{"id":"CVE-2022-49339","summary":"net: ipv6: unexport __init-annotated seg6_hmac_init()","details":"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.","modified":"2026-04-02T08:27:30.739461Z","published":"2025-02-26T02:10:56.704Z","related":["SUSE-SU-2025:1027-1","SUSE-SU-2025:1176-1","SUSE-SU-2025:1183-1","SUSE-SU-2025:1241-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49339.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1084716f76c8045eadf92a9d9a62641f3c8d8c90"},{"type":"WEB","url":"https://git.kernel.org/stable/c/317260b3eb6384a05a8af212308fa50f3b2e8290"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3e6de5037148c5a93a436b1e8d2edad3dac11755"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5801f064e35181c71857a80ff18af4dbec3c5f5c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5d9c1b081ad28c852a97e10dd75412546497694a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/64aef8efe96c1616142c4476a05731306fc4494e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9ba4416b831eeb4d185e88e73488d1d21288e63a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ab8b2c2de273ec1d698a18e399896a6febb5cda0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49339.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49339"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"bf355b8d2c30a289232042cacc1cfaea4923936c"},{"fixed":"64aef8efe96c1616142c4476a05731306fc4494e"},{"fixed":"ab8b2c2de273ec1d698a18e399896a6febb5cda0"},{"fixed":"317260b3eb6384a05a8af212308fa50f3b2e8290"},{"fixed":"5d9c1b081ad28c852a97e10dd75412546497694a"},{"fixed":"1084716f76c8045eadf92a9d9a62641f3c8d8c90"},{"fixed":"3e6de5037148c5a93a436b1e8d2edad3dac11755"},{"fixed":"9ba4416b831eeb4d185e88e73488d1d21288e63a"},{"fixed":"5801f064e35181c71857a80ff18af4dbec3c5f5c"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49339.json"}}],"schema_version":"1.7.5"}