{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53138","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-05-02T15:51:43.562Z","datePublished":"2025-05-02T15:56:10.372Z","dateUpdated":"2026-05-11T19:39:10.829Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T19:39:10.829Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: caif: Fix use-after-free in cfusbl_device_notify()\n\nsyzbot reported use-after-free in cfusbl_device_notify() [1].  This\ncauses a stack trace like below:\n\nBUG: KASAN: use-after-free in cfusbl_device_notify+0x7c9/0x870 net/caif/caif_usb.c:138\nRead of size 8 at addr ffff88807ac4e6f0 by task kworker/u4:6/1214\n\nCPU: 0 PID: 1214 Comm: kworker/u4:6 Not tainted 5.19.0-rc3-syzkaller-00146-g92f20ff72066 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\nWorkqueue: netns cleanup_net\nCall Trace:\n <TASK>\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\n print_address_description.constprop.0.cold+0xeb/0x467 mm/kasan/report.c:313\n print_report mm/kasan/report.c:429 [inline]\n kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491\n cfusbl_device_notify+0x7c9/0x870 net/caif/caif_usb.c:138\n notifier_call_chain+0xb5/0x200 kernel/notifier.c:87\n call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1945\n call_netdevice_notifiers_extack net/core/dev.c:1983 [inline]\n call_netdevice_notifiers net/core/dev.c:1997 [inline]\n netdev_wait_allrefs_any net/core/dev.c:10227 [inline]\n netdev_run_todo+0xbc0/0x10f0 net/core/dev.c:10341\n default_device_exit_batch+0x44e/0x590 net/core/dev.c:11334\n ops_exit_list+0x125/0x170 net/core/net_namespace.c:167\n cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:594\n process_one_work+0x996/0x1610 kernel/workqueue.c:2289\n worker_thread+0x665/0x1080 kernel/workqueue.c:2436\n kthread+0x2e9/0x3a0 kernel/kthread.c:376\n ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302\n </TASK>\n\nWhen unregistering a net device, unregister_netdevice_many_notify()\nsets the device's reg_state to NETREG_UNREGISTERING, calls notifiers\nwith NETDEV_UNREGISTER, and adds the device to the todo list.\n\nLater on, devices in the todo list are processed by netdev_run_todo().\nnetdev_run_todo() waits devices' reference count become 1 while\nrebdoadcasting NETDEV_UNREGISTER notification.\n\nWhen cfusbl_device_notify() is called with NETDEV_UNREGISTER multiple\ntimes, the parent device might be freed.  This could cause UAF.\nProcessing NETDEV_UNREGISTER multiple times also causes inbalance of\nreference count for the module.\n\nThis patch fixes the issue by accepting only first NETDEV_UNREGISTER\nnotification."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/caif/caif_usb.c"],"versions":[{"version":"7ad65bf68d705b445ef10b77ab50dab22be185ee","lessThan":"68a45c3cf0e2242a533657f4f535d9b6a7447a79","status":"affected","versionType":"git"},{"version":"7ad65bf68d705b445ef10b77ab50dab22be185ee","lessThan":"1793da97a23e31c5bf06631f3f3e5a25f368fd64","status":"affected","versionType":"git"},{"version":"7ad65bf68d705b445ef10b77ab50dab22be185ee","lessThan":"9dc16be373b382ddd4c274052a6e870a95e76c01","status":"affected","versionType":"git"},{"version":"7ad65bf68d705b445ef10b77ab50dab22be185ee","lessThan":"c3aaec463a632cf4187dc017e421bfa69d7834a9","status":"affected","versionType":"git"},{"version":"7ad65bf68d705b445ef10b77ab50dab22be185ee","lessThan":"3f14457e1584224f4296af613bbd99deb60b5d91","status":"affected","versionType":"git"},{"version":"7ad65bf68d705b445ef10b77ab50dab22be185ee","lessThan":"287027d8a567168a5d8ce5cb0cba16a34791a48c","status":"affected","versionType":"git"},{"version":"7ad65bf68d705b445ef10b77ab50dab22be185ee","lessThan":"d1a11bbdbb5ea9f172019c5a4a3e9d8eabd72179","status":"affected","versionType":"git"},{"version":"7ad65bf68d705b445ef10b77ab50dab22be185ee","lessThan":"9781e98a97110f5e76999058368b4be76a788484","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/caif/caif_usb.c"],"versions":[{"version":"3.3","status":"affected"},{"version":"0","lessThan":"3.3","status":"unaffected","versionType":"semver"},{"version":"4.14.310","lessThanOrEqual":"4.14.*","status":"unaffected","versionType":"semver"},{"version":"4.19.278","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.237","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.175","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.103","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.20","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.2.7","lessThanOrEqual":"6.2.*","status":"unaffected","versionType":"semver"},{"version":"6.3","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":"3.3","versionEndExcluding":"4.14.310"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.3","versionEndExcluding":"4.19.278"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.3","versionEndExcluding":"5.4.237"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.3","versionEndExcluding":"5.10.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.3","versionEndExcluding":"5.15.103"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.3","versionEndExcluding":"6.1.20"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.3","versionEndExcluding":"6.2.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.3","versionEndExcluding":"6.3"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/68a45c3cf0e2242a533657f4f535d9b6a7447a79"},{"url":"https://git.kernel.org/stable/c/1793da97a23e31c5bf06631f3f3e5a25f368fd64"},{"url":"https://git.kernel.org/stable/c/9dc16be373b382ddd4c274052a6e870a95e76c01"},{"url":"https://git.kernel.org/stable/c/c3aaec463a632cf4187dc017e421bfa69d7834a9"},{"url":"https://git.kernel.org/stable/c/3f14457e1584224f4296af613bbd99deb60b5d91"},{"url":"https://git.kernel.org/stable/c/287027d8a567168a5d8ce5cb0cba16a34791a48c"},{"url":"https://git.kernel.org/stable/c/d1a11bbdbb5ea9f172019c5a4a3e9d8eabd72179"},{"url":"https://git.kernel.org/stable/c/9781e98a97110f5e76999058368b4be76a788484"}],"title":"net: caif: Fix use-after-free in cfusbl_device_notify()","x_generator":{"engine":"bippy-1.2.0"}}}}