{"id":"CVE-2022-49307","state":"PUBLISHED","title":"tty: synclink_gt: Fix null-pointer-dereference in slgt_clean()","description":"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]  <TASK>\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->netdev' is a null pointer first.","publishedAt":"2025-02-26T02:10:39.151Z","updatedAt":"2026-05-11T18:57:09.382Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"705b6c7b34f2621f95f606d0e683daa10cdb8eb9","status":"affected","lessThan":"50c341f9a2adc4c32a8ad5a39eb99d9c4a419e0d","versionType":"git"},{"version":"705b6c7b34f2621f95f606d0e683daa10cdb8eb9","status":"affected","lessThan":"078212ad15dbd88840c82c97f12c93d83703c8fd","versionType":"git"},{"version":"705b6c7b34f2621f95f606d0e683daa10cdb8eb9","status":"affected","lessThan":"ba08cbc5b53e151d0acf1930fb526fc65b7f3e65","versionType":"git"},{"version":"705b6c7b34f2621f95f606d0e683daa10cdb8eb9","status":"affected","lessThan":"f6e07eb7ebec53ffe81fc2489589320fbe4a6b75","versionType":"git"},{"version":"705b6c7b34f2621f95f606d0e683daa10cdb8eb9","status":"affected","lessThan":"d68d5e68b7f64de7170f8e04dd9b995c36b2c71c","versionType":"git"},{"version":"705b6c7b34f2621f95f606d0e683daa10cdb8eb9","status":"affected","lessThan":"8a95696bdc0e13f8980f05b54a3b9081963d1256","versionType":"git"},{"version":"705b6c7b34f2621f95f606d0e683daa10cdb8eb9","status":"affected","lessThan":"ddd67751ab86c6a65f95c35293c42f85a42ac05d","versionType":"git"},{"version":"705b6c7b34f2621f95f606d0e683daa10cdb8eb9","status":"affected","lessThan":"1ceb4ca9543a8a788febf6bc8dad2e605e172d5e","versionType":"git"},{"version":"705b6c7b34f2621f95f606d0e683daa10cdb8eb9","status":"affected","lessThan":"689ca31c542687709ba21ec2195c1fbce34fd029","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tty/synclink_gt.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.16","versionType":"semver"},{"version":"4.9.318","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.283","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.247","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.198","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.122","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.47","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.17.15","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18.4","status":"unaffected","lessThanOrEqual":"5.18.*","versionType":"semver"},{"version":"5.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tty/synclink_gt.c"]}],"references":["https://git.kernel.org/stable/c/50c341f9a2adc4c32a8ad5a39eb99d9c4a419e0d","https://git.kernel.org/stable/c/078212ad15dbd88840c82c97f12c93d83703c8fd","https://git.kernel.org/stable/c/ba08cbc5b53e151d0acf1930fb526fc65b7f3e65","https://git.kernel.org/stable/c/f6e07eb7ebec53ffe81fc2489589320fbe4a6b75","https://git.kernel.org/stable/c/d68d5e68b7f64de7170f8e04dd9b995c36b2c71c","https://git.kernel.org/stable/c/8a95696bdc0e13f8980f05b54a3b9081963d1256","https://git.kernel.org/stable/c/ddd67751ab86c6a65f95c35293c42f85a42ac05d","https://git.kernel.org/stable/c/1ceb4ca9543a8a788febf6bc8dad2e605e172d5e","https://git.kernel.org/stable/c/689ca31c542687709ba21ec2195c1fbce34fd029"],"weaknesses":["CWE-476"],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/49xxx/CVE-2022-49307.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49307","state":"PUBLISHED","datePublished":"2025-02-26T02:10:39.151Z","dateUpdated":"2026-05-11T18:57:09.382Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-02-26T02:08:31.535Z"},"containers":{"cna":{"title":"tty: synclink_gt: Fix null-pointer-dereference in slgt_clean()","descriptions":[{"lang":"en","value":"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]  <TASK>\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->netdev' is a null pointer first."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"705b6c7b34f2621f95f606d0e683daa10cdb8eb9","status":"affected","lessThan":"50c341f9a2adc4c32a8ad5a39eb99d9c4a419e0d","versionType":"git"},{"version":"705b6c7b34f2621f95f606d0e683daa10cdb8eb9","status":"affected","lessThan":"078212ad15dbd88840c82c97f12c93d83703c8fd","versionType":"git"},{"version":"705b6c7b34f2621f95f606d0e683daa10cdb8eb9","status":"affected","lessThan":"ba08cbc5b53e151d0acf1930fb526fc65b7f3e65","versionType":"git"},{"version":"705b6c7b34f2621f95f606d0e683daa10cdb8eb9","status":"affected","lessThan":"f6e07eb7ebec53ffe81fc2489589320fbe4a6b75","versionType":"git"},{"version":"705b6c7b34f2621f95f606d0e683daa10cdb8eb9","status":"affected","lessThan":"d68d5e68b7f64de7170f8e04dd9b995c36b2c71c","versionType":"git"},{"version":"705b6c7b34f2621f95f606d0e683daa10cdb8eb9","status":"affected","lessThan":"8a95696bdc0e13f8980f05b54a3b9081963d1256","versionType":"git"},{"version":"705b6c7b34f2621f95f606d0e683daa10cdb8eb9","status":"affected","lessThan":"ddd67751ab86c6a65f95c35293c42f85a42ac05d","versionType":"git"},{"version":"705b6c7b34f2621f95f606d0e683daa10cdb8eb9","status":"affected","lessThan":"1ceb4ca9543a8a788febf6bc8dad2e605e172d5e","versionType":"git"},{"version":"705b6c7b34f2621f95f606d0e683daa10cdb8eb9","status":"affected","lessThan":"689ca31c542687709ba21ec2195c1fbce34fd029","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tty/synclink_gt.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.16","versionType":"semver"},{"version":"4.9.318","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.283","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.247","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.198","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.122","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.47","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.17.15","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18.4","status":"unaffected","lessThanOrEqual":"5.18.*","versionType":"semver"},{"version":"5.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tty/synclink_gt.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/50c341f9a2adc4c32a8ad5a39eb99d9c4a419e0d"},{"url":"https://git.kernel.org/stable/c/078212ad15dbd88840c82c97f12c93d83703c8fd"},{"url":"https://git.kernel.org/stable/c/ba08cbc5b53e151d0acf1930fb526fc65b7f3e65"},{"url":"https://git.kernel.org/stable/c/f6e07eb7ebec53ffe81fc2489589320fbe4a6b75"},{"url":"https://git.kernel.org/stable/c/d68d5e68b7f64de7170f8e04dd9b995c36b2c71c"},{"url":"https://git.kernel.org/stable/c/8a95696bdc0e13f8980f05b54a3b9081963d1256"},{"url":"https://git.kernel.org/stable/c/ddd67751ab86c6a65f95c35293c42f85a42ac05d"},{"url":"https://git.kernel.org/stable/c/1ceb4ca9543a8a788febf6bc8dad2e605e172d5e"},{"url":"https://git.kernel.org/stable/c/689ca31c542687709ba21ec2195c1fbce34fd029"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T18:57:09.382Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"4.9.318"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"4.14.283"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"4.19.247"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"5.4.198"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"5.10.122"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"5.15.47"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"5.17.15"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"5.18.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"5.19"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"id":"CVE-2022-49307","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2025-10-01T19:44:25.712102Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-476","lang":"en","type":"CWE","description":"CWE-476 NULL Pointer Dereference"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-10-01T19:46:58.412Z"}}]}}}