{"id":"CVE-2022-50163","summary":"ax25: fix incorrect dev_tracker usage","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nax25: fix incorrect dev_tracker usage\n\nWhile investigating a separate rose issue [1], and enabling\nCONFIG_NET_DEV_REFCNT_TRACKER=y, Bernard reported an orthogonal ax25 issue [2]\n\nAn ax25_dev can be used by one (or many) struct ax25_cb.\nWe thus need different dev_tracker, one per struct ax25_cb.\n\nAfter this patch is applied, we are able to focus on rose.\n\n[1] https://lore.kernel.org/netdev/fb7544a1-f42e-9254-18cc-c9b071f4ca70@free.fr/\n\n[2]\n[  205.798723] reference already released.\n[  205.798732] allocated in:\n[  205.798734]  ax25_bind+0x1a2/0x230 [ax25]\n[  205.798747]  __sys_bind+0xea/0x110\n[  205.798753]  __x64_sys_bind+0x18/0x20\n[  205.798758]  do_syscall_64+0x5c/0x80\n[  205.798763]  entry_SYSCALL_64_after_hwframe+0x44/0xae\n[  205.798768] freed in:\n[  205.798770]  ax25_release+0x115/0x370 [ax25]\n[  205.798778]  __sock_release+0x42/0xb0\n[  205.798782]  sock_close+0x15/0x20\n[  205.798785]  __fput+0x9f/0x260\n[  205.798789]  ____fput+0xe/0x10\n[  205.798792]  task_work_run+0x64/0xa0\n[  205.798798]  exit_to_user_mode_prepare+0x18b/0x190\n[  205.798804]  syscall_exit_to_user_mode+0x26/0x40\n[  205.798808]  do_syscall_64+0x69/0x80\n[  205.798812]  entry_SYSCALL_64_after_hwframe+0x44/0xae\n[  205.798827] ------------[ cut here ]------------\n[  205.798829] WARNING: CPU: 2 PID: 2605 at lib/ref_tracker.c:136 ref_tracker_free.cold+0x60/0x81\n[  205.798837] Modules linked in: rose netrom mkiss ax25 rfcomm cmac algif_hash algif_skcipher af_alg bnep snd_hda_codec_hdmi nls_iso8859_1 i915 rtw88_8821ce rtw88_8821c x86_pkg_temp_thermal rtw88_pci intel_powerclamp rtw88_core snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio coretemp snd_hda_intel kvm_intel snd_intel_dspcfg mac80211 snd_hda_codec kvm i2c_algo_bit drm_buddy drm_dp_helper btusb drm_kms_helper snd_hwdep btrtl snd_hda_core btbcm joydev crct10dif_pclmul btintel crc32_pclmul ghash_clmulni_intel mei_hdcp btmtk intel_rapl_msr aesni_intel bluetooth input_leds snd_pcm crypto_simd syscopyarea processor_thermal_device_pci_legacy sysfillrect cryptd intel_soc_dts_iosf snd_seq sysimgblt ecdh_generic fb_sys_fops rapl libarc4 processor_thermal_device intel_cstate processor_thermal_rfim cec snd_timer ecc snd_seq_device cfg80211 processor_thermal_mbox mei_me processor_thermal_rapl mei rc_core at24 snd intel_pch_thermal intel_rapl_common ttm soundcore int340x_thermal_zone video\n[  205.798948]  mac_hid acpi_pad sch_fq_codel ipmi_devintf ipmi_msghandler drm msr parport_pc ppdev lp parport ramoops pstore_blk reed_solomon pstore_zone efi_pstore ip_tables x_tables autofs4 hid_generic usbhid hid i2c_i801 i2c_smbus r8169 xhci_pci ahci libahci realtek lpc_ich xhci_pci_renesas [last unloaded: ax25]\n[  205.798992] CPU: 2 PID: 2605 Comm: ax25ipd Not tainted 5.18.11-F6BVP #3\n[  205.798996] Hardware name: To be filled by O.E.M. To be filled by O.E.M./CK3, BIOS 5.011 09/16/2020\n[  205.798999] RIP: 0010:ref_tracker_free.cold+0x60/0x81\n[  205.799005] Code: e8 d2 01 9b ff 83 7b 18 00 74 14 48 c7 c7 2f d7 ff 98 e8 10 6e fc ff 8b 7b 18 e8 b8 01 9b ff 4c 89 ee 4c 89 e7 e8 5d fd 07 00 \u003c0f\u003e 0b b8 ea ff ff ff e9 30 05 9b ff 41 0f b6 f7 48 c7 c7 a0 fa 4e\n[  205.799008] RSP: 0018:ffffaf5281073958 EFLAGS: 00010286\n[  205.799011] RAX: 0000000080000000 RBX: ffff9a0bd687ebe0 RCX: 0000000000000000\n[  205.799014] RDX: 0000000000000001 RSI: 0000000000000282 RDI: 00000000ffffffff\n[  205.799016] RBP: ffffaf5281073a10 R08: 0000000000000003 R09: fffffffffffd5618\n[  205.799019] R10: 0000000000ffff10 R11: 000000000000000f R12: ffff9a0bc53384d0\n[  205.799022] R13: 0000000000000282 R14: 00000000ae000001 R15: 0000000000000001\n[  205.799024] FS:  0000000000000000(0000) GS:ffff9a0d0f300000(0000) knlGS:0000000000000000\n[  205.799028] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[  205.799031] CR2: 00007ff6b8311554 CR3: 000000001ac10004 CR4: 00000000001706e0\n[  205.799033] Call Trace:\n[  205.799035]  \u003cTASK\u003e\n[  205.799038]  ? ax25_dev_device_down+0xd9/\n---truncated---","modified":"2026-08-12T03:51:44.638412603Z","published":"2025-06-18T11:03:18.317Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50163.