{"id":"CVE-2022-49307","summary":"tty: synclink_gt: Fix null-pointer-dereference in slgt_clean()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ntty: synclink_gt: Fix null-pointer-dereference in slgt_clean()\n\nWhen the driver fails at alloc_hdlcdev(), and then we remove the driver\nmodule, we will get the following splat:\n\n[   25.065966] general protection fault, probably for non-canonical address 0xdffffc0000000182: 0000 [#1] PREEMPT SMP KASAN PTI\n[   25.066914] KASAN: null-ptr-deref in range [0x0000000000000c10-0x0000000000000c17]\n[   25.069262] RIP: 0010:detach_hdlc_protocol+0x2a/0x3e0\n[   25.077709] Call Trace:\n[   25.077924]  \u003cTASK\u003e\n[   25.078108]  unregister_hdlc_device+0x16/0x30\n[   25.078481]  slgt_cleanup+0x157/0x9f0 [synclink_gt]\n\nFix this by checking whether the 'info-\u003enetdev' is a null pointer first.","modified":"2026-05-12T03:52:14.764468Z","published":"2025-02-26T02:10:39.151Z","related":["SUSE-SU-2025:1027-1","SUSE-SU-2025:1176-1","SUSE-SU-2025:1183-1","SUSE-SU-2025:1194-1","SUSE-SU-2025:1241-1","SUSE-SU-2025:1263-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49307.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/078212ad15dbd88840c82c97f12c93d83703c8fd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1ceb4ca9543a8a788febf6bc8dad2e605e172d5e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/50c341f9a2adc4c32a8ad5a39eb99d9c4a419e0d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/689ca31c542687709ba21ec2195c1fbce34fd029"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8a95696bdc0e13f8980f05b54a3b9081963d1256"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ba08cbc5b53e151d0acf1930fb526fc65b7f3e65"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d68d5e68b7f64de7170f8e04dd9b995c36b2c71c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ddd67751ab86c6a65f95c35293c42f85a42ac05d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f6e07eb7ebec53ffe81fc2489589320fbe4a6b75"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49307.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49307"},{"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":"705b6c7b34f2621f95f606d0e683daa10cdb8eb9"},{"fixed":"50c341f9a2adc4c32a8ad5a39eb99d9c4a419e0d"},{"fixed":"078212ad15dbd88840c82c97f12c93d83703c8fd"},{"fixed":"ba08cbc5b53e151d0acf1930fb526fc65b7f3e65"},{"fixed":"f6e07eb7ebec53ffe81fc2489589320fbe4a6b75"},{"fixed":"d68d5e68b7f64de7170f8e04dd9b995c36b2c71c"},{"fixed":"8a95696bdc0e13f8980f05b54a3b9081963d1256"},{"fixed":"ddd67751ab86c6a65f95c35293c42f85a42ac05d"},{"fixed":"1ceb4ca9543a8a788febf6bc8dad2e605e172d5e"},{"fixed":"689ca31c542687709ba21ec2195c1fbce34fd029"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49307.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.16"},{"fixed":"4.9.318"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.10.0"},{"fixed":"4.14.283"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.15.0"},{"fixed":"4.19.247"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.20.0"},{"fixed":"5.4.198"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.10.122"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.47"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"5.17.15"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.18.0"},{"fixed":"5.18.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49307.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}