{"id":"CVE-2023-53356","state":"PUBLISHED","title":"usb: gadget: u_serial: Add null pointer check in gserial_suspend","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: u_serial: Add null pointer check in gserial_suspend\n\nConsider a case where gserial_disconnect has already cleared\ngser->ioport. And if gserial_suspend gets called afterwards,\nit will lead to accessing of gser->ioport and thus causing\nnull pointer dereference.\n\nAvoid this by adding a null pointer check. Added a static\nspinlock to prevent gser->ioport from becoming null after\nthe newly added null pointer check.","publishedAt":"2025-09-17T14:56:46.113Z","updatedAt":"2026-05-11T19:43:21.819Z","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":"aba3a8d01d623a5efef48ab8e78752d58d4c90c3","status":"affected","lessThan":"2788a3553f7497075653210b42e2aeb6ba95e28e","versionType":"git"},{"version":"aba3a8d01d623a5efef48ab8e78752d58d4c90c3","status":"affected","lessThan":"a8ea7ed644cbf6314b5b0136b5398754b549fb8f","versionType":"git"},{"version":"aba3a8d01d623a5efef48ab8e78752d58d4c90c3","status":"affected","lessThan":"e60a827ac074ce6bd58305fe5a86afab5fce6a04","versionType":"git"},{"version":"aba3a8d01d623a5efef48ab8e78752d58d4c90c3","status":"affected","lessThan":"374447e3367767156405bedd230c5d391f4b7962","versionType":"git"},{"version":"aba3a8d01d623a5efef48ab8e78752d58d4c90c3","status":"affected","lessThan":"2f6ecb89fe8feb2b60a53325b0eeb9866d88909a","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":"5.10.188","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.121","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.39","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.4.4","status":"unaffected","lessThanOrEqual":"6.4.*","versionType":"semver"},{"version":"6.5","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/2788a3553f7497075653210b42e2aeb6ba95e28e","https://git.kernel.org/stable/c/a8ea7ed644cbf6314b5b0136b5398754b549fb8f","https://git.kernel.org/stable/c/e60a827ac074ce6bd58305fe5a86afab5fce6a04","https://git.kernel.org/stable/c/374447e3367767156405bedd230c5d391f4b7962","https://git.kernel.org/stable/c/2f6ecb89fe8feb2b60a53325b0eeb9866d88909a"],"weaknesses":["CWE-476"],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/53xxx/CVE-2023-53356.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53356","state":"PUBLISHED","datePublished":"2025-09-17T14:56:46.113Z","dateUpdated":"2026-05-11T19:43:21.819Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-09-16T16:08:59.567Z"},"containers":{"cna":{"title":"usb: gadget: u_serial: Add null pointer check in gserial_suspend","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_suspend\n\nConsider a case where gserial_disconnect has already cleared\ngser->ioport. And if gserial_suspend gets called afterwards,\nit will lead to accessing of gser->ioport and thus causing\nnull pointer dereference.\n\nAvoid this by adding a null pointer check. Added a static\nspinlock to prevent gser->ioport from becoming null after\nthe newly added null pointer check."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"aba3a8d01d623a5efef48ab8e78752d58d4c90c3","status":"affected","lessThan":"2788a3553f7497075653210b42e2aeb6ba95e28e","versionType":"git"},{"version":"aba3a8d01d623a5efef48ab8e78752d58d4c90c3","status":"affected","lessThan":"a8ea7ed644cbf6314b5b0136b5398754b549fb8f","versionType":"git"},{"version":"aba3a8d01d623a5efef48ab8e78752d58d4c90c3","status":"affected","lessThan":"e60a827ac074ce6bd58305fe5a86afab5fce6a04","versionType":"git"},{"version":"aba3a8d01d623a5efef48ab8e78752d58d4c90c3","status":"affected","lessThan":"374447e3367767156405bedd230c5d391f4b7962","versionType":"git"},{"version":"aba3a8d01d623a5efef48ab8e78752d58d4c90c3","status":"affected","lessThan":"2f6ecb89fe8feb2b60a53325b0eeb9866d88909a","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":"5.10.188","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.121","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.39","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.4.4","status":"unaffected","lessThanOrEqual":"6.4.*","versionType":"semver"},{"version":"6.5","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/2788a3553f7497075653210b42e2aeb6ba95e28e"},{"url":"https://git.kernel.org/stable/c/a8ea7ed644cbf6314b5b0136b5398754b549fb8f"},{"url":"https://git.kernel.org/stable/c/e60a827ac074ce6bd58305fe5a86afab5fce6a04"},{"url":"https://git.kernel.org/stable/c/374447e3367767156405bedd230c5d391f4b7962"},{"url":"https://git.kernel.org/stable/c/2f6ecb89fe8feb2b60a53325b0eeb9866d88909a"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:43:21.819Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"5.10.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"5.15.121"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.1.39"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.4.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.5"}]}]}],"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-2023-53356","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-01-14T18:42:52.369730Z"}}}],"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":"2026-01-14T18:43:04.391Z"}}]}}}