{"schema":"threatline.record/2","record":{"id":"CVE-2026-98073","aliases":[],"summary":"net: Remove conflicting altnames for dying netns in __dev_change_net_namespace().","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: Remove conflicting altnames for dying netns in __dev_change_net_namespace().\n\nsyzbot reported the warning in cfg80211_pernet_exit(). [0]\n\nThe repro does the following:\n\n  1. create two device in root netns and non-root netns\n  2. assign the same altname for the two devices\n  3. remove the non-root netns\n\nSince commit 7663d522099e (\"net: check for altname conflicts\nwhen changing netdev's netns\"), cfg80211_switch_netns() and\ncfg802154_switch_netns() fail if init_net has a device with the\nconflicting altname.\n\ndefault_device_exit_net() had the same issue and commit d09486a04f5d\n(\"net: fix removing a namespace with conflicting altnames\") fixed it.\n\ncfg80211_pernet_exit() and cfg802154_pernet_exit() need the same fix.\n\nLet's generalise the fix by removing conflicting altnames for dying\nnetns in __dev_change_net_namespace().\n\n[0]:\ncfg80211_switch_netns(rdev, &init_net)\nWARNING: net/wireless/core.c:1871 at cfg80211_pernet_exit+0xd5/0x120 net/wireless/core.c:1871, CPU#1: kworker/u8:9/1160\nModules linked in:\nCPU: 1 UID: 0 PID: 1160 Comm: kworker/u8:9 Not tainted syzkaller #0 PREEMPT(full)\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026\nWorkqueue: netns cleanup_net\nRIP: 0010:cfg80211_pernet_exit+0xd5/0x120 net/wireless/core.c:1871\nCode: e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 b4 ef 0e f7 4d 8b 36 49 81 fe 20 10 4a 90 74 12 e8 03 3d 9f f6 eb 85 e8 fc 3c 9f f6 90 <0f> 0b 90 eb cc e8 f1 3c 9f f6 eb 05 e8 ea 3c 9f f6 5b 41 5c 41 5e\nRSP: 0018:ffffc900057a78f0 EFLAGS: 00010293\nRAX: ffffffff8b287154 RBX: ffff88807ba72780 RCX: ffff8880213e8000\nRDX: 0000000000000000 RSI: 00000000ffffffef RDI: 0000000000000000\nRBP: 00000000ffffffef R08: ffffffff9024cc67 R09: 0000000000000000\nR10: fffff52000af4eb0 R11: fffffbfff204998d R12: dffffc0000000000\nR13: ffffffff904a1080 R14: ffff888144ed0008 R15: ffff888144ed0e20\nFS:  0000000000000000(0000) GS:ffff888124de6000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00005642de0a8a70 CR3: 000000007a40c000 CR4: 00000000003526f0\nCall Trace:\n <TASK>\n ops_exit_list net/core/net_namespace.c:200 [inline]\n ops_undo_list+0x43d/0x8d0 net/core/net_namespace.c:253\n cleanup_net+0x572/0x810 net/core/net_namespace.c:706\n process_one_work kernel/workqueue.c:3387 [inline]\n process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3470\n worker_thread+0xa47/0xfb0 kernel/workqueue.c:3551\n kthread+0x38b/0x480 kernel/kthread.c:436\n ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245\n </TASK>","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98073","source_modified_at":"2026-10-21T12:54:22.672Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc","lessThan":"54772bf503dd0e81e8b8db537fee6946de81e717","status":"affected","versionType":"git"},{"version":"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc","lessThan":"119ac1716705af17fb74b3e33058a938a87eecd4","status":"affected","versionType":"git"},{"version":"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc","lessThan":"a29ea5b5034654aaaa4aadd771f48c01abfd2dfa","status":"affected","versionType":"git"},{"version":"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc","lessThan":"ac6631843269e6a9b2164e393b7f729328711d78","status":"affected","versionType":"git"},{"version":"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc","lessThan":"debac3a20dec524a59625cf10fa2f18571127824","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98073","source_modified_at":"2026-10-21T12:54:22.672Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"5.5","status":"affected"},{"version":"0","lessThan":"5.5","status":"unaffected","versionType":"semver"},{"version":"6.6.160","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.114","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.53","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.7","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98073","source_modified_at":"2026-10-21T12:54:22.672Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"54772bf503dd0e81e8b8db537fee6946de81e717","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98073","source_modified_at":"2026-10-21T12:54:22.672Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"119ac1716705af17fb74b3e33058a938a87eecd4","basis":"first unaffected version stated in the CVE record"}],"cvss":7.8,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00163,"percentile":0.05234,"score_date":"2026-10-23"},"published_at":"2026-09-25T10:24:13.277Z","modified_at":"2026-10-21T12:54:22.672Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98073","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-21T12:54:22.672Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98073","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/54772bf503dd0e81e8b8db537fee6946de81e717"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/119ac1716705af17fb74b3e33058a938a87eecd4"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/a29ea5b5034654aaaa4aadd771f48c01abfd2dfa"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/ac6631843269e6a9b2164e393b7f729328711d78"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/debac3a20dec524a59625cf10fa2f18571127824"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-21T12:54:22.672Z","content_hash":"054160af2ccb64988bbfbd965e335fcfbf8f55bd6131889c13aa276b358f6e77"}}