{"id":"CVE-2023-53220","state":"PUBLISHED","title":"media: az6007: Fix null-ptr-deref in az6007_i2c_xfer()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: az6007: Fix null-ptr-deref in az6007_i2c_xfer()\n\nIn az6007_i2c_xfer, msg is controlled by user. When msg[i].buf\nis null and msg[i].len is zero, former checks on msg[i].buf would be\npassed. Malicious data finally reach az6007_i2c_xfer. If accessing\nmsg[i].buf[0] without sanity check, null ptr deref would happen.\nWe add check on msg[i].len to prevent crash.\n\nSimilar commit:\ncommit 0ed554fd769a\n(\"media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()\")","publishedAt":"2025-09-15T14:21:49.075Z","updatedAt":"2026-05-11T19:40:35.199Z","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":"caa1a700ed2a06a831e6a7db5d9f213fc63caee3","status":"affected","lessThan":"c6763fefa267f6e62595a6ac1f57815d99fc90b7","versionType":"git"},{"version":"caa1a700ed2a06a831e6a7db5d9f213fc63caee3","status":"affected","lessThan":"adcb73f8ce9aec48b1f85223f401c1574015d8d2","versionType":"git"},{"version":"caa1a700ed2a06a831e6a7db5d9f213fc63caee3","status":"affected","lessThan":"991c77fe18c6f374bbf83376f8c42550aa565662","versionType":"git"},{"version":"caa1a700ed2a06a831e6a7db5d9f213fc63caee3","status":"affected","lessThan":"a9def3e9718a4dc756f48db147d42ec41a966240","versionType":"git"},{"version":"caa1a700ed2a06a831e6a7db5d9f213fc63caee3","status":"affected","lessThan":"5b1ea100ad3695025969dc4693f307877fb688d6","versionType":"git"},{"version":"caa1a700ed2a06a831e6a7db5d9f213fc63caee3","status":"affected","lessThan":"6ab7ea4e17d6a605d05308adf8f3408924770cba","versionType":"git"},{"version":"caa1a700ed2a06a831e6a7db5d9f213fc63caee3","status":"affected","lessThan":"a1110f19d4940e4185251d072cbb0ff51486a1e7","versionType":"git"},{"version":"caa1a700ed2a06a831e6a7db5d9f213fc63caee3","status":"affected","lessThan":"1047f9343011f2cedc73c64829686206a7e9fc3f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/usb/dvb-usb-v2/az6007.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.4","versionType":"semver"},{"version":"4.14.326","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.295","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.257","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.197","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.133","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.55","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.5.5","status":"unaffected","lessThanOrEqual":"6.5.*","versionType":"semver"},{"version":"6.6","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/usb/dvb-usb-v2/az6007.c"]}],"references":["https://git.kernel.org/stable/c/c6763fefa267f6e62595a6ac1f57815d99fc90b7","https://git.kernel.org/stable/c/adcb73f8ce9aec48b1f85223f401c1574015d8d2","https://git.kernel.org/stable/c/991c77fe18c6f374bbf83376f8c42550aa565662","https://git.kernel.org/stable/c/a9def3e9718a4dc756f48db147d42ec41a966240","https://git.kernel.org/stable/c/5b1ea100ad3695025969dc4693f307877fb688d6","https://git.kernel.org/stable/c/6ab7ea4e17d6a605d05308adf8f3408924770cba","https://git.kernel.org/stable/c/a1110f19d4940e4185251d072cbb0ff51486a1e7","https://git.kernel.org/stable/c/1047f9343011f2cedc73c64829686206a7e9fc3f"],"weaknesses":["CWE-476"],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/53xxx/CVE-2023-53220.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53220","state":"PUBLISHED","datePublished":"2025-09-15T14:21:49.075Z","dateUpdated":"2026-05-11T19:40:35.199Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-09-15T14:19:21.845Z"},"containers":{"cna":{"title":"media: az6007: Fix null-ptr-deref in az6007_i2c_xfer()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: az6007: Fix null-ptr-deref in az6007_i2c_xfer()\n\nIn az6007_i2c_xfer, msg is controlled by user. When msg[i].buf\nis null and msg[i].len is zero, former checks on msg[i].buf would be\npassed. Malicious data finally reach az6007_i2c_xfer. If accessing\nmsg[i].buf[0] without sanity check, null ptr deref would happen.\nWe add check on msg[i].len to prevent crash.\n\nSimilar commit:\ncommit 0ed554fd769a\n(\"media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()\")"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"caa1a700ed2a06a831e6a7db5d9f213fc63caee3","status":"affected","lessThan":"c6763fefa267f6e62595a6ac1f57815d99fc90b7","versionType":"git"},{"version":"caa1a700ed2a06a831e6a7db5d9f213fc63caee3","status":"affected","lessThan":"adcb73f8ce9aec48b1f85223f401c1574015d8d2","versionType":"git"},{"version":"caa1a700ed2a06a831e6a7db5d9f213fc63caee3","status":"affected","lessThan":"991c77fe18c6f374bbf83376f8c42550aa565662","versionType":"git"},{"version":"caa1a700ed2a06a831e6a7db5d9f213fc63caee3","status":"affected","lessThan":"a9def3e9718a4dc756f48db147d42ec41a966240","versionType":"git"},{"version":"caa1a700ed2a06a831e6a7db5d9f213fc63caee3","status":"affected","lessThan":"5b1ea100ad3695025969dc4693f307877fb688d6","versionType":"git"},{"version":"caa1a700ed2a06a831e6a7db5d9f213fc63caee3","status":"affected","lessThan":"6ab7ea4e17d6a605d05308adf8f3408924770cba","versionType":"git"},{"version":"caa1a700ed2a06a831e6a7db5d9f213fc63caee3","status":"affected","lessThan":"a1110f19d4940e4185251d072cbb0ff51486a1e7","versionType":"git"},{"version":"caa1a700ed2a06a831e6a7db5d9f213fc63caee3","status":"affected","lessThan":"1047f9343011f2cedc73c64829686206a7e9fc3f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/usb/dvb-usb-v2/az6007.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.4","versionType":"semver"},{"version":"4.14.326","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.295","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.257","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.197","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.133","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.55","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.5.5","status":"unaffected","lessThanOrEqual":"6.5.*","versionType":"semver"},{"version":"6.6","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/usb/dvb-usb-v2/az6007.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/c6763fefa267f6e62595a6ac1f57815d99fc90b7"},{"url":"https://git.kernel.org/stable/c/adcb73f8ce9aec48b1f85223f401c1574015d8d2"},{"url":"https://git.kernel.org/stable/c/991c77fe18c6f374bbf83376f8c42550aa565662"},{"url":"https://git.kernel.org/stable/c/a9def3e9718a4dc756f48db147d42ec41a966240"},{"url":"https://git.kernel.org/stable/c/5b1ea100ad3695025969dc4693f307877fb688d6"},{"url":"https://git.kernel.org/stable/c/6ab7ea4e17d6a605d05308adf8f3408924770cba"},{"url":"https://git.kernel.org/stable/c/a1110f19d4940e4185251d072cbb0ff51486a1e7"},{"url":"https://git.kernel.org/stable/c/1047f9343011f2cedc73c64829686206a7e9fc3f"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:40:35.199Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"4.14.326"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"4.19.295"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"5.4.257"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"5.10.197"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"5.15.133"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"6.1.55"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"6.5.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"6.6"}]}]}],"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-2023-53220","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-01-14T17:50:08.533952Z"}}}],"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":"2026-01-14T17:52:58.476Z"}}]}}}