Vulnerability-Lookup

GHSA-4P2P-WW9M-H8RQ

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-17 06:33

Details

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

crypto: cavium/cpt - fix DMA cleanup using wrong loop index

The sg_cleanup error path used list[i] instead of list[j] when unmapping DMA buffers, leaking successfully mapped entries and repeatedly unmapping the failed one.

Severity

10.0 (Critical)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-74279"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:22:27Z",
    "severity": "CRITICAL"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: cavium/cpt - fix DMA cleanup using wrong loop index\n\nThe sg_cleanup error path used list[i] instead of list[j] when unmapping\nDMA buffers, leaking successfully mapped entries and repeatedly unmapping\nthe failed one.",
  "id": "GHSA-4p2p-ww9m-h8rq",
  "modified": "2026-08-17T06:33:35Z",
  "published": "2026-08-15T06:32:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74279"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/23c6174e48f66fc10b998b0acdb406cb0caf5c80"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/23d3a7e896a1fe2d7a6bcb42f093948b79f8a198"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/28141f95ae93b18f9bfde953cb787fcb151fb9da"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3b8a1e1f4e4071a62b20374028744e8cc8310d48"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8afd1007ef79898a6e010eaade97097e49405fce"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9dbf173bd32d5f81b005008b682bfb50aa093455"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d319b83b97b3585550d9ae592dfa78c755b6129e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fb4d57b83356d4bd411b45ede3024e0ff42c9b5e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-74279 (GCVE-0-2026-74279)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:57 – Updated: 2026-08-17 05:45

Title

crypto: cavium/cpt - fix DMA cleanup using wrong loop index

Summary

In the Linux kernel, the following vulnerability has been resolved: crypto: cavium/cpt - fix DMA cleanup using wrong loop index The sg_cleanup error path used list[i] instead of list[j] when unmapping DMA buffers, leaking successfully mapped entries and repeatedly