Vulnerability-Lookup

GHSA-HHMC-QRCV-X7HV

Vulnerability from github – Published: 2026-07-24 18:31 – Updated: 2026-08-12 21:31

Details

In the Linux kernel, the following vulnerability has been resolved:

tty: serial: pch_uart: add check for dma_alloc_coherent()

Add a check for dma_alloc_coherent() failure to prevent a potential NULL pointer dereference in dma_handle_rx(). Properly release DMA channels and the PCI device reference using a goto ladder if the allocation fails.

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-64234"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-24T16:16:52Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: serial: pch_uart: add check for dma_alloc_coherent()\n\nAdd a check for dma_alloc_coherent() failure to prevent a potential\nNULL pointer dereference in dma_handle_rx(). Properly release DMA\nchannels and the PCI device reference using a goto ladder if the\nallocation fails.",
  "id": "GHSA-hhmc-qrcv-x7hv",
  "modified": "2026-08-12T21:31:08Z",
  "published": "2026-07-24T18:31:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64234"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5f2e2a240dc1846e049bc67e9c3cdf5b031d08bf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/66f8bfea055b23719b4fd6ce207c44de37d82a59"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6dd5c0ea139b586ad5a091677056dafd405cfe82"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6fe472c1bbbe238e91141f7cabc1226e96a60d43"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/760df81763b391bb5f0dcb0b7597b736da753ae4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d846df2dfbc2469a688833b4cc4f8aa80672bde8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d8d53a343ebe74274ca17b1e1993042e99f8c863"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/daea997bb244aeb50cbb2e5e075fb446a6cf068f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-64234 (GCVE-0-2026-64234)

Vulnerability from cvelistv5 – Published: 2026-07-24 15:27 – Updated: 2026-07-24 15:27

Title

tty: serial: pch_uart: add check for dma_alloc_coherent()

Summary

In the Linux kernel, the following vulnerability has been resolved: tty: serial: pch_uart: add check for dma_alloc_coherent() Add a check for dma_alloc_coherent() failure to prevent a potential NULL pointer dereference in dma_handle_rx(). Properly release DMA channels and the PCI device reference using a goto ladder if the allocation fails.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/760df81763b391bb5…
https://git.kernel.org/stable/c/5f2e2a240dc1846e0…
https://git.kernel.org/stable/c/daea997bb244aeb50…
https://git.kernel.org/stable/c/6dd5c0ea139b586ad…
https://git.kernel.org/stable/c/d846df2dfbc2469a6…
https://git.kernel.org/stable/c/66f8bfea055b23719…
https://git.kernel.org/stable/c/d8d53a343ebe74274…
https://git.kernel.org/stable/c/6fe472c1bbbe238e9…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 3c6a483275f47a2ef7119309ad3d791c10cf30da , < 760df81763b391bb5f0dcb0b7597b736da753ae4 (git) Affected: 3c6a483275f47a2ef7119309ad3d791c10cf30da , < 5f2e2a240dc1846e049bc67e9c3cdf5b031d08bf (git) Affected: 3c6a483275f47a2ef7119309ad3d791c10cf30da , < daea997bb244aeb50cbb2e5e075fb446a6cf068f (git) Affected: 3c6a483275f47a2ef7119309ad3d791c10cf30da , < 6dd5c0ea139b586ad5a091677056dafd405cfe82 (git) Affected: 3c6a483275f47a2ef7119309ad3d791c10cf30da , < d846df2dfbc2469a688833b4cc4f8aa80672bde8 (git) Affected: 3c6a483275f47a2ef7119309ad3d791c10cf30da , < 66f8bfea055b23719b4fd6ce207c44de37d82a59 (git) Affected: 3c6a483275f47a2ef7119309ad3d791c10cf30da , < d8d53a343ebe74274ca17b1e1993042e99f8c863 (git) Affected: 3c6a483275f47a2ef7119309ad3d791c10cf30da , < 6fe472c1bbbe238e91141f7cabc1226e96a60d43 (git)
Linux	Linux	Affected: 2.6.38 Unaffected: 0 , < 2.6.38 (semver) Unaffected: 5.10.259 , ≤ 5.10.* (semver) Unaffected: 5.15.210 , ≤ 5.15.* (semver) Unaffected: 6.1.176 , ≤ 6.1.* (semver) Unaffected: 6.6.143 , ≤ 6.6.* (semver) Unaffected: 6.12.93 , ≤ 6.12.* (semver) Unaffected: 6.18.35 , ≤ 6.18.* (semver) Unaffected: 7.0.12 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/tty/serial/pch_uart.c"
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            },
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              "status": "unaffected",
              "version": "0",
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              "status": "unaffected",
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              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.210",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.176",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
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              "versionType": "semver"
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              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
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            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.35",
              "versionType": "semver"
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              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
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          "nodes": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: serial: pch_uart: add check for dma_alloc_coherent()\n\nAdd a check for dma_alloc_coherent() failure to prevent a potential\nNULL pointer dereference in dma_handle_rx(). Properly release DMA\nchannels and the PCI device reference using a goto ladder if the\nallocation fails."
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    "datePublished": "2026-07-24T15:27:40.263Z",
    "dateReserved": "2026-07-19T15:36:31.771Z",
    "dateUpdated": "2026-07-24T15:27:40.263Z",
    "state": "PUBLISHED"
  },
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}

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.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.