{"id":"CVE-2026-98073","revision":"0d49a44777ef4dadbe9b2c4ec0a0b093","records":[{"revision":"0d49a44777ef4dadbe9b2c4ec0a0b093","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98073","aliases":[],"title":"net: Remove conflicting altnames for dying netns in __dev_change_net_namespace().","description":"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 \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 ","state":0,"publishedAt":"2026-09-25T10:24:13.277+00:00","modifiedAt":"2026-10-21T12:54:22.672+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/core/dev.c\"\n ],\n \"versions\": [\n {\n \"version\": \"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc\",\n \"lessThan\": \"54772bf503dd0e81e8b8db537fee6946de81e717\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc\",\n \"lessThan\": \"119ac1716705af17fb74b3e33058a938a87eecd4\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc\",\n \"lessThan\": \"a29ea5b5034654aaaa4aadd771f48c01abfd2dfa\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc\",\n \"lessThan\": \"ac6631843269e6a9b2164e393b7f729328711d78\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc\",\n \"lessThan\": \"debac3a20dec524a59625cf10fa2f18571127824\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/core/dev.c\"\n ],\n \"versions\": [\n {\n \"version\": \"5.5\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"5.5\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.160\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.114\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.53\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.2.7\",\n \"lessThanOrEqual\": \"7.2.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.3\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/54772bf503dd0e81e8b8db537fee6946de81e717","https://git.kernel.org/stable/c/119ac1716705af17fb74b3e33058a938a87eecd4","https://git.kernel.org/stable/c/a29ea5b5034654aaaa4aadd771f48c01abfd2dfa","https://git.kernel.org/stable/c/ac6631843269e6a9b2164e393b7f729328711d78","https://git.kernel.org/stable/c/debac3a20dec524a59625cf10fa2f18571127824"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98073","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98073","identifiers":["CVE-2026-98073"]},"retained":false,"historicalAffected":[]}],"coverage":[]}