{"api_version":"1","generated_at":"2026-06-13T23:45:08+00:00","cve":"CVE-2026-46022","urls":{"html":"https://cve.report/CVE-2026-46022","api":"https://cve.report/api/cve/CVE-2026-46022.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-46022","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-46022"},"summary":{"title":"misc: ibmasm: fix OOB MMIO read in ibmasm_handle_mouse_interrupt()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: ibmasm: fix OOB MMIO read in ibmasm_handle_mouse_interrupt()\n\nibmasm_handle_mouse_interrupt() performs an out-of-bounds MMIO read\nwhen the queue reader or writer index from hardware exceeds\nREMOTE_QUEUE_SIZE (60).\n\nA compromised service processor can trigger this by writing an\nout-of-range value to the reader or writer MMIO register before\nasserting an interrupt. Since writer is re-read from hardware on\nevery loop iteration, it can also be set to an out-of-range value\nafter the loop has already started.\n\nThe root cause is that get_queue_reader() and get_queue_writer() return\nraw readl() values that are passed directly into get_queue_entry(),\nwhich computes:\n\n  queue_begin + reader * sizeof(struct remote_input)\n\nwith no bounds check. This unchecked MMIO address is then passed to\nmemcpy_fromio(), reading 8 bytes from unintended device registers.\nFor sufficiently large values the address falls outside the PCI BAR\nmapping entirely, triggering a machine check exception.\n\nFix by checking both indices against REMOTE_QUEUE_SIZE at the top of\nthe loop body, before any call to get_queue_entry(). On an out-of-range\nvalue, reset the reader register to 0 via set_queue_reader() before\nbreaking, so that normal queue operation can resume if the corrupted\nhardware state is transient.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-27 14:17:20","updated_at":"2026-06-01 17:17:18"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/07c4f18b303106e6b24492c12b95d48a4b985841","name":"https://git.kernel.org/stable/c/07c4f18b303106e6b24492c12b95d48a4b985841","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fc7e9a74e32299d7e93e178ca482a0b59ef1595b","name":"https://git.kernel.org/stable/c/fc7e9a74e32299d7e93e178ca482a0b59ef1595b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/bac8643486f854dd53af9b23aea7dbbd9b7c1865","name":"https://git.kernel.org/stable/c/bac8643486f854dd53af9b23aea7dbbd9b7c1865","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/22a16d3eafee92a165c756081587c95850127107","name":"https://git.kernel.org/stable/c/22a16d3eafee92a165c756081587c95850127107","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6f6ecc9153df176e956d0664b56f93080b0a45f0","name":"https://git.kernel.org/stable/c/6f6ecc9153df176e956d0664b56f93080b0a45f0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f7e5b4eefd7be3e09f8bd5fee63ed478fd7446ab","name":"https://git.kernel.org/stable/c/f7e5b4eefd7be3e09f8bd5fee63ed478fd7446ab","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1ca75f6b74ec7f685464e5745ecfcf3a76d284e9","name":"https://git.kernel.org/stable/c/1ca75f6b74ec7f685464e5745ecfcf3a76d284e9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4b6e6ead556734bdc14024c5f837132b1e7a4b84","name":"https://git.kernel.org/stable/c/4b6e6ead556734bdc14024c5f837132b1e7a4b84","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-46022","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46022","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 278d72ae8803ffcd16070c95fe1d53f4466dc741 6f6ecc9153df176e956d0664b56f93080b0a45f0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 278d72ae8803ffcd16070c95fe1d53f4466dc741 bac8643486f854dd53af9b23aea7dbbd9b7c1865 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 278d72ae8803ffcd16070c95fe1d53f4466dc741 f7e5b4eefd7be3e09f8bd5fee63ed478fd7446ab git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 278d72ae8803ffcd16070c95fe1d53f4466dc741 fc7e9a74e32299d7e93e178ca482a0b59ef1595b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 278d72ae8803ffcd16070c95fe1d53f4466dc741 07c4f18b303106e6b24492c12b95d48a4b985841 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 278d72ae8803ffcd16070c95fe1d53f4466dc741 22a16d3eafee92a165c756081587c95850127107 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 278d72ae8803ffcd16070c95fe1d53f4466dc741 1ca75f6b74ec7f685464e5745ecfcf3a76d284e9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 278d72ae8803ffcd16070c95fe1d53f4466dc741 4b6e6ead556734bdc14024c5f837132b1e7a4b84 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.13","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.13 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.258 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.209 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.175 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.140 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.86 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.27 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.4 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"46022","cve":"CVE-2026-46022","epss":"0.000320000","percentile":"0.097350000","score_date":"2026-06-04","updated_at":"2026-06-05 00:02:15"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/misc/ibmasm/remote.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"6f6ecc9153df176e956d0664b56f93080b0a45f0","status":"affected","version":"278d72ae8803ffcd16070c95fe1d53f4466dc741","versionType":"git"},{"lessThan":"bac8643486f854dd53af9b23aea7dbbd9b7c1865","status":"affected","version":"278d72ae8803ffcd16070c95fe1d53f4466dc741","versionType":"git"},{"lessThan":"f7e5b4eefd7be3e09f8bd5fee63ed478fd7446ab","status":"affected","version":"278d72ae8803ffcd16070c95fe1d53f4466dc741","versionType":"git"},{"lessThan":"fc7e9a74e32299d7e93e178ca482a0b59ef1595b","status":"affected","version":"278d72ae8803ffcd16070c95fe1d53f4466dc741","versionType":"git"},{"lessThan":"07c4f18b303106e6b24492c12b95d48a4b985841","status":"affected","version":"278d72ae8803ffcd16070c95fe1d53f4466dc741","versionType":"git"},{"lessThan":"22a16d3eafee92a165c756081587c95850127107","status":"affected","version":"278d72ae8803ffcd16070c95fe1d53f4466dc741","versionType":"git"},{"lessThan":"1ca75f6b74ec7f685464e5745ecfcf3a76d284e9","status":"affected","version":"278d72ae8803ffcd16070c95fe1d53f4466dc741","versionType":"git"},{"lessThan":"4b6e6ead556734bdc14024c5f837132b1e7a4b84","status":"affected","version":"278d72ae8803ffcd16070c95fe1d53f4466dc741","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/misc/ibmasm/remote.