{"id":"CVE-2023-53551","state":"PUBLISHED","title":"usb: gadget: u_serial: Add null pointer check in gserial_resume","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: u_serial: Add null pointer check in gserial_resume\n\nConsider a case where gserial_disconnect has already cleared\ngser->ioport. And if a wakeup interrupt triggers afterwards,\ngserial_resume gets called, which will lead to accessing of\ngser->ioport and thus causing null pointer dereference.Add\na null pointer check to prevent this.\n\nAdded a static spinlock to prevent gser->ioport from becoming\nnull after the newly added check.","publishedAt":"2025-10-04T15:16:57.736Z","updatedAt":"2026-05-11T19:47:09.678Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"aba3a8d01d623a5efef48ab8e78752d58d4c90c3","status":"affected","lessThan":"c5360eec648bd506afa304ae4a71f82e13d41897","versionType":"git"},{"version":"aba3a8d01d623a5efef48ab8e78752d58d4c90c3","status":"affected","lessThan":"3b24c980dc07be4550a9d1450ed7057f882530e5","versionType":"git"},{"version":"aba3a8d01d623a5efef48ab8e78752d58d4c90c3","status":"affected","lessThan":"ec357cd3e8af614855d286dd378725cdc7264df6","versionType":"git"},{"version":"aba3a8d01d623a5efef48ab8e78752d58d4c90c3","status":"affected","lessThan":"44e004f757a7ae13dfebaadbcfdb1a6f98c10377","versionType":"git"},{"version":"aba3a8d01d623a5efef48ab8e78752d58d4c90c3","status":"affected","lessThan":"5ec63fdbca604568890c577753c6f66c5b3ef0b5","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/function/u_serial.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.8","versionType":"semver"},{"version":"5.10.171","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.97","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.15","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2.2","status":"unaffected","lessThanOrEqual":"6.2.*","versionType":"semver"},{"version":"6.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/function/u_serial.c"]}],"references":["https://git.kernel.org/stable/c/c5360eec648bd506afa304ae4a71f82e13d41897","https://git.kernel.org/stable/c/3b24c980dc07be4550a9d1450ed7057f882530e5","https://git.kernel.org/stable/c/ec357cd3e8af614855d286dd378725cdc7264df6","https://git.kernel.org/stable/c/44e004f757a7ae13dfebaadbcfdb1a6f98c10377","https://git.kernel.org/stable/c/5ec63fdbca604568890c577753c6f66c5b3ef0b5"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/53xxx/CVE-2023-53551.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53551","state":"PUBLISHED","datePublished":"2025-10-04T15:16:57.736Z","dateUpdated":"2026-05-11T19:47:09.678Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-10-04T15:14:15.922Z"},"containers":{"cna":{"title":"usb: gadget: u_serial: Add null pointer check in gserial_resume","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: u_serial: Add null pointer check in gserial_resume\n\nConsider a case where gserial_disconnect has already cleared\ngser->ioport. And if a wakeup interrupt triggers afterwards,\ngserial_resume gets called, which will lead to accessing of\ngser->ioport and thus causing null pointer dereference.Add\na null pointer check to prevent this.\n\nAdded a static spinlock to prevent gser->ioport from becoming\nnull after the newly added check."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"aba3a8d01d623a5efef48ab8e78752d58d4c90c3","status":"affected","lessThan":"c5360eec648bd506afa304ae4a71f82e13d41897","versionType":"git"},{"version":"aba3a8d01d623a5efef48ab8e78752d58d4c90c3","status":"affected","lessThan":"3b24c980dc07be4550a9d1450ed7057f882530e5","versionType":"git"},{"version":"aba3a8d01d623a5efef48ab8e78752d58d4c90c3","status":"affected","lessThan":"ec357cd3e8af614855d286dd378725cdc7264df6","versionType":"git"},{"version":"aba3a8d01d623a5efef48ab8e78752d58d4c90c3","status":"affected","lessThan":"44e004f757a7ae13dfebaadbcfdb1a6f98c10377","versionType":"git"},{"version":"aba3a8d01d623a5efef48ab8e78752d58d4c90c3","status":"affected","lessThan":"5ec63fdbca604568890c577753c6f66c5b3ef0b5","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/function/u_serial.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.8","versionType":"semver"},{"version":"5.10.171","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.97","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.15","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2.2","status":"unaffected","lessThanOrEqual":"6.2.*","versionType":"semver"},{"version":"6.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/function/u_serial.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/c5360eec648bd506afa304ae4a71f82e13d41897"},{"url":"https://git.kernel.org/stable/c/3b24c980dc07be4550a9d1450ed7057f882530e5"},{"url":"https://git.kernel.org/stable/c/ec357cd3e8af614855d286dd378725cdc7264df6"},{"url":"https://git.kernel.org/stable/c/44e004f757a7ae13dfebaadbcfdb1a6f98c10377"},{"url":"https://git.kernel.org/stable/c/5ec63fdbca604568890c577753c6f66c5b3ef0b5"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:47:09.678Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"5.10.171"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"5.15.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.1.15"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.2.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}