CVE-2026-31630

{"id": "CVE-2026-31630", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-31630", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:11:18.108954Z"}}], "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": "75b54cb57ca34cbe7a87c6ac757c55360a624590", "lessThan": "386c86412608d3449006a318a662cbcd6ca1f668", "versionType": "git"}, {"status": "affected", "version": "75b54cb57ca34cbe7a87c6ac757c55360a624590", "lessThan": "235b2115de892eab2e107a42efa7a4347baaa80b", "versionType": "git"}, {"status": "affected", "version": "75b54cb57ca34cbe7a87c6ac757c55360a624590", "lessThan": "625af53a1564e31bb2df9adc3739df46137f46c1", "versionType": "git"}, {"status": "affected", "version": "75b54cb57ca34cbe7a87c6ac757c55360a624590", "lessThan": "808a34cdbe8ce336c202d8ea6d5e48496764dc37", "versionType": "git"}, {"status": "affected", "version": "75b54cb57ca34cbe7a87c6ac757c55360a624590", "lessThan": "a6042b8066b24dbcc7945616a157d4d43e463668", "versionType": "git"}, {"status": "affected", "version": "75b54cb57ca34cbe7a87c6ac757c55360a624590", "lessThan": "db297c78ce537c9ac96f0eda9b25ad72c8caefa9", "versionType": "git"}, {"status": "affected", "version": "75b54cb57ca34cbe7a87c6ac757c55360a624590", "lessThan": "10ebed83f9f6414af4e85bc85ffaeda7effdd874", "versionType": "git"}, {"status": "affected", "version": "75b54cb57ca34cbe7a87c6ac757c55360a624590", "lessThan": "a44ce6aa2efb61fe44f2cfab72bb01544bbca272", "versionType": "git"}], "programFiles": ["net/rxrpc/proc.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.9"}, {"status": "unaffected", "version": "0", "lessThan": "4.9", "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": "6.6.160", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.114", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.23", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.13", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/rxrpc/proc.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": "2026-04-24T15:16:42.323", "references": [{"url": "https://git.kernel.org/stable/c/10ebed83f9f6414af4e85bc85ffaeda7effdd874", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/235b2115de892eab2e107a42efa7a4347baaa80b", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/386c86412608d3449006a318a662cbcd6ca1f668", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/625af53a1564e31bb2df9adc3739df46137f46c1", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/808a34cdbe8ce336c202d8ea6d5e48496764dc37", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a44ce6aa2efb61fe44f2cfab72bb01544bbca272", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a6042b8066b24dbcc7945616a157d4d43e463668", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/db297c78ce537c9ac96f0eda9b25ad72c8caefa9", "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-121"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: proc: size address buffers for %pISpc output\n\nThe AF_RXRPC procfs helpers format local and remote socket addresses into\nfixed 50-byte stack buffers with \"%pISpc\".\n\nThat is too small for the longest current-tree IPv6-with-port form the\nformatter can produce. In lib/vsprintf.c, the compressed IPv6 path uses a\ndotted-quad tail not only for v4mapped addresses, but also for ISATAP\naddresses via ipv6_addr_is_isatap().\n\nAs a result, a case such as\n\n [ffff:ffff:ffff:ffff:0:5efe:255.255.255.255]:65535\n\nis possible with the current formatter. That is 50 visible characters, so\n51 bytes including the trailing NUL, which does not fit in the existing\nchar[50] buffers used by net/rxrpc/proc.c.\n\nSize the buffers from the formatter's maximum textual form and switch the\ncall sites to scnprintf().\n\nChanges since v1:\n- correct the changelog to cite the actual maximum current-tree case\n explicitly\n- frame the proof around the ISATAP formatting path instead of the earlier\n mapped-v4 example"}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nrxrpc: proc: dimensionar los b\u00faferes de direcci\u00f3n para la salida %pISpc\n\nLos ayudantes de procfs de AF_RXRPC formatean las direcciones de socket locales y remotas en b\u00faferes de pila fijos de 50 bytes con \u2019%pISpc\u2019.\n\nEso es demasiado peque\u00f1o para la forma m\u00e1s larga de IPv6 con puerto del \u00e1rbol actual que el formateador puede producir. En lib/vsprintf.c, la ruta IPv6 comprimida utiliza una cola de cu\u00e1druple punteado no solo para direcciones mapeadas a v4, sino tambi\u00e9n para direcciones ISATAP a trav\u00e9s de ipv6_addr_is_isatap().\n\nComo resultado, un caso como\n\n [ffff:ffff:ffff:ffff:0:5efe:255.255.255.255]:65535\n\nes posible con el formateador actual. Eso son 50 caracteres visibles, por lo tanto, 51 bytes incluyendo el NUL final, lo cual no cabe en los b\u00faferes char[50] existentes utilizados por net/rxrpc/proc.c.\n\nDimensionar los b\u00faferes a partir de la forma textual m\u00e1xima del formateador y cambiar los sitios de llamada a scnprintf().\n\nCambios desde la v1:\n- corregir el registro de cambios para citar expl\u00edcitamente el caso m\u00e1ximo real del \u00e1rbol actual\n- enmarcar la prueba en torno a la ruta de formateo ISATAP en lugar del ejemplo anterior de v4 mapeado"}], "lastModified": "2026-11-11T23:10:00.263", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "59855615-6720-4D3F-83EB-B5CCFD90FBD3", "versionEndExcluding": "6.18.23", "versionStartIncluding": "4.9.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1490EF9B-9080-481C-8D22-1306AAE664E4", "versionEndExcluding": "6.19.13", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:4.9:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "592761F7-6672-484E-8490-1187F4CDD13E"}, {"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"}