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CVE-2023-53356 (GCVE-0-2023-53356)

Vulnerability from cvelistv5 – Published: 2025-09-17 14:56 – Updated: 2026-05-11 19:43
VLAI
Title
usb: gadget: u_serial: Add null pointer check in gserial_suspend
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: u_serial: Add null pointer check in gserial_suspend Consider a case where gserial_disconnect has already cleared gser->ioport. And if gserial_suspend gets called afterwards, it will lead to accessing of gser->ioport and thus causing null pointer dereference. Avoid this by adding a null pointer check. Added a static spinlock to prevent gser->ioport from becoming null after the newly added null pointer check.
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 18:42 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: aba3a8d01d623a5efef48ab8e78752d58d4c90c3 , < 2788a3553f7497075653210b42e2aeb6ba95e28e (git)
Affected: aba3a8d01d623a5efef48ab8e78752d58d4c90c3 , < a8ea7ed644cbf6314b5b0136b5398754b549fb8f (git)
Affected: aba3a8d01d623a5efef48ab8e78752d58d4c90c3 , < e60a827ac074ce6bd58305fe5a86afab5fce6a04 (git)
Affected: aba3a8d01d623a5efef48ab8e78752d58d4c90c3 , < 374447e3367767156405bedd230c5d391f4b7962 (git)
Affected: aba3a8d01d623a5efef48ab8e78752d58d4c90c3 , < 2f6ecb89fe8feb2b60a53325b0eeb9866d88909a (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.8
Unaffected: 0 , < 5.8 (semver)
Unaffected: 5.10.188 , ≤ 5.10.* (semver)
Unaffected: 5.15.121 , ≤ 5.15.* (semver)
Unaffected: 6.1.39 , ≤ 6.1.* (semver)
Unaffected: 6.4.4 , ≤ 6.4.* (semver)
Unaffected: 6.5 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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    },
    "vulnrichment": {
      "containers": "{\"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-2023-53356\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-14T18:42:52.369730Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-476\", \"description\": \"CWE-476 NULL Pointer Dereference\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-01-14T18:42:47.851Z\"}}], \"cna\": {\"title\": \"usb: gadget: u_serial: Add null pointer check in gserial_suspend\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"aba3a8d01d623a5efef48ab8e78752d58d4c90c3\", \"lessThan\": \"2788a3553f7497075653210b42e2aeb6ba95e28e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"aba3a8d01d623a5efef48ab8e78752d58d4c90c3\", \"lessThan\": \"a8ea7ed644cbf6314b5b0136b5398754b549fb8f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"aba3a8d01d623a5efef48ab8e78752d58d4c90c3\", \"lessThan\": \"e60a827ac074ce6bd58305fe5a86afab5fce6a04\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"aba3a8d01d623a5efef48ab8e78752d58d4c90c3\", \"lessThan\": \"374447e3367767156405bedd230c5d391f4b7962\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"aba3a8d01d623a5efef48ab8e78752d58d4c90c3\", \"lessThan\": \"2f6ecb89fe8feb2b60a53325b0eeb9866d88909a\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/usb/gadget/function/u_serial.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.8\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.8\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.188\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.121\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.39\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.4.4\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.4.*\"}, {\"status\": \"unaffected\", \"version\": \"6.5\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/usb/gadget/function/u_serial.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/2788a3553f7497075653210b42e2aeb6ba95e28e\"}, {\"url\": \"https://git.kernel.org/stable/c/a8ea7ed644cbf6314b5b0136b5398754b549fb8f\"}, {\"url\": \"https://git.kernel.org/stable/c/e60a827ac074ce6bd58305fe5a86afab5fce6a04\"}, {\"url\": \"https://git.kernel.org/stable/c/374447e3367767156405bedd230c5d391f4b7962\"}, {\"url\": \"https://git.kernel.org/stable/c/2f6ecb89fe8feb2b60a53325b0eeb9866d88909a\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nusb: gadget: u_serial: Add null pointer check in gserial_suspend\\n\\nConsider a case where gserial_disconnect has already cleared\\ngser-\u003eioport. And if gserial_suspend gets called afterwards,\\nit will lead to accessing of gser-\u003eioport and thus causing\\nnull pointer dereference.\\n\\nAvoid this by adding a null pointer check. Added a static\\nspinlock to prevent gser-\u003eioport from becoming null after\\nthe newly added null pointer check.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.188\", \"versionStartIncluding\": \"5.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.121\", \"versionStartIncluding\": \"5.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.39\", \"versionStartIncluding\": \"5.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.4.4\", \"versionStartIncluding\": \"5.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.5\", \"versionStartIncluding\": \"5.8\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T19:43:21.819Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-53356\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T19:43:21.819Z\", \"dateReserved\": \"2025-09-16T16:08:59.567Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-09-17T14:56:46.113Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.