CVE-2026-64234

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Properly release DMA\nchannels and the PCI device reference using a goto ladder if the\nallocation fails."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/tty/serial/pch_uart.c"], "versions": [{"version": "3c6a483275f47a2ef7119309ad3d791c10cf30da", "lessThan": "760df81763b391bb5f0dcb0b7597b736da753ae4", "status": "affected", "versionType": "git"}, {"version": "3c6a483275f47a2ef7119309ad3d791c10cf30da", "lessThan": "5f2e2a240dc1846e049bc67e9c3cdf5b031d08bf", "status": "affected", "versionType": "git"}, {"version": "3c6a483275f47a2ef7119309ad3d791c10cf30da", "lessThan": "daea997bb244aeb50cbb2e5e075fb446a6cf068f", "status": "affected", "versionType": "git"}, {"version": "3c6a483275f47a2ef7119309ad3d791c10cf30da", "lessThan": "6dd5c0ea139b586ad5a091677056dafd405cfe82", "status": "affected", "versionType": "git"}, {"version": "3c6a483275f47a2ef7119309ad3d791c10cf30da", "lessThan": "d846df2dfbc2469a688833b4cc4f8aa80672bde8", "status": "affected", "versionType": "git"}, {"version": "3c6a483275f47a2ef7119309ad3d791c10cf30da", "lessThan": "66f8bfea055b23719b4fd6ce207c44de37d82a59", "status": "affected", "versionType": "git"}, {"version": "3c6a483275f47a2ef7119309ad3d791c10cf30da", "lessThan": "d8d53a343ebe74274ca17b1e1993042e99f8c863", "status": "affected", "versionType": "git"}, {"version": "3c6a483275f47a2ef7119309ad3d791c10cf30da", "lessThan": "6fe472c1bbbe238e91141f7cabc1226e96a60d43", "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/tty/serial/pch_uart.c"], "versions": [{"version": "2.6.38", "status": "affected"}, {"version": "0", "lessThan": "2.6.38", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.259", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.210", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.176", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.93", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.35", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.12", "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": "2.6.38", "versionEndExcluding": "5.10.259"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "5.15.210"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.1.176"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.6.143"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.12.93"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.18.35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "7.0.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/760df81763b391bb5f0dcb0b7597b736da753ae4"}, {"url": "https://git.kernel.org/stable/c/5f2e2a240dc1846e049bc67e9c3cdf5b031d08bf"}, {"url": "https://git.kernel.org/stable/c/daea997bb244aeb50cbb2e5e075fb446a6cf068f"}, {"url": "https://git.kernel.org/stable/c/6dd5c0ea139b586ad5a091677056dafd405cfe82"}, {"url": "https://git.kernel.org/stable/c/d846df2dfbc2469a688833b4cc4f8aa80672bde8"}, {"url": "https://git.kernel.org/stable/c/66f8bfea055b23719b4fd6ce207c44de37d82a59"}, {"url": "https://git.kernel.org/stable/c/d8d53a343ebe74274ca17b1e1993042e99f8c863"}, {"url": "https://git.kernel.org/stable/c/6fe472c1bbbe238e91141f7cabc1226e96a60d43"}], "title": "tty: serial: pch_uart: add check for dma_alloc_coherent()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

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"vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: serial: pch_uart: add check for dma_alloc_coherent()\n\nAdd a check for dma_alloc_coherent() failure to prevent a potential\nNULL pointer dereference in dma_handle_rx(). Properly release DMA\nchannels and the PCI device reference using a goto ladder if the\nallocation fails."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ntty: serial: pch_uart: a\u00f1adir comprobaci\u00f3n para dma_alloc_coherent()\n\nA\u00f1adir una comprobaci\u00f3n para el fallo de dma_alloc_coherent() para prevenir una potencial desreferencia de puntero NULL en dma_handle_rx(). Liberar correctamente los canales DMA y la referencia del dispositivo PCI usando una goto ladder si la asignaci\u00f3n falla."}], "id": "CVE-2026-64234", "lastModified": "2026-11-08T20:10:00.187", "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": "2026-07-24T16:16:52.610", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5f2e2a240dc1846e049bc67e9c3cdf5b031d08bf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/66f8bfea055b23719b4fd6ce207c44de37d82a59"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6dd5c0ea139b586ad5a091677056dafd405cfe82"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6fe472c1bbbe238e91141f7cabc1226e96a60d43"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/760df81763b391bb5f0dcb0b7597b736da753ae4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d846df2dfbc2469a688833b4cc4f8aa80672bde8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d8d53a343ebe74274ca17b1e1993042e99f8c863"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/daea997bb244aeb50cbb2e5e075fb446a6cf068f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: tty: serial: pch_uart: add check for dma_alloc_coherent()", "id": "2506828", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2506828"}, "csaw": false, "cwe": "CWE-476", "details": ["A flaw was found in the Linux kernel's `tty` subsystem, specifically within the `pch_uart` serial driver. This vulnerability occurs due to a missing check for the return value of `dma_alloc_coherent()`. An attacker could potentially exploit this to trigger a NULL pointer dereference in the `dma_handle_rx()` function, leading to a system crash and a Denial of Service (DoS)."], "name": "CVE-2026-64234", "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": "2026-07-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64234\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64234\nhttps://lore.kernel.org/linux-cve-announce/2026072440-CVE-2026-64234-ce43@gregkh/T"]}

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