{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64303", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.779Z", "datePublished": "2026-07-25T08:49:38.223Z", "dateUpdated": "2026-08-17T04:53:02.185Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:53:02.185Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: fsl-lpspi: terminate the RX channel on TX prepare failure path\n\nWhen dmaengine_prep_slave_sg() fails for the TX channel, the error path\nterminates the TX DMA channel but leaves the RX channel running. Since\nthe RX channel was already submitted and issued prior to preparing\nthe TX descriptor, returning -EINVAL causes the SPI core to unmap the\nDMA buffers while the RX DMA engine continues writing to them, leading\nto potential memory corruption or use-after-free.\n\nTerminate the RX channel before returning on the TX prepare failure path."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - In a reasonable network-facing deployment, an SPI Ethernet controller such as ENC28J60 receives an unauthenticated remote frame, raises its IRQ, and calls spi_sync(), which traverses the SPI core into the vulnerable fsl-lpspi DMA path.\nAC:L - An attacker can repeatedly drive DMA preparation and influence GFP_NOWAIT allocation pressure with packet flooding; once TX preparation fails after RX issuance, subsequent traffic deterministically exercises the stale RX descriptor without a race to win.\nPR:N - The SPI Ethernet receive IRQ path runs before protocol authentication and has no capability, device-node, or namespace privilege check, so a remote sender needs no privileges.\nUI:N - No victim action is needed after the network interface and SPI NIC are configured; attacker traffic alone invokes the affected transfer path.\nS:U - The stale DMA corrupts memory within the same host kernel security authority and does not inherently cross a VM, IOMMU, or other security scope boundary.\nC:H - The active RX DMA descriptor can write device- and packet-influenced data into unmapped, freed, and reallocated kernel memory, yielding memory corruption that can be leveraged for kernel-memory disclosure.\nI:H - The stale DEV_TO_MEM DMA operation provides attacker-influenced writes into freed or reallocated kernel memory, permitting object corruption and potentially control-flow hijacking or arbitrary kernel code execution.\nA:H - Continued DMA into invalid or repurposed memory can cause an IOMMU fault, kernel oops, panic, or hang, and unauthenticated traffic can trigger the condition repeatedly."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/spi/spi-fsl-lpspi.c"], "versions": [{"version": "09c04466ce7ea494993c0635ba5edb6d2222a806", "lessThan": "ad370d1c7a9a832f77b2341513cd31188c9443af", "status": "affected", "versionType": "git"}, {"version": "09c04466ce7ea494993c0635ba5edb6d2222a806", "lessThan": "cce2063404b2341e7b2bbf85eddfcd70a31a0033", "status": "affected", "versionType": "git"}, {"version": "09c04466ce7ea494993c0635ba5edb6d2222a806", "lessThan": "af39a2698f69b584d14a00cffe0f51a2caa15337", "status": "affected", "versionType": "git"}, {"version": "09c04466ce7ea494993c0635ba5edb6d2222a806", "lessThan": "e65505d91fa036a238968e4c10744244d1b968c4", "status": 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Since\nthe RX channel was already submitted and issued prior to preparing\nthe TX descriptor, returning -EINVAL causes the SPI core to unmap the\nDMA buffers while the RX DMA engine continues writing to them, leading\nto potential memory corruption or use-after-free.\n\nTerminate the RX channel before returning on the TX prepare failure path."}], "id": "CVE-2026-64303", "lastModified": "2026-09-03T16:07:05.237", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-07-25T10:17:11.277", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/01980b5da56e573d62798d0ff6c86bcaa2b22cbe"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/808033d80d5c9f8adf7e8de9317389270ce13430"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9d000bdd250d649a11cd7f733175686877344582"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ad370d1c7a9a832f77b2341513cd31188c9443af"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/af39a2698f69b584d14a00cffe0f51a2caa15337"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cce2063404b2341e7b2bbf85eddfcd70a31a0033"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d5c1060218a3749c8a18b36f8169d910fce20639"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e65505d91fa036a238968e4c10744244d1b968c4"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: spi: fsl-lpspi: terminate the RX channel on TX prepare failure path", "id": "2507222", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507222"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's `fsl-lpspi` driver. This vulnerability occurs when the transmit (TX) Direct Memory Access (DMA) channel fails to prepare, but the receive (RX) DMA channel continues to operate. This can lead to memory corruption or a use-after-free condition, potentially allowing an attacker to compromise system integrity or execute unauthorized code."], "name": "CVE-2026-64303", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64303\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64303\nhttps://lore.kernel.org/linux-cve-announce/2026072507-CVE-2026-64303-7a2d@gregkh/T"], "threat_severity": "Important"}