CVE-2026-23026

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The function directly assigns NULL to gchan->config, losing the\n reference to the original memory\n4. The original memory becomes unreachable and cannot be freed\n\nFix this by using a temporary variable to hold the krealloc() result\nand only updating gchan->config when the allocation succeeds.\n\nFound via static analysis and code review."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/dma/qcom/gpi.c"], "versions": [{"version": "5d0c3533a19f48e5e7e73806a3e4b29cd4364130", "lessThan": "4532f18e4ab36def1f55cd936d0fc002b2ce34c2", "status": "affected", "versionType": "git"}, {"version": "5d0c3533a19f48e5e7e73806a3e4b29cd4364130", "lessThan": "694ab1f6f16cb69f7c5ef2452b22ba7b00a3c7c7", "status": "affected", "versionType": "git"}, {"version": "5d0c3533a19f48e5e7e73806a3e4b29cd4364130", "lessThan": "6bf4ef078fd11910988889a6c0b3698d2e0c89af", "status": "affected", "versionType": "git"}, {"version": "5d0c3533a19f48e5e7e73806a3e4b29cd4364130", "lessThan": 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"bippy-1.2.0"}}, "adp": [{"x_adpType": "supplier", "providerMetadata": {"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-11-10T12:41:23.370Z"}, "affected": [{"vendor": "Siemens", "product": "RUGGEDCOM RST2428P (6GK6242-6PA00)", "versions": [{"status": "affected", "version": "0", "lessThan": "V4.0", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)", "versions": [{"status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)", "versions": [{"status": "affected", "version": "V3.1.7", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)", "versions": [{"status": "affected", "version": 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{}

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The function directly assigns NULL to gchan->config, losing the\n reference to the original memory\n4. The original memory becomes unreachable and cannot be freed\n\nFix this by using a temporary variable to hold the krealloc() result\nand only updating gchan->config when the allocation succeeds.\n\nFound via static analysis and code review."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndmaengine: qcom: gpi: Correcci\u00f3n de fuga de memoria en gpi_peripheral_config()\n\nCorrige una fuga de memoria en gpi_peripheral_config() donde la memoria original apuntada por gchan->config podr\u00eda perderse si krealloc() falla.\n\nEl problema ocurre cuando:\n1. gchan->config apunta a memoria previamente asignada\n2. krealloc() falla y devuelve NULL\n3. La funci\u00f3n asigna directamente NULL a gchan->config, perdiendo la referencia a la memoria original\n4. La memoria original se vuelve inalcanzable y no puede ser liberada\n\nCorrige esto utilizando una variable temporal para contener el resultado de krealloc() y actualizando gchan->config solo cuando la asignaci\u00f3n tiene \u00e9xito.\n\nEncontrado mediante an\u00e1lisis est\u00e1tico y revisi\u00f3n de c\u00f3digo."}], "id": "CVE-2026-23026", "lastModified": "2026-11-10T13:18:33.373", "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": "2026-01-31T12:16:05.920", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/01b1d781394fc9b83015e3a3cd46b17bda842bd8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3f747004bbd641131d9396d87b5d2d3d1e182728"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4532f18e4ab36def1f55cd936d0fc002b2ce34c2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/55a67ba5ac4cebfd54cc8305d4d57a0f1dfe6a85"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/694ab1f6f16cb69f7c5ef2452b22ba7b00a3c7c7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6bf4ef078fd11910988889a6c0b3698d2e0c89af"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-253495.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: dmaengine: qcom: gpi: Fix memory leak in gpi_peripheral_config()", "id": "2435656", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2435656"}, "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"}, "details": ["No description is available for this CVE."], "name": "CVE-2026-23026", "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": "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": "2026-01-31T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-23026\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-23026\nhttps://lore.kernel.org/linux-cve-announce/2026013119-CVE-2026-23026-5ca7@gregkh/T"], "threat_severity": "Moderate"}

{"analysis": {"en": {"generated_at": "2026-04-18T00:55:51.421432+00:00", "value": {"mitigation_remediation": ["Update the kernel to a version that includes the commit that fixes gpi_peripheral_config memory leak.", "If an immediate kernel upgrade is not feasible, recompile the affected driver applying the temporary variable patch so that gchan->config is only updated on successful allocation.", "Monitor kernel memory usage and logs for signs of frequent allocation failures or increased memory pressure, and consider disabling unused QCOM GPI peripherals to reduce the risk of repeated leaks."], "summary": {"action": "Apply Patch", "impact": "Memory Leak Leading to Potential Denial of Service"}, "threat_synthesis": {"affected_systems": "The vulnerability exists in all Linux kernel builds that include the affected driver code, specifically kernels 5.11 through 6.19 (including all release candidates) and any future releases that have not yet integrated the fix. As the product is part of the Linux kernel itself, any distribution using these kernel versions without the patch is impacted.", "description_and_impact": "In the Linux kernel, the function gpi_peripheral_config() in the qcom GPI DMA engine driver contains a memory leak that occurs when a reallocation fails. The function overwrites the original configuration pointer with NULL, causing the previously allocated memory to become unreachable and unrecoverable. This flaw can gradually increase kernel memory usage and eventually destabilize the system, resulting in a denial\u2011of\u2011service scenario if the leak is triggered repeatedly. The weakness is a classic unbounded memory leak (CWE\u2011401).", "risk_and_exploitability": "The CVSS score is 5.5, indicating a moderate severity. The EPSS score is less than 1%, reflecting a very low probability of exploitation in the current environment, and the vulnerability is not listed in the CISA KEV catalog. The description does not specify a remote attack vector; it is inferred that the exploit requires local access to influence driver configuration operations, such as repeated peripheral initializations or injection of allocation failures. If an attacker can trigger sufficient allocations and failures, they could force continuous memory growth, eventually leading to kernel crash or service disruption."}}}}, "created": "2026-04-18T01:00:11.630436+00:00", "updated": "2026-04-18T01:00:11.630450+00:00", "vendors": []}