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.13"},{"lessThan":"2.6.13","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.258","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.209","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.175","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.140","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.86","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.27","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.258","versionStartIncluding":"2.6.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.209","versionStartIncluding":"2.6.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.175","versionStartIncluding":"2.6.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.140","versionStartIncluding":"2.6.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.86","versionStartIncluding":"2.6.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.27","versionStartIncluding":"2.6.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.4","versionStartIncluding":"2.6.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1-rc1","versionStartIncluding":"2.6.13","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: ibmasm: fix OOB MMIO read in ibmasm_handle_mouse_interrupt()\n\nibmasm_handle_mouse_interrupt() performs an out-of-bounds MMIO read\nwhen the queue reader or writer index from hardware exceeds\nREMOTE_QUEUE_SIZE (60).\n\nA compromised service processor can trigger this by writing an\nout-of-range value to the reader or writer MMIO register before\nasserting an interrupt. Since writer is re-read from hardware on\nevery loop iteration, it can also be set to an out-of-range value\nafter the loop has already started.\n\nThe root cause is that get_queue_reader() and get_queue_writer() return\nraw readl() values that are passed directly into get_queue_entry(),\nwhich computes:\n\n  queue_begin + reader * sizeof(struct remote_input)\n\nwith no bounds check. This unchecked MMIO address is then passed to\nmemcpy_fromio(), reading 8 bytes from unintended device registers.\nFor sufficiently large values the address falls outside the PCI BAR\nmapping entirely, triggering a machine check exception.\n\nFix by checking both indices against REMOTE_QUEUE_SIZE at the top of\nthe loop body, before any call to get_queue_entry(). On an out-of-range\nvalue, reset the reader register to 0 via set_queue_reader() before\nbreaking, so that normal queue operation can resume if the corrupted\nhardware state is transient."}],"providerMetadata":{"dateUpdated":"2026-06-01T16:17:10.063Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/6f6ecc9153df176e956d0664b56f93080b0a45f0"},{"url":"https://git.kernel.org/stable/c/bac8643486f854dd53af9b23aea7dbbd9b7c1865"},{"url":"https://git.kernel.org/stable/c/f7e5b4eefd7be3e09f8bd5fee63ed478fd7446ab"},{"url":"https://git.kernel.org/stable/c/fc7e9a74e32299d7e93e178ca482a0b59ef1595b"},{"url":"https://git.kernel.org/stable/c/07c4f18b303106e6b24492c12b95d48a4b985841"},{"url":"https://git.kernel.org/stable/c/22a16d3eafee92a165c756081587c95850127107"},{"url":"https://git.kernel.org/stable/c/1ca75f6b74ec7f685464e5745ecfcf3a76d284e9"},{"url":"https://git.kernel.org/stable/c/4b6e6ead556734bdc14024c5f837132b1e7a4b84"}],"title":"misc: ibmasm: fix OOB MMIO read in ibmasm_handle_mouse_interrupt()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-46022","datePublished":"2026-05-27T12:56:26.791Z","dateReserved":"2026-05-13T15:03:33.092Z","dateUpdated":"2026-06-01T16:17:10.063Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-27 14:17:20","lastModifiedDate":"2026-06-01 17:17:18","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"46022","Ordinal":"1","Title":"misc: ibmasm: fix OOB MMIO read in ibmasm_handle_mouse_interrupt","CVE":"CVE-2026-46022","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"46022","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: ibmasm: fix OOB MMIO read in ibmasm_handle_mouse_interrupt()\n\nibmasm_handle_mouse_interrupt() performs an out-of-bounds MMIO read\nwhen the queue reader or writer index from hardware exceeds\nREMOTE_QUEUE_SIZE (60).\n\nA compromised service processor can trigger this by writing an\nout-of-range value to the reader or writer MMIO register before\nasserting an interrupt. Since writer is re-read from hardware on\nevery loop iteration, it can also be set to an out-of-range value\nafter the loop has already started.\n\nThe root cause is that get_queue_reader() and get_queue_writer() return\nraw readl() values that are passed directly into get_queue_entry(),\nwhich computes:\n\n  queue_begin + reader * sizeof(struct remote_input)\n\nwith no bounds check. This unchecked MMIO address is then passed to\nmemcpy_fromio(), reading 8 bytes from unintended device registers.\nFor sufficiently large values the address falls outside the PCI BAR\nmapping entirely, triggering a machine check exception.\n\nFix by checking both indices against REMOTE_QUEUE_SIZE at the top of\nthe loop body, before any call to get_queue_entry(). On an out-of-range\nvalue, reset the reader register to 0 via set_queue_reader() before\nbreaking, so that normal queue operation can resume if the corrupted\nhardware state is transient.","Type":"Description","Title":"misc: ibmasm: fix OOB MMIO read in ibmasm_handle_mouse_interrupt"}]}}}