{"id":"CVE-2022-50272","state":"PUBLISHED","title":"media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()\n\nWei Chen reports a kernel bug as blew:\n\ngeneral protection fault, probably for non-canonical address\nKASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]\n...\nCall Trace:\n<TASK>\n__i2c_transfer+0x77e/0x1930 drivers/i2c/i2c-core-base.c:2109\ni2c_transfer+0x1d5/0x3d0 drivers/i2c/i2c-core-base.c:2170\ni2cdev_ioctl_rdwr+0x393/0x660 drivers/i2c/i2c-dev.c:297\ni2cdev_ioctl+0x75d/0x9f0 drivers/i2c/i2c-dev.c:458\nvfs_ioctl fs/ioctl.c:51 [inline]\n__do_sys_ioctl fs/ioctl.c:870 [inline]\n__se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856\ndo_syscall_x64 arch/x86/entry/common.c:50 [inline]\ndo_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80\nentry_SYSCALL_64_after_hwframe+0x63/0xcd\nRIP: 0033:0x7fd834a8bded\n\nIn az6027_i2c_xfer(), if msg[i].addr is 0x99,\na null-ptr-deref will caused when accessing msg[i].buf.\nFor msg[i].len is 0 and msg[i].buf is null.\n\nFix this by checking msg[i].len in az6027_i2c_xfer().","publishedAt":"2025-09-15T14:21:08.534Z","updatedAt":"2026-05-11T19:16:07.161Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"76f9a820c8672ada12ffa0903652c9e6f2429462","status":"affected","lessThan":"2b6a8a1a32746981044e7ab06649c804acb4068a","versionType":"git"},{"version":"76f9a820c8672ada12ffa0903652c9e6f2429462","status":"affected","lessThan":"c712d1ccbfb787620422b437a5b8fac0802547bd","versionType":"git"},{"version":"76f9a820c8672ada12ffa0903652c9e6f2429462","status":"affected","lessThan":"7abfe467cd685f5da7ecb415441e45e3e4e2baa8","versionType":"git"},{"version":"76f9a820c8672ada12ffa0903652c9e6f2429462","status":"affected","lessThan":"8b256d23361c51aa4b7fdb71176c1ca50966fb39","versionType":"git"},{"version":"76f9a820c8672ada12ffa0903652c9e6f2429462","status":"affected","lessThan":"559891d430e3f3a178040c4371ed419edbfa7d65","versionType":"git"},{"version":"76f9a820c8672ada12ffa0903652c9e6f2429462","status":"affected","lessThan":"210fcf64be4db82c0e190e74b5111e4eef661a7a","versionType":"git"},{"version":"76f9a820c8672ada12ffa0903652c9e6f2429462","status":"affected","lessThan":"6fbc44731a4665cbe92a5090e9804a388a72214b","versionType":"git"},{"version":"76f9a820c8672ada12ffa0903652c9e6f2429462","status":"affected","lessThan":"6b60cf73a931af34b7a0a3f467a79d9fe0df2d70","versionType":"git"},{"version":"76f9a820c8672ada12ffa0903652c9e6f2429462","status":"affected","lessThan":"0ed554fd769a19ea8464bb83e9ac201002ef74ad","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/usb/dvb-usb/az6027.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.34","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.34","versionType":"semver"},{"version":"4.9.337","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.303","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.270","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.229","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.163","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.86","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.0.16","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1.2","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2","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/az6027.c"]}],"references":["https://git.kernel.org/stable/c/2b6a8a1a32746981044e7ab06649c804acb4068a","https://git.kernel.org/stable/c/c712d1ccbfb787620422b437a5b8fac0802547bd","https://git.kernel.org/stable/c/7abfe467cd685f5da7ecb415441e45e3e4e2baa8","https://git.kernel.org/stable/c/8b256d23361c51aa4b7fdb71176c1ca50966fb39","https://git.kernel.org/stable/c/559891d430e3f3a178040c4371ed419edbfa7d65","https://git.kernel.org/stable/c/210fcf64be4db82c0e190e74b5111e4eef661a7a","https://git.kernel.org/stable/c/6fbc44731a4665cbe92a5090e9804a388a72214b","https://git.kernel.org/stable/c/6b60cf73a931af34b7a0a3f467a79d9fe0df2d70","https://git.kernel.org/stable/c/0ed554fd769a19ea8464bb83e9ac201002ef74ad"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/50xxx/CVE-2022-50272.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-50272","state":"PUBLISHED","datePublished":"2025-09-15T14:21:08.534Z","dateUpdated":"2026-05-11T19:16:07.161Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-09-15T13:58:00.975Z"},"containers":{"cna":{"title":"media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()\n\nWei Chen reports a kernel bug as blew:\n\ngeneral protection fault, probably for non-canonical address\nKASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]\n...