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CVE-2022-50272 (GCVE-0-2022-50272)

Vulnerability from cvelistv5 – Published: 2025-09-15 14:21 – Updated: 2026-05-11 19:16
VLAI
Title
media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()
Summary
In the Linux kernel, the following vulnerability has been resolved: media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer() Wei Chen reports a kernel bug as blew: general protection fault, probably for non-canonical address KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] ... Call Trace: <TASK> __i2c_transfer+0x77e/0x1930 drivers/i2c/i2c-core-base.c:2109 i2c_transfer+0x1d5/0x3d0 drivers/i2c/i2c-core-base.c:2170 i2cdev_ioctl_rdwr+0x393/0x660 drivers/i2c/i2c-dev.c:297 i2cdev_ioctl+0x75d/0x9f0 drivers/i2c/i2c-dev.c:458 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fd834a8bded In az6027_i2c_xfer(), if msg[i].addr is 0x99, a null-ptr-deref will caused when accessing msg[i].buf. For msg[i].len is 0 and msg[i].buf is null. Fix this by checking msg[i].len in az6027_i2c_xfer().
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 76f9a820c8672ada12ffa0903652c9e6f2429462 , < 2b6a8a1a32746981044e7ab06649c804acb4068a (git)
Affected: 76f9a820c8672ada12ffa0903652c9e6f2429462 , < c712d1ccbfb787620422b437a5b8fac0802547bd (git)
Affected: 76f9a820c8672ada12ffa0903652c9e6f2429462 , < 7abfe467cd685f5da7ecb415441e45e3e4e2baa8 (git)
Affected: 76f9a820c8672ada12ffa0903652c9e6f2429462 , < 8b256d23361c51aa4b7fdb71176c1ca50966fb39 (git)
Affected: 76f9a820c8672ada12ffa0903652c9e6f2429462 , < 559891d430e3f3a178040c4371ed419edbfa7d65 (git)
Affected: 76f9a820c8672ada12ffa0903652c9e6f2429462 , < 210fcf64be4db82c0e190e74b5111e4eef661a7a (git)
Affected: 76f9a820c8672ada12ffa0903652c9e6f2429462 , < 6fbc44731a4665cbe92a5090e9804a388a72214b (git)
Affected: 76f9a820c8672ada12ffa0903652c9e6f2429462 , < 6b60cf73a931af34b7a0a3f467a79d9fe0df2d70 (git)
Affected: 76f9a820c8672ada12ffa0903652c9e6f2429462 , < 0ed554fd769a19ea8464bb83e9ac201002ef74ad (git)
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Linux Linux Affected: 2.6.34
Unaffected: 0 , < 2.6.34 (semver)
Unaffected: 4.9.337 , ≤ 4.9.* (semver)
Unaffected: 4.14.303 , ≤ 4.14.* (semver)
Unaffected: 4.19.270 , ≤ 4.19.* (semver)
Unaffected: 5.4.229 , ≤ 5.4.* (semver)
Unaffected: 5.10.163 , ≤ 5.10.* (semver)
Unaffected: 5.15.86 , ≤ 5.15.* (semver)
Unaffected: 6.0.16 , ≤ 6.0.* (semver)
Unaffected: 6.1.2 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
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          "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\u003cTASK\u003e\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()."
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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\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/media/usb/dvb-usb/az6027.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"76f9a820c8672ada12ffa0903652c9e6f2429462\",\"lessThan\":\"2b6a8a1a32746981044e7ab06649c804acb4068a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"76f9a820c8672ada12ffa0903652c9e6f2429462\",\"lessThan\":\"c712d1ccbfb787620422b437a5b8fac0802547bd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"76f9a820c8672ada12ffa0903652c9e6f2429462\",\"lessThan\":\"7abfe467cd685f5da7ecb415441e45e3e4e2baa8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"76f9a820c8672ada12ffa0903652c9e6f2429462\",\"lessThan\":\"8b256d23361c51aa4b7fdb71176c1ca50966fb39\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"76f9a820c8672ada12ffa0903652c9e6f2429462\",\"lessThan\":\"559891d430e3f3a178040c4371ed419edbfa7d65\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"76f9a820c8672ada12ffa0903652c9e6f2429462\",\"lessThan\":\"210fcf64be4db82c0e190e74b5111e4eef661a7a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"76f9a820c8672ada12ffa0903652c9e6f2429462\",\"lessThan\":\"6fbc44731a4665cbe92a5090e9804a388a72214b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"76f9a820c8672ada12ffa0903652c9e6f2429462\",\"lessThan\":\"6b60cf73a931af34b7a0a3f467a79d9fe0df2d70\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"76f9a820c8672ada12ffa0903652c9e6f2429462\",\"lessThan\":\"0ed554fd769a19ea8464bb83e9ac201002ef74ad\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/media/usb/dvb-usb/az6027.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.34\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.34\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.9.337\",\"lessThanOrEqual\":\"4.9.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.14.303\",\"lessThanOrEqual\":\"4.14.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.19.270\",\"lessThanOrEqual\":\"4.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.229\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.163\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.86\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.0.16\",\"lessThanOrEqual\":\"6.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.2\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.6.34\",\"versionEndExcluding\":\"4.9.337\",\"matchCriteriaId\":\"E12202E5-9E5A-4DBA-B0BB-3D529759D6EA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.10\",\"versionEndExcluding\":\"4.14.303\",\"matchCriteriaId\":\"1E7450AD-4739-46F0-B81B-C02E7B35A97B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.15\",\"versionEndExcluding\":\"4.19.270\",\"matchCriteriaId\":\"AE8904A3-99BE-4E49-9682-1F90A6373F4F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.229\",\"matchCriteriaId\":\"A0C0D95E-414A-445E-941B-3EF6A4D3A093\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.163\",\"matchCriteriaId\":\"D05D31FC-BD74-4F9E-B1D8-9CED62BE6F65\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.86\",\"matchCriteriaId\":\"47237296-55D1-4ED4-8075-D00FC85A61EE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.0.16\",\"matchCriteriaId\":\"C720A569-3D93-4D77-95F6-E2B3A3267D9F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.1\",\"versionEndExcluding\":\"6.1.2\",\"matchCriteriaId\":\"77239F4B-6BB2-4B9E-A654-36A52396116C\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0ed554fd769a19ea8464bb83e9ac201002ef74ad\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/210fcf64be4db82c0e190e74b5111e4eef661a7a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2b6a8a1a32746981044e7ab06649c804acb4068a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/559891d430e3f3a178040c4371ed419edbfa7d65\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6b60cf73a931af34b7a0a3f467a79d9fe0df2d70\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6fbc44731a4665cbe92a5090e9804a388a72214b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7abfe467cd685f5da7ecb415441e45e3e4e2baa8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8b256d23361c51aa4b7fdb71176c1ca50966fb39\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c712d1ccbfb787620422b437a5b8fac0802547bd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-21T18:45:04+00:00",
      "cve": "CVE-2022-50272",
      "id": "CVE-2022-50272",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "129",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50272.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T01:25:10Z",
      "cve": "CVE-2022-50272",
      "id": "CVE-2022-50272",
      "initial_release_date": "2025-09-16T23:34:41Z",
      "product_status:known_affected": "147",
      "product_status:known_not_affected": "170",
      "product_status:recommended": "316",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-50272",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50272.json",
      "version": "48"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.