CVE-2026-43093

{"id": "CVE-2026-43093", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43093", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:14:34.453140Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "99e3a236dd43d06c65af0a2ef9cb44306aef6e02", "lessThan": "5f123bc278bf4e3283d8606321bebbfd299f4384", "versionType": "git"}, {"status": "affected", "version": "99e3a236dd43d06c65af0a2ef9cb44306aef6e02", "lessThan": "1a6051cd7e3e4c54ff3854a43b638b9292af5e67", "versionType": "git"}, {"status": "affected", "version": "99e3a236dd43d06c65af0a2ef9cb44306aef6e02", "lessThan": "8769708add9eadeea8041a9761771bb715a87104", "versionType": "git"}, {"status": "affected", "version": "99e3a236dd43d06c65af0a2ef9cb44306aef6e02", "lessThan": "a03975beb9f6af0d8ac051e30b2abeabe618414f", "versionType": "git"}, {"status": "affected", "version": "99e3a236dd43d06c65af0a2ef9cb44306aef6e02", "lessThan": "0ec4d3f6e6934deb843b561ae048cd17218e5ad1", "versionType": "git"}, {"status": "affected", "version": "99e3a236dd43d06c65af0a2ef9cb44306aef6e02", "lessThan": "9ea6ba4f3195dcba6e8b3e7b2e748593b7cafb12", "versionType": "git"}, {"status": "affected", "version": "99e3a236dd43d06c65af0a2ef9cb44306aef6e02", "lessThan": "6523bc1b40e69301f24c14338b762af4739d6d39", "versionType": "git"}, {"status": "affected", "version": "99e3a236dd43d06c65af0a2ef9cb44306aef6e02", "lessThan": "a315e022a72d95ef5f1d4e58e903cb492b0ad931", "versionType": "git"}, {"status": "affected", "version": "ad8fb61c184fe0f8d1e0b5b954d010fb9f94a6ee", "versionType": "git"}, {"status": "affected", "version": "25c9cdef57488578da21d99eb614b97ffcf6e59f", "versionType": "git"}, {"status": "affected", "version": "98d3c852e63b49129515dd18c875999efaf8530a", "versionType": "git"}, {"status": "affected", "version": "4.19.118", "lessThan": "4.20", "versionType": "semver"}, {"status": "affected", "version": "5.4.35", "lessThan": "5.5", "versionType": "semver"}, {"status": "affected", "version": "5.6.7", "lessThan": "5.7", "versionType": "semver"}], "programFiles": ["net/xdp/xdp_umem.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.7"}, {"status": "unaffected", "version": "0", "lessThan": "5.7", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.258", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.209", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.175", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.136", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.83", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.24", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.14", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/xdp/xdp_umem.c"], "defaultStatus": "affected"}]}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "affectedData": [{"vendor": "Siemens", "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem", "versions": [{"status": "affected", "version": "0", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}]}], "published": "2026-05-06T10:16:22.667", "references": [{"url": "https://git.kernel.org/stable/c/0ec4d3f6e6934deb843b561ae048cd17218e5ad1", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/1a6051cd7e3e4c54ff3854a43b638b9292af5e67", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/5f123bc278bf4e3283d8606321bebbfd299f4384", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/6523bc1b40e69301f24c14338b762af4739d6d39", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/8769708add9eadeea8041a9761771bb715a87104", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9ea6ba4f3195dcba6e8b3e7b2e748593b7cafb12", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a03975beb9f6af0d8ac051e30b2abeabe618414f", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a315e022a72d95ef5f1d4e58e903cb492b0ad931", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html", "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: tighten UMEM headroom validation to account for tailroom and min frame\n\nThe current headroom validation in xdp_umem_reg() could leave us with\ninsufficient space dedicated to even receive minimum-sized ethernet\nframe. Furthermore if multi-buffer would come to play then\nskb_shared_info stored at the end of XSK frame would be corrupted.\n\nHW typically works with 128-aligned sizes so let us provide this value\nas bare minimum.\n\nMulti-buffer setting is known later in the configuration process so\nbesides accounting for 128 bytes, let us also take care of tailroom space\nupfront."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nxsk: ajustar la validaci\u00f3n del espacio de cabecera de UMEM para tener en cuenta el espacio de cola y el marco m\u00ednimo\n\nLa validaci\u00f3n actual del espacio de cabecera en xdp_umem_reg() podr\u00eda dejarnos con espacio insuficiente dedicado incluso para recibir un marco Ethernet de tama\u00f1o m\u00ednimo. Adem\u00e1s, si el multi-buffer entrara en juego, entonces skb_shared_info almacenado al final del marco XSK se corromper\u00eda.\n\nEl hardware t\u00edpicamente trabaja con tama\u00f1os alineados a 128, as\u00ed que proporcionemos este valor como m\u00ednimo indispensable.\n\nLa configuraci\u00f3n del multi-buffer se conoce m\u00e1s tarde en el proceso de configuraci\u00f3n, as\u00ed que adem\u00e1s de tener en cuenta 128 bytes, ocup\u00e9monos tambi\u00e9n del espacio de cola de antemano."}], "lastModified": "2026-11-11T21:10:00.200", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C1D66A78-E0DD-4D66-9446-03DE28F5FE2F", "versionEndExcluding": "4.20", "versionStartIncluding": "4.19.118"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4ED55BB9-F8CA-4CCD-94DD-BC6F5E60E5D9", "versionEndExcluding": "5.5", "versionStartIncluding": "5.4.35"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "30A44027-1F59-4AF5-B227-86E61A43A865", "versionEndExcluding": "5.7", "versionStartIncluding": "5.6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1D0E985F-975A-4107-B163-94D4DCD5FD9B", "versionEndExcluding": "6.6.136", "versionStartIncluding": "5.7.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7F0AE5B5-23AC-4DCC-B37A-51CA1DAE7BA8", "versionEndExcluding": "6.12.83", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8126B8B8-6D0B-4443-86C1-672AEE893555", "versionEndExcluding": "6.18.24", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D6A8A074-BBF4-4803-ABED-519A839435BB", "versionEndExcluding": "6.19.14", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.7:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3D23CE42-BDB2-4216-8495-230ABE98FCDD"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.7:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2AAE09B2-58C0-42B8-ACDA-578904723270"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.7:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "59EEFC0E-2E5A-4113-A58D-2EE2CC7CFA3B"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.7:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3CC0A9A2-D528-49AA-AB7F-37C5EA7AB76D"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.7:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "512FF86F-0B8C-4DEB-9041-8BD384DD2E58"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.7:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F1AB4A11-C03C-4ABB-B596-0EB3B0F1A8DF"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.7:rc7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9D26AE9C-D49F-4FE9-8A6A-5A7199B7436E"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "58A9FEFF-C040-420D-8F0A-BFDAAA1DF258"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "512EE3A8-A590-4501-9A94-5D4B268D6138"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}