\nCall Trace:\n<TASK>\n__i2c_transfer+0x77e/0x1930 drivers/i2c/i2c-core-base.c:2109\ni2c_transfer+0x1d5/0x3d0 drivers/i2c/i2c-core-base.c:2170\ni2cdev_ioctl_rdwr+0x393/0x660 drivers/i2c/i2c-dev.c:297\ni2cdev_ioctl+0x75d/0x9f0 drivers/i2c/i2c-dev.c:458\nvfs_ioctl fs/ioctl.c:51 [inline]\n__do_sys_ioctl fs/ioctl.c:870 [inline]\n__se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856\ndo_syscall_x64 arch/x86/entry/common.c:50 [inline]\ndo_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80\nentry_SYSCALL_64_after_hwframe+0x63/0xcd\nRIP: 0033:0x7fd834a8bded\n\nIn az6027_i2c_xfer(), if msg[i].addr is 0x99,\na null-ptr-deref will caused when accessing msg[i].buf.\nFor msg[i].len is 0 and msg[i].buf is null.\n\nFix this by checking msg[i].len in az6027_i2c_xfer()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"76f9a820c8672ada12ffa0903652c9e6f2429462","status":"affected","lessThan":"2b6a8a1a32746981044e7ab06649c804acb4068a","versionType":"git"},{"version":"76f9a820c8672ada12ffa0903652c9e6f2429462","status":"affected","lessThan":"c712d1ccbfb787620422b437a5b8fac0802547bd","versionType":"git"},{"version":"76f9a820c8672ada12ffa0903652c9e6f2429462","status":"affected","lessThan":"7abfe467cd685f5da7ecb415441e45e3e4e2baa8","versionType":"git"},{"version":"76f9a820c8672ada12ffa0903652c9e6f2429462","status":"affected","lessThan":"8b256d23361c51aa4b7fdb71176c1ca50966fb39","versionType":"git"},{"version":"76f9a820c8672ada12ffa0903652c9e6f2429462","status":"affected","lessThan":"559891d430e3f3a178040c4371ed419edbfa7d65","versionType":"git"},{"version":"76f9a820c8672ada12ffa0903652c9e6f2429462","status":"affected","lessThan":"210fcf64be4db82c0e190e74b5111e4eef661a7a","versionType":"git"},{"version":"76f9a820c8672ada12ffa0903652c9e6f2429462","status":"affected","lessThan":"6fbc44731a4665cbe92a5090e9804a388a72214b","versionType":"git"},{"version":"76f9a820c8672ada12ffa0903652c9e6f2429462","status":"affected","lessThan":"6b60cf73a931af34b7a0a3f467a79d9fe0df2d70","versionType":"git"},{"version":"76f9a820c8672ada12ffa0903652c9e6f2429462","status":"affected","lessThan":"0ed554fd769a19ea8464bb83e9ac201002ef74ad","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/usb/dvb-usb/az6027.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.34","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.34","versionType":"semver"},{"version":"4.9.337","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.303","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.270","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.229","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.163","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.86","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.0.16","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1.2","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2","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/az6027.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/2b6a8a1a32746981044e7ab06649c804acb4068a"},{"url":"https://git.kernel.org/stable/c/c712d1ccbfb787620422b437a5b8fac0802547bd"},{"url":"https://git.kernel.org/stable/c/7abfe467cd685f5da7ecb415441e45e3e4e2baa8"},{"url":"https://git.kernel.org/stable/c/8b256d23361c51aa4b7fdb71176c1ca50966fb39"},{"url":"https://git.kernel.org/stable/c/559891d430e3f3a178040c4371ed419edbfa7d65"},{"url":"https://git.kernel.org/stable/c/210fcf64be4db82c0e190e74b5111e4eef661a7a"},{"url":"https://git.kernel.org/stable/c/6fbc44731a4665cbe92a5090e9804a388a72214b"},{"url":"https://git.kernel.org/stable/c/6b60cf73a931af34b7a0a3f467a79d9fe0df2d70"},{"url":"https://git.kernel.org/stable/c/0ed554fd769a19ea8464bb83e9ac201002ef74ad"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:16:07.161Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"4.9.337"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"4.14.303"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"4.19.270"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"5.4.229"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"5.10.163"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"5.15.86"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"6.0.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"6.1.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"6.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}