CVE-2026-43461

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Double-unmap bug: When info DMA mapping failed, the code would\n unmap sfc->daddr inline, then fall through to out_map_data which\n would unmap it again, causing a double-unmap.\n3. Wrong unmap size: The out_map_info label used datalen instead of\n infolen when unmapping sfc->iaddr, which could lead to incorrect\n DMA sync behavior."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable path is reached through local storage I/O to an Amlogic SPI-NAND/SPI-NOR controller via MTD/SPI-mem operations, not through an in-kernel network protocol.\nAC:L - There is no race to win; an attacker who can cause repeated flash reads/writes can exercise the DMA mapping error paths, and uncertainty about inducing mapping failure is resolved toward the higher-severity low-complexity value.\nPR:L - A low-privileged local user can plausibly trigger flash-backed filesystem or MTD read paths on affected embedded systems without kernel capabilities, even though direct raw MTD writes may be further restricted.\nUI:N - Exploitation is initiated by the attacker\u2019s own local I/O and does not require a separate victim action.\nS:U - The impact remains within the kernel and device DMA management security authority; this is not a VM escape or crossing into a different authorization scope.\nC:H - The bad cleanup can double-unmap or over-unmap DMA/IOMMU mappings, plausibly creating stale or overlapping DMA mappings that can expose kernel memory.\nI:H - Corrupt DMA mapping bookkeeping can plausibly allow DMA aliasing or writes into unintended kernel memory, so integrity impact is high under the required higher-severity rule.\nA:H - Invalid, double, or wrong-sized DMA unmaps can trigger warnings, IOMMU/DMA allocator corruption, or crashes/hangs in kernel I/O paths."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/spi/spi-amlogic-spifc-a4.c"], "versions": [{"version": "4670db6f32e9379f5ab6c9bb2a6787cd9b9230a9", "lessThan": "0a83d6c9e149a176340190fa9cbadf2266db4c9a", "status": "affected", "versionType": "git"}, {"version": "4670db6f32e9379f5ab6c9bb2a6787cd9b9230a9", "lessThan": "c0b88f1176074f80140ed77fce909f254b7180ab", "status": "affected", "versionType": "git"}, {"version": "4670db6f32e9379f5ab6c9bb2a6787cd9b9230a9", "lessThan": "b20b437666e1cb26a7c499d1664e8f2a0ac67000", "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/spi/spi-amlogic-spifc-a4.c"], "versions": [{"version": "6.18", "status": "affected"}, {"version": "0", "lessThan": "6.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.19", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.9", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "6.18", "versionEndExcluding": "6.18.19"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "6.19.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0a83d6c9e149a176340190fa9cbadf2266db4c9a"}, {"url": "https://git.kernel.org/stable/c/c0b88f1176074f80140ed77fce909f254b7180ab"}, {"url": "https://git.kernel.org/stable/c/b20b437666e1cb26a7c499d1664e8f2a0ac67000"}], "title": "spi: amlogic: spifc-a4: Fix DMA mapping error handling", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/spi/spi-amlogic-spifc-a4.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "0a83d6c9e149a176340190fa9cbadf2266db4c9a", "status": "affected", "version": "4670db6f32e9379f5ab6c9bb2a6787cd9b9230a9", "versionType": "git"}, {"lessThan": "c0b88f1176074f80140ed77fce909f254b7180ab", "status": "affected", "version": "4670db6f32e9379f5ab6c9bb2a6787cd9b9230a9", "versionType": "git"}, {"lessThan": "b20b437666e1cb26a7c499d1664e8f2a0ac67000", "status": "affected", "version": "4670db6f32e9379f5ab6c9bb2a6787cd9b9230a9", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/spi/spi-amlogic-spifc-a4.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.18"}, {"lessThan": "6.18", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.19", "versionType": "semver"}, {"lessThanOrEqual": "6.19.*", "status": "unaffected", "version": "6.19.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "4B3A7D3C-8D62-43DB-ADD2-83F0634E4C23", "versionEndExcluding": "6.18.19", "versionStartIncluding": "6.18", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E825E7C3-FEAC-4FD3-8A81-78D7387948C9", "versionEndExcluding": "6.19.9", "versionStartIncluding": "6.19", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*", "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: amlogic: spifc-a4: Fix DMA mapping error handling\n\nFix three bugs in aml_sfc_dma_buffer_setup() error paths:\n1. Unnecessary goto: When the first DMA mapping (sfc->daddr) fails,\n nothing needs cleanup. Use direct return instead of goto.\n2. Double-unmap bug: When info DMA mapping failed, the code would\n unmap sfc->daddr inline, then fall through to out_map_data which\n would unmap it again, causing a double-unmap.\n3. Wrong unmap size: The out_map_info label used datalen instead of\n infolen when unmapping sfc->iaddr, which could lead to incorrect\n DMA sync behavior."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nspi: amlogic: spifc-a4: Correcci\u00f3n del manejo de errores de mapeo DMA\n\nCorrige tres errores en las rutas de error de aml_sfc_dma_buffer_setup():\n1. goto innecesario: Cuando el primer mapeo DMA (sfc -> daddr) falla, nada necesita limpieza. Usar retorno directo en lugar de goto.\n2. Error de doble desmapeo: Cuando el mapeo DMA de informaci\u00f3n fallaba, el c\u00f3digo desmapear\u00eda sfc -> daddr en l\u00ednea, luego pasar\u00eda a out_map_data que lo desmapear\u00eda de nuevo, causando un doble desmapeo.\n3. Tama\u00f1o de desmapeo incorrecto: La etiqueta out_map_info us\u00f3 datalen en lugar de infolen al desmapear sfc -> iaddr, lo que podr\u00eda llevar a un comportamiento de sincronizaci\u00f3n DMA incorrecto."}], "id": "CVE-2026-43461", "lastModified": "2026-11-11T20:10:00.273", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-05-08T15:16:58.977", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0a83d6c9e149a176340190fa9cbadf2266db4c9a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b20b437666e1cb26a7c499d1664e8f2a0ac67000"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c0b88f1176074f80140ed77fce909f254b7180ab"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: spi: amlogic: spifc-a4: Fix DMA mapping error handling", "id": "2468210", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2468210"}, "csaw": false, "cwe": "CWE-763", "details": ["A flaw was found in the Linux kernel, specifically within the `spi: amlogic: spifc-a4` module. This vulnerability involves errors in the handling of Direct Memory Access (DMA) mapping within the `aml_sfc_dma_buffer_setup()` function. These errors include a double-unmap bug and an incorrect unmap size, which can lead to improper memory synchronization. An attacker could potentially exploit these memory management issues to cause a system crash, leading to a Denial of Service (DoS)."], "name": "CVE-2026-43461", "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": "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": "2026-05-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43461\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43461\nhttps://lore.kernel.org/linux-cve-announce/2026050801-CVE-2026-43461-908f@gregkh/T"]}

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