{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46022", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.092Z", "datePublished": "2026-05-27T12:56:26.791Z", "dateUpdated": "2026-06-14T17:48:35.855Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-14T17:48:35.855Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/misc/ibmasm/remote.c"], "versions": [{"version": "278d72ae8803ffcd16070c95fe1d53f4466dc741", "lessThan": "6f6ecc9153df176e956d0664b56f93080b0a45f0", "status": "affected", "versionType": "git"}, {"version": "278d72ae8803ffcd16070c95fe1d53f4466dc741", "lessThan": "bac8643486f854dd53af9b23aea7dbbd9b7c1865", "status": "affected", "versionType": "git"}, {"version": "278d72ae8803ffcd16070c95fe1d53f4466dc741", "lessThan": "f7e5b4eefd7be3e09f8bd5fee63ed478fd7446ab", "status": "affected", "versionType": "git"}, {"version": "278d72ae8803ffcd16070c95fe1d53f4466dc741", "lessThan": "fc7e9a74e32299d7e93e178ca482a0b59ef1595b", "status": "affected", "versionType": "git"}, {"version": "278d72ae8803ffcd16070c95fe1d53f4466dc741", "lessThan": "07c4f18b303106e6b24492c12b95d48a4b985841", "status": "affected", "versionType": "git"}, {"version": "278d72ae8803ffcd16070c95fe1d53f4466dc741", "lessThan": "22a16d3eafee92a165c756081587c95850127107", "status": "affected", "versionType": "git"}, {"version": "278d72ae8803ffcd16070c95fe1d53f4466dc741", "lessThan": "1ca75f6b74ec7f685464e5745ecfcf3a76d284e9", "status": "affected", "versionType": "git"}, {"version": "278d72ae8803ffcd16070c95fe1d53f4466dc741", "lessThan": "4b6e6ead556734bdc14024c5f837132b1e7a4b84", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/misc/ibmasm/remote.c"], "versions": [{"version": "2.6.13", "status": "affected"}, {"version": "0", "lessThan": "2.6.13", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.140", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.86", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.27", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.4", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.13", "versionEndExcluding": "5.10.258"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.13", "versionEndExcluding": "5.15.209"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.13", "versionEndExcluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.13", "versionEndExcluding": "6.6.140"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.13", "versionEndExcluding": "6.12.86"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.13", "versionEndExcluding": "6.18.27"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.13", "versionEndExcluding": "7.0.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.13", "versionEndExcluding": "7.1"}]}]}], "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"}}}}

{}

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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."}], "id": "CVE-2026-46022", "lastModified": "2026-06-17T10:52:54.897", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "[email protected]", "type": "Primary"}]}, "published": "2026-05-27T14:17:20.670", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/07c4f18b303106e6b24492c12b95d48a4b985841"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1ca75f6b74ec7f685464e5745ecfcf3a76d284e9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/22a16d3eafee92a165c756081587c95850127107"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4b6e6ead556734bdc14024c5f837132b1e7a4b84"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6f6ecc9153df176e956d0664b56f93080b0a45f0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bac8643486f854dd53af9b23aea7dbbd9b7c1865"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f7e5b4eefd7be3e09f8bd5fee63ed478fd7446ab"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fc7e9a74e32299d7e93e178ca482a0b59ef1595b"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "[email protected]", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: misc: ibmasm: fix OOB MMIO read in ibmasm_handle_mouse_interrupt()", "id": "2481955", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2481955"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-1285", "details": ["A flaw was found in the Linux kernel's `ibmasm` module. A compromised service processor can exploit this by manipulating specific hardware registers, causing the system to read data from an unintended memory location. This out-of-bounds read can lead to a system crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-46022", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46022\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46022\nhttps://lore.kernel.org/linux-cve-announce/2026052747-CVE-2026-46022-f6dc@gregkh/T"], "threat_severity": "Moderate"}

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