{"id":"CVE-2022-48938","state":"PUBLISHED","title":"CDC-NCM: avoid overflow in sanity checking","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nCDC-NCM: avoid overflow in sanity checking\n\nA broken device may give an extreme offset like 0xFFF0\nand a reasonable length for a fragment. In the sanity\ncheck as formulated now, this will create an integer\noverflow, defeating the sanity check. Both offset\nand offset + len need to be checked in such a manner\nthat no overflow can occur.\nAnd those quantities should be unsigned.","publishedAt":"2024-08-22T03:31:33.381Z","updatedAt":"2026-05-23T15:21:07.103Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4ca8b8855264cf1439cdab3da7049bd1e3c2a9e6","status":"affected","lessThan":"a612395c7631918e0e10ea48b9ce5ab4340f26a6","versionType":"git"},{"version":"a270ca35a9499b58366d696d3290eaa4697a42db","status":"affected","lessThan":"9957fbf34f52a4d8945d1bf39aae400ef9a11246","versionType":"git"},{"version":"0fa81b304a7973a499f844176ca031109487dd31","status":"affected","lessThan":"69560efa001397ebb8dc1c3e6a3ce00302bb9f7f","versionType":"git"},{"version":"0fa81b304a7973a499f844176ca031109487dd31","status":"affected","lessThan":"49909c9f8458cacb5b241106cba65aba5a6d8f4c","versionType":"git"},{"version":"0fa81b304a7973a499f844176ca031109487dd31","status":"affected","lessThan":"7b737e47b87589031f0d4657f6d7b0b770474925","versionType":"git"},{"version":"0fa81b304a7973a499f844176ca031109487dd31","status":"affected","lessThan":"8d2b1a1ec9f559d30b724877da4ce592edc41fdc","versionType":"git"},{"version":"8cf7db86a8984ffa3a3388a8df12bc0aa4c79bd7","status":"affected","versionType":"git"},{"version":"4.19.285","status":"affected","lessThan":"4.19.323","versionType":"semver"},{"version":"5.4.245","status":"affected","lessThan":"5.4.285","versionType":"semver"},{"version":"4.14.317","status":"affected","lessThan":"4.15","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/usb/cdc_ncm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.7","versionType":"semver"},{"version":"4.19.323","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.285","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.103","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.26","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16.12","status":"unaffected","lessThanOrEqual":"5.16.*","versionType":"semver"},{"version":"5.17","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/usb/cdc_ncm.c"]}],"references":["https://git.kernel.org/stable/c/a612395c7631918e0e10ea48b9ce5ab4340f26a6","https://git.kernel.org/stable/c/9957fbf34f52a4d8945d1bf39aae400ef9a11246","https://git.kernel.org/stable/c/69560efa001397ebb8dc1c3e6a3ce00302bb9f7f","https://git.kernel.org/stable/c/49909c9f8458cacb5b241106cba65aba5a6d8f4c","https://git.kernel.org/stable/c/7b737e47b87589031f0d4657f6d7b0b770474925","https://git.kernel.org/stable/c/8d2b1a1ec9f559d30b724877da4ce592edc41fdc"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/48xxx/CVE-2022-48938.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-48938","state":"PUBLISHED","datePublished":"2024-08-22T03:31:33.381Z","dateUpdated":"2026-05-23T15:21:07.103Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-08-22T01:27:53.623Z"},"containers":{"cna":{"title":"CDC-NCM: avoid overflow in sanity checking","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nCDC-NCM: avoid overflow in sanity checking\n\nA broken device may give an extreme offset like 0xFFF0\nand a reasonable length for a fragment. In the sanity\ncheck as formulated now, this will create an integer\noverflow, defeating the sanity check. Both offset\nand offset + len need to be checked in such a manner\nthat no overflow can occur.\nAnd those quantities should be unsigned."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4ca8b8855264cf1439cdab3da7049bd1e3c2a9e6","status":"affected","lessThan":"a612395c7631918e0e10ea48b9ce5ab4340f26a6","versionType":"git"},{"version":"a270ca35a9499b58366d696d3290eaa4697a42db","status":"affected","lessThan":"9957fbf34f52a4d8945d1bf39aae400ef9a11246","versionType":"git"},{"version":"0fa81b304a7973a499f844176ca031109487dd31","status":"affected","lessThan":"69560efa001397ebb8dc1c3e6a3ce00302bb9f7f","versionType":"git"},{"version":"0fa81b304a7973a499f844176ca031109487dd31","status":"affected","lessThan":"49909c9f8458cacb5b241106cba65aba5a6d8f4c","versionType":"git"},{"version":"0fa81b304a7973a499f844176ca031109487dd31","status":"affected","lessThan":"7b737e47b87589031f0d4657f6d7b0b770474925","versionType":"git"},{"version":"0fa81b304a7973a499f844176ca031109487dd31","status":"affected","lessThan":"8d2b1a1ec9f559d30b724877da4ce592edc41fdc","versionType":"git"},{"version":"8cf7db86a8984ffa3a3388a8df12bc0aa4c79bd7","status":"affected","versionType":"git"},{"version":"4.19.285","status":"affected","lessThan":"4.19.323","versionType":"semver"},{"version":"5.4.245","status":"affected","lessThan":"5.4.285","versionType":"semver"},{"version":"4.14.317","status":"affected","lessThan":"4.15","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/usb/cdc_ncm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.7","versionType":"semver"},{"version":"4.19.323","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.285","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.103","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.26","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16.12","status":"unaffected","lessThanOrEqual":"5.16.*","versionType":"semver"},{"version":"5.17","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/usb/cdc_ncm.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/a612395c7631918e0e10ea48b9ce5ab4340f26a6"},{"url":"https://git.kernel.org/stable/c/9957fbf34f52a4d8945d1bf39aae400ef9a11246"},{"url":"https://git.kernel.org/stable/c/69560efa001397ebb8dc1c3e6a3ce00302bb9f7f"},{"url":"https://git.kernel.org/stable/c/49909c9f8458cacb5b241106cba65aba5a6d8f4c"},{"url":"https://git.kernel.org/stable/c/7b737e47b87589031f0d4657f6d7b0b770474925"},{"url":"https://git.kernel.org/stable/c/8d2b1a1ec9f559d30b724877da4ce592edc41fdc"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T15:21:07.103Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19.285","versionEndExcluding":"4.19.323"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.245","versionEndExcluding":"5.4.285"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"5.10.103"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"5.15.26"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"5.16.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"5.17"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14.317"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2022-48938","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T15:32:27.711835Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-09-12T17:32:59.501Z"}}]}}}