CVE-2022-49339

{"id": "CVE-2022-49339", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2025-02-26T07:01:10.657", "references": [{"url": "https://git.kernel.org/stable/c/1084716f76c8045eadf92a9d9a62641f3c8d8c90", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/317260b3eb6384a05a8af212308fa50f3b2e8290", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/3e6de5037148c5a93a436b1e8d2edad3dac11755", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/5801f064e35181c71857a80ff18af4dbec3c5f5c", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/5d9c1b081ad28c852a97e10dd75412546497694a", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/64aef8efe96c1616142c4476a05731306fc4494e", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9ba4416b831eeb4d185e88e73488d1d21288e63a", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ab8b2c2de273ec1d698a18e399896a6febb5cda0", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ipv6: unexport __init-annotated seg6_hmac_init()\n\nEXPORT_SYMBOL and __init is a bad combination because the .init.text\nsection is freed up after the initialization. Hence, modules cannot\nuse symbols annotated __init. The access to a freed symbol may end up\nwith kernel panic.\n\nmodpost used to detect it, but it has been broken for a decade.\n\nRecently, I fixed modpost so it started to warn it again, then this\nshowed up in linux-next builds.\n\nThere are two ways to fix it:\n\n - Remove __init\n - Remove EXPORT_SYMBOL\n\nI chose the latter for this case because the caller (net/ipv6/seg6.c)\nand the callee (net/ipv6/seg6_hmac.c) belong to the same module.\nIt seems an internal function call in ipv6.ko."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: ipv6: unexport __init-annotated seg6_hmac_init() EXPORT_SYMBOL y __init es una mala combinaci\u00f3n porque la secci\u00f3n .init.text se libera despu\u00e9s de la inicializaci\u00f3n. Por lo tanto, los m\u00f3dulos no pueden usar s\u00edmbolos anotados __init. El acceso a un s\u00edmbolo liberado puede terminar con un p\u00e1nico del kernel. modpost sol\u00eda detectarlo, pero ha estado roto durante una d\u00e9cada. Recientemente, arregl\u00e9 modpost para que comenzara a advertirlo nuevamente, luego esto apareci\u00f3 en las compilaciones de linux-next. Hay dos formas de solucionarlo: - Eliminar __init - Eliminar EXPORT_SYMBOL Eleg\u00ed esto \u00faltimo para este caso porque el llamador (net/ipv6/seg6.c) y el llamador (net/ipv6/seg6_hmac.c) pertenecen al mismo m\u00f3dulo. Parece una llamada de funci\u00f3n interna en ipv6.ko."}], "lastModified": "2025-09-22T20:26:28.693", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D6823775-2653-4644-A0D4-4E6E68F10C65", "versionEndExcluding": "4.14.283", "versionStartIncluding": "4.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B8CFA0F4-2D75-41F4-9753-87944A08B53B", "versionEndExcluding": "4.19.247", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3EC49633-14DE-4EBD-BB80-76AE2E3EABB9", "versionEndExcluding": "5.4.198", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1B42AA01-44D8-4572-95E6-FF8E374CF9C5", "versionEndExcluding": "5.10.122", "versionStartIncluding": "5.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FC042EE3-4864-4325-BE0B-4BCDBF11AA61", "versionEndExcluding": "5.15.47", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "53E7AA2E-2FB4-45CA-A22B-08B4EDBB51AD", "versionEndExcluding": "5.17.15", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FA6D643C-6D6A-4821-8A8D-B5776B8F0103", "versionEndExcluding": "5.18.4", "versionStartIncluding": "5.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A8C30C2D-F82D-4D37-AB48-D76ABFBD5377"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}