{"id":"CVE-2022-49339","title":"net: ipv6: unexport __init-annotated seg6_hmac_init()","summary":"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…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= bf355b8d2c30a289232042cacc1cfaea4923936c < 64aef8efe96c1616142c4476a05731306fc4494e","Linux >= bf355b8d2c30a289232042cacc1cfaea4923936c < ab8b2c2de273ec1d698a18e399896a6febb5cda0","Linux >= bf355b8d2c30a289232042cacc1cfaea4923936c < 317260b3eb6384a05a8af212308fa50f3b2e8290","Linux >= bf355b8d2c30a289232042cacc1cfaea4923936c < 5d9c1b081ad28c852a97e10dd75412546497694a","Linux >= bf355b8d2c30a289232042cacc1cfaea4923936c < 1084716f76c8045eadf92a9d9a62641f3c8d8c90","Linux >= bf355b8d2c30a289232042cacc1cfaea4923936c < 3e6de5037148c5a93a436b1e8d2edad3dac11755","Linux >= bf355b8d2c30a289232042cacc1cfaea4923936c < 9ba4416b831eeb4d185e88e73488d1d21288e63a","Linux >= bf355b8d2c30a289232042cacc1cfaea4923936c < 5801f064e35181c71857a80ff18af4dbec3c5f5c","Linux 4.10"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T19:45:11.321766Z"},"published":"2025-02-26","updated":"2026-11-05","sourceUpdated":"2026-11-05T19:49:38.690Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2022-49339","references":[{"url":"https://git.kernel.org/stable/c/64aef8efe96c1616142c4476a05731306fc4494e"},{"url":"https://git.kernel.org/stable/c/ab8b2c2de273ec1d698a18e399896a6febb5cda0"},{"url":"https://git.kernel.org/stable/c/317260b3eb6384a05a8af212308fa50f3b2e8290"},{"url":"https://git.kernel.org/stable/c/5d9c1b081ad28c852a97e10dd75412546497694a"},{"url":"https://git.kernel.org/stable/c/1084716f76c8045eadf92a9d9a62641f3c8d8c90"},{"url":"https://git.kernel.org/stable/c/3e6de5037148c5a93a436b1e8d2edad3dac11755"},{"url":"https://git.kernel.org/stable/c/9ba4416b831eeb4d185e88e73488d1d21288e63a"},{"url":"https://git.kernel.org/stable/c/5801f064e35181c71857a80ff18af4dbec3c5f5c"}],"tags":["cve.org"],"epss":0.00277,"epssPercentile":0.2024,"ingestedAt":"2026-11-05T22:38:31.572Z","slug":"CVE-2022-49339","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= bf355b8d2c30a289232042cacc1cfaea4923936c < 64aef8efe96c1616142c4476a05731306fc4494e`\n- `Linux >= bf355b8d2c30a289232042cacc1cfaea4923936c < ab8b2c2de273ec1d698a18e399896a6febb5cda0`\n- `Linux >= bf355b8d2c30a289232042cacc1cfaea4923936c < 317260b3eb6384a05a8af212308fa50f3b2e8290`\n- `Linux >= bf355b8d2c30a289232042cacc1cfaea4923936c < 5d9c1b081ad28c852a97e10dd75412546497694a`\n- `Linux >= bf355b8d2c30a289232042cacc1cfaea4923936c < 1084716f76c8045eadf92a9d9a62641f3c8d8c90`\n- `Linux >= bf355b8d2c30a289232042cacc1cfaea4923936c < 3e6de5037148c5a93a436b1e8d2edad3dac11755`\n- `Linux >= bf355b8d2c30a289232042cacc1cfaea4923936c < 9ba4416b831eeb4d185e88e73488d1d21288e63a`\n- `Linux >= bf355b8d2c30a289232042cacc1cfaea4923936c < 5801f064e35181c71857a80ff18af4dbec3c5f5c`\n- `Linux 4.10`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}