{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-98073", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:19:56.074Z", "datePublished": "2026-09-25T10:24:13.277Z", "dateUpdated": "2026-10-21T12:54:22.672Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:54:22.672Z" }, "descriptions": [ { "lang": "en", "value": "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 " } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - Triggered locally. A user sets an altname on a wlan netdev with RTM_NEWLINKPROP, then lets its netns die. cleanup_net runs cfg80211_pernet_exit -> cfg80211_switch_netns -> dev_change_net_namespace, and __dev_change_net_namespace returns -EEXIST on the altname conflict. No remote peer supplies any data.\nAC:L - Wait\nPR:L - Wait\nUI:N - Wait\nS:U - Wait\nC:H - Wait\nI:H - Wait\nA:H - Wait" } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/core/dev.c" ], "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" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/core/dev.c" ], "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" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.6.160" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.12.114" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.18.53" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "7.2.7" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/54772bf503dd0e81e8b8db537fee6946de81e717" }, { "url": "https://git.kernel.org/stable/c/119ac1716705af17fb74b3e33058a938a87eecd4" }, { "url": "https://git.kernel.org/stable/c/a29ea5b5034654aaaa4aadd771f48c01abfd2dfa" }, { "url": "https://git.kernel.org/stable/c/ac6631843269e6a9b2164e393b7f729328711d78" }, { "url": "https://git.kernel.org/stable/c/debac3a20dec524a59625cf10fa2f18571127824" } ], "title": "net: Remove conflicting altnames for dying netns in __dev_change_net_namespace().", "x_generator": { "engine": "bippy-1.2.0" } } } }