\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.27\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.253\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.203\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.168\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.131\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.80\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.21\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19.11\",\n                            \"lessThanOrEqual\": \"6.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","score":8.1,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/d842348f8a00d5b1d7358f207eb34ffcf5b16df3","https://git.kernel.org/stable/c/a007246cb6c9ebdc93dafbf63cc2d43d98f402cc","https://git.kernel.org/stable/c/394a1cac3c12fdd7d77f19ccfd222ab5ff87ef89","https://git.kernel.org/stable/c/4ed727e35b0ab17d3eeeb1e8023768396e2be161","https://git.kernel.org/stable/c/d1466bf991b2343cf2ba8336e440c8faf3cbb780","https://git.kernel.org/stable/c/786f10b1966e485046839f992e89f2c18cbd1983","https://git.kernel.org/stable/c/bae4df0a643fa7f84663473aa3082a9c2ed139db","https://git.kernel.org/stable/c/61d099ac4a7a8fb11ebdb6e2ec8d77f38e77362f"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-31464","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-31464","identifiers":["CVE-2026-31464"]},"retained":false,"historicalAffected":[]}],"coverage":[]}