CVE-2026-43149

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{}

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"versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67", "versionEndExcluding": "6.19.6", "versionStartIncluding": "6.19", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: wan/fsl_ucc_hdlc: Fix dma_free_coherent() in uhdlc_memclean()\n\nThe priv->rx_buffer and priv->tx_buffer are alloc'd together as\ncontiguous buffers in uhdlc_init() but freed as two buffers in\nuhdlc_memclean().\n\nChange the cleanup to only call dma_free_coherent() once on the whole\nbuffer."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet: wan/fsl_ucc_hdlc: Correcci\u00f3n de dma_free_coherent() en uhdlc_memclean()\n\nLos priv -> rx_buffer y priv -> tx_buffer se asignan juntos como b\u00faferes contiguos en uhdlc_init() pero se liberan como dos b\u00faferes en uhdlc_memclean().\n\nCambiar la limpieza para llamar a dma_free_coherent() solo una vez en todo el b\u00fafer."}], "id": "CVE-2026-43149", "lastModified": "2026-11-11T21:10:00.200", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-05-06T12:16:32.553", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/011ae5dd84dc9f05eb9b8e1adff44252ac776e7b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": 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{"bugzilla": {"description": "kernel: net: wan/fsl_ucc_hdlc: Fix dma_free_coherent() in uhdlc_memclean()", "id": "2467106", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467106"}, "csaw": false, "cwe": "CWE-1341", "details": ["A flaw was found in the Linux kernel's `fsl_ucc_hdlc` module. The `uhdlc_memclean()` function incorrectly deallocates memory by calling `dma_free_coherent()` twice for buffers that were allocated as a single contiguous block. This improper memory handling may lead to a denial of service (DoS) or other unpredictable system behavior due to memory corruption."], "name": "CVE-2026-43149", "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": "2026-05-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43149\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43149\nhttps://lore.kernel.org/linux-cve-announce/2026050627-CVE-2026-43149-cd24@gregkh/T"]}

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