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/4294df1374450912b2f64ee3cf575069fc784679"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d08e3d71e5942f77fbff7f3529ed7fc82fbb3dfa"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d7c4c9e075f8cc6d88d277bc24e5d99297f03c06"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50163.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-50163"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"feef318c855a361a1eccd880f33e88c460eb63b4"},{"fixed":"d08e3d71e5942f77fbff7f3529ed7fc82fbb3dfa"},{"fixed":"4294df1374450912b2f64ee3cf575069fc784679"},{"fixed":"d7c4c9e075f8cc6d88d277bc24e5d99297f03c06"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"b8c07f33aa35dacf5444e7053ed9662d1869f536"},{"last_affected":"b1e0a6fc7f17500484c402ad1cd018c24dfc14b3"},{"last_affected":"7528d0f2210c3a1154186175516ed37aa970f2b1"},{"last_affected":"57cc15f5fd550316e4104eaf84b90fbc640fd7a5"},{"last_affected":"b982492ec3a115e0a136856a1b2dbe32f2d21a0e"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.14.277"},{"fixed":"4.15"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.19.240"},{"fixed":"4.20"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.4.190"},{"fixed":"5.5"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.10.112"},{"fixed":"5.11"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.15.35"},{"fixed":"5.16"}]}],"versions":["v4.19.239","v4.14.276","v5.15.34","v5.10.111","v5.4.189","v4.19.238","v4.14.275","v5.4.188","v4.19.237","v5.10.110","v5.15.33","v5.10.109","v5.15.32","v4.14.274","v5.15.31","v5.10.108","v5.4.187","v4.19.236","v4.14.273","v5.15.30","v5.10.107","v5.4.186","v4.19.235","v4.14.272","v5.15.29","v5.10.106","v5.4.185","v5.15.28","v5.10.105","v5.4.184","v4.19.234","v4.14.271","v5.15.27","v5.10.104","v5.4.183","v4.19.233","v4.14.270","v5.15.26","v5.10.103","v5.4.182","v4.19.232","v4.14.269","v5.15.25","v5.10.102","v5.4.181","v4.19.231","v4.14.268","v5.15.24","v5.10.101","v5.4.180","v4.19.230","v4.14.267","v5.15.23","v5.10.100","v5.4.179","v4.19.229","v4.14.266","v5.15.22","v5.10.99","v5.4.178","v4.19.228","v4.14.265","v5.15.21","v5.10.98","v5.4.177","v4.19.227","v4.14.264","v5.15.20","v5.10.97","v5.15.19","v5.10.96","v5.4.176","v5.15.18","v5.10.95","v5.4.175","v5.15.17","v5.10.94","v5.4.174","v4.19.226","v4.14.263","v5.15.16","v5.10.93","v5.4.173","v4.19.225","v4.14.262","v5.4.172","v5.10.92","v5.15.15","v5.4.171","v5.10.91","v5.15.14","v5.15.13","v5.10.90","v5.4.170","v4.19.224","v4.14.261","v5.15.12","v5.10.89","v5.4.169","v4.19.223","v4.14.260","v5.15.11","v5.10.88","v5.4.168","v4.19.222","v4.14.259","v5.15.10","v5.10.87","v5.4.167","v4.19.221","v4.14.258","v5.15.9","v5.10.86","v5.4.166","v5.4.165","v5.10.85","v5.15.8","v5.4.164","v5.10.84","v5.15.7","v4.19.220","v4.14.257","v5.15","v5.15.6","v5.10.83","v5.4.163","v4.19.219","v4.14.256","v4.19.218","v5.4.162","v5.10.82","v5.15.5","v4.14.255","v4.19.217","v5.4.161","v5.10.81","v5.15.4","v5.10.80","v5.15.3","v5.4.160","v5.15.2","v5.10.79","v5.4.159","v5.15.1","v5.10.78","v5.4.158","v4.19.216","v4.14.254","v5.10.77","v5.4.157","v4.19.215","v5.15-rc2","v5.15-rc1","v5.15-rc4","v5.15-rc7","v5.10.76","v5.4.156","v4.19.214","v4.14.253","v5.15-rc3","v5.15-rc5","v5.10.75","v5.4.155","v4.19.213","v4.14.252","v5.15-rc6","v5.10.74","v5.4.154","v4.19.212","v4.14.251","v5.14","v5.14-rc3","v5.10.73","v5.4.153","v4.19.211","v4.14.250","v4.19.210","v5.4.152","v5.10.72","v5.10.71","v5.4.151","v4.19.209","v4.14.249","v5.14-rc1","v5.10.70","v5.4.150","v4.19.208","v4.14.248","v5.10.69","v5.4.149","v5.10.68","v5.4.148","v4.19.207","v4.14.247","v5.10.67","v5.4.147","v4.19.206","v4.14.246","v5.10.66","v5.4.146","v5.10.65","v5.10.64","v5.4.145","v5.10.63","v5.4.144","v5.10.62","v5.10.61","v5.4.143","v4.19.205","v4.14.245","v5.14-rc2","v5.14-rc7","v5.14-rc6","v4.14.244","v4.19.204","v5.4.142","v5.10.60","v5.13-rc1","v5.14-rc5","v5.14-rc4","v5.10.59","v5.4.141","v5.10.58","v5.4.140","v4.19.203","v4.14.243","v5.10.57","v5.4.139","v4.19.202","v5.10.56","v5.4.138","v4.19.201","v4.14.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