CVE-2026-46190

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On 64-bit systems, this makes the\npassed length 8x larger than intended.\n\nInside spi_nor_print_flags(), the 'names_len' argument is used to\nbounds-check the 'names' array access. An out-of-bounds read occurs\nif a flag bit is set that exceeds the array's actual element count\nbut is within the inflated byte-size count.\n\nCorrect this by using ARRAY_SIZE() to pass the actual number of\nstring pointers in the array."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable code is a debugfs `params` file (mode 0444) under CONFIG_DEBUG_FS, reachable only by a local VFS read of /sys/kernel/debug/spi-nor/<dev>/params; there is no network or physical path.\nAC:L - While the read itself is reliable, the OOB only manifests if a flag bit \u226517 is set in nor->flags; per the directive to consider the most severe reasonable case and resolve uncertainty toward higher severity, the read is treated as reliably performable.\nPR:L - The file is created world-readable (0444), and on reasonable embedded/dev SPI-NOR deployments where debugfs is mounted and traversable by non-root, an unprivileged local user can read it.\nUI:N - Exploitation only requires the attacker to read the debugfs file; no victim action is needed.\nS:U - The defect is confined to the kernel's own memory and security authority with no crossing of a trust boundary such as VM or IOMMU.\nC:H - An out-of-bounds read that, when triggered, makes seq_puts() dereference an adjacent-memory-derived pointer and emit a kernel string into readable output \u2014 not strictly bounded to a few bytes.\nI:N - The operation is purely a read path emitting to a seq_file; it provides no memory-write or control-flow primitive.\nA:H - If the out-of-array slot holds a non-NULL invalid pointer, seq_puts() dereferences a wild pointer, which can oops/crash the kernel."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/mtd/spi-nor/debugfs.c"], "versions": [{"version": "0257be79fc4a16a3252ce80aa13b3640f728c425", "lessThan": "231b8e1f604f6e0a7e100536f506cdf482e2c5f5", "status": "affected", "versionType": "git"}, {"version": "0257be79fc4a16a3252ce80aa13b3640f728c425", "lessThan": "9a80c458320e0514e11945402dd6e48fcee05524", "status": "affected", "versionType": "git"}, {"version": "0257be79fc4a16a3252ce80aa13b3640f728c425", "lessThan": "ca18c180b053f6ce80394322b314ac721c316af7", "status": "affected", "versionType": "git"}, {"version": "0257be79fc4a16a3252ce80aa13b3640f728c425", "lessThan": "34bdcfb496b29f9a52431194f94473b37fb8c162", "status": "affected", "versionType": "git"}, {"version": "0257be79fc4a16a3252ce80aa13b3640f728c425", "lessThan": "c0b654bc0b76a1da102d9138be1ed1223bd99310", "status": "affected", "versionType": "git"}, {"version": "0257be79fc4a16a3252ce80aa13b3640f728c425", "lessThan": "e47029b977e747cb3a9174308fd55762cce70147", "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/mtd/spi-nor/debugfs.c"], "versions": [{"version": "5.19", "status": "affected"}, {"version": "0", "lessThan": "5.19", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.176", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.140", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.88", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.30", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.7", "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": "5.19", "versionEndExcluding": "6.1.176"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.6.140"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.12.88"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.18.30"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "7.0.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/231b8e1f604f6e0a7e100536f506cdf482e2c5f5"}, {"url": "https://git.kernel.org/stable/c/9a80c458320e0514e11945402dd6e48fcee05524"}, {"url": "https://git.kernel.org/stable/c/ca18c180b053f6ce80394322b314ac721c316af7"}, {"url": "https://git.kernel.org/stable/c/34bdcfb496b29f9a52431194f94473b37fb8c162"}, {"url": "https://git.kernel.org/stable/c/c0b654bc0b76a1da102d9138be1ed1223bd99310"}, {"url": "https://git.kernel.org/stable/c/e47029b977e747cb3a9174308fd55762cce70147"}], "title": "mtd: spi-nor: debugfs: fix out-of-bounds read in spi_nor_params_show()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"x_adpType": "supplier", "providerMetadata": {"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-10-15T01:21:11.983Z"}, "affected": [{"vendor": "Siemens", "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem", "versions": [{"status": "affected", "version": "0", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}], "references": [{"url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"}]}]}}

{}

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On 64-bit systems, this makes the\npassed length 8x larger than intended.\n\nInside spi_nor_print_flags(), the 'names_len' argument is used to\nbounds-check the 'names' array access. An out-of-bounds read occurs\nif a flag bit is set that exceeds the array's actual element count\nbut is within the inflated byte-size count.\n\nCorrect this by using ARRAY_SIZE() to pass the actual number of\nstring pointers in the array."}], "id": "CVE-2026-46190", "lastModified": "2026-10-15T02:19:49.310", "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": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-05-28T10:16:34.640", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/231b8e1f604f6e0a7e100536f506cdf482e2c5f5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/34bdcfb496b29f9a52431194f94473b37fb8c162"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9a80c458320e0514e11945402dd6e48fcee05524"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c0b654bc0b76a1da102d9138be1ed1223bd99310"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ca18c180b053f6ce80394322b314ac721c316af7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e47029b977e747cb3a9174308fd55762cce70147"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: mtd: spi-nor: debugfs: fix out-of-bounds read in spi_nor_params_show()", "id": "2482519", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482519"}, "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-788", "details": ["A flaw was found in the Linux kernel's Memory Technology Device (MTD) SPI-NOR debugfs component. An out-of-bounds read vulnerability exists in the `spi_nor_params_show()` function due to an incorrect calculation of an array's size. This error allows a local attacker to read memory outside of the intended buffer, which could lead to information disclosure or system instability."], "name": "CVE-2026-46190", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "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": "2026-05-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46190\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46190\nhttps://lore.kernel.org/linux-cve-announce/2026052831-CVE-2026-46190-b725@gregkh/T"], "threat_severity": "Moderate"}

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