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CVE-2023-53220 (GCVE-0-2023-53220)

Vulnerability from cvelistv5 – Published: 2025-09-15 14:21 – Updated: 2026-05-11 19:40
VLAI
Title
media: az6007: Fix null-ptr-deref in az6007_i2c_xfer()
Summary
In the Linux kernel, the following vulnerability has been resolved: media: az6007: Fix null-ptr-deref in az6007_i2c_xfer() In az6007_i2c_xfer, msg is controlled by user. When msg[i].buf is null and msg[i].len is zero, former checks on msg[i].buf would be passed. Malicious data finally reach az6007_i2c_xfer. If accessing msg[i].buf[0] without sanity check, null ptr deref would happen. We add check on msg[i].len to prevent crash. Similar commit: commit 0ed554fd769a ("media: dvb-usb: az6027: fix null-ptr-deref 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
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 17:50 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: caa1a700ed2a06a831e6a7db5d9f213fc63caee3 , < c6763fefa267f6e62595a6ac1f57815d99fc90b7 (git)
Affected: caa1a700ed2a06a831e6a7db5d9f213fc63caee3 , < adcb73f8ce9aec48b1f85223f401c1574015d8d2 (git)
Affected: caa1a700ed2a06a831e6a7db5d9f213fc63caee3 , < 991c77fe18c6f374bbf83376f8c42550aa565662 (git)
Affected: caa1a700ed2a06a831e6a7db5d9f213fc63caee3 , < a9def3e9718a4dc756f48db147d42ec41a966240 (git)
Affected: caa1a700ed2a06a831e6a7db5d9f213fc63caee3 , < 5b1ea100ad3695025969dc4693f307877fb688d6 (git)
Affected: caa1a700ed2a06a831e6a7db5d9f213fc63caee3 , < 6ab7ea4e17d6a605d05308adf8f3408924770cba (git)
Affected: caa1a700ed2a06a831e6a7db5d9f213fc63caee3 , < a1110f19d4940e4185251d072cbb0ff51486a1e7 (git)
Affected: caa1a700ed2a06a831e6a7db5d9f213fc63caee3 , < 1047f9343011f2cedc73c64829686206a7e9fc3f (git)
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Linux Linux Affected: 3.4
Unaffected: 0 , < 3.4 (semver)
Unaffected: 4.14.326 , ≤ 4.14.* (semver)
Unaffected: 4.19.295 , ≤ 4.19.* (semver)
Unaffected: 5.4.257 , ≤ 5.4.* (semver)
Unaffected: 5.10.197 , ≤ 5.10.* (semver)
Unaffected: 5.15.133 , ≤ 5.15.* (semver)
Unaffected: 6.1.55 , ≤ 6.1.* (semver)
Unaffected: 6.5.5 , ≤ 6.5.* (semver)
Unaffected: 6.6 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            ],
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            ],
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      "current_release_date": "2026-06-29T22:13:46+00:00",
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      "product_status:known_affected": "98",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: media: az6007: Fix null-ptr-deref in az6007_i2c_xfer()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53220.json",
      "version": "3"
    },
    "suse_vex": {
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      "current_release_date": "2026-09-11T02:22:48Z",
      "cve": "CVE-2023-53220",
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      "product_status:recommended": "377",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-53220",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-53220.json",
      "version": "48"
    },
    "vulnrichment": {
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              "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()\")"
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        "dateReserved": "2025-09-15T14:19:21.845Z",
        "dateUpdated": "2026-01-14T17:52:58.476Z",
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}



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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

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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.