CVE-2023-53220 (GCVE-0-2023-53220)
Vulnerability from cvelistv5 – Published: 2025-09-15 14:21 – Updated: 2026-05-11 19:40
VLAI
EPSS
VEX
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)
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
8 references
Impacted products
2 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) |
guessed | |
| 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 |
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"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-06-29T22:13:46+00:00",
"cve": "CVE-2023-53220",
"id": "CVE-2023-53220",
"initial_release_date": "2023-01-01T00:00:00+00:00",
"product_status:fixed": "280",
"product_status:known_affected": "98",
"product_status:known_not_affected": "98",
"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": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-11T02:22:48Z",
"cve": "CVE-2023-53220",
"id": "CVE-2023-53220",
"initial_release_date": "2025-09-22T23:41:02Z",
"product_status:known_affected": "641",
"product_status:known_not_affected": "59",
"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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\"versions\": [{\"status\": \"affected\", \"version\": \"3.4\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.4\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.14.326\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.295\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.257\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.197\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.133\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.55\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.5.5\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.5.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/media/usb/dvb-usb-v2/az6007.c\"], \"defaultStatus\": \"affected\"}], \"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\"}], \"x_generator\": {\"engine\": 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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()\\\")\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.326\", \"versionStartIncluding\": \"3.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.295\", \"versionStartIncluding\": \"3.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.257\", \"versionStartIncluding\": \"3.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.197\", \"versionStartIncluding\": \"3.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.133\", \"versionStartIncluding\": \"3.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.55\", \"versionStartIncluding\": \"3.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.5.5\", \"versionStartIncluding\": \"3.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6\", \"versionStartIncluding\": \"3.4\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-01-05T10:18:46.044Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2023-53220\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-14T17:52:58.476Z\", \"dateReserved\": \"2025-09-15T14:19:21.845Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-09-15T14:21:49.075Z\", \"assignerShortName\": \"Linux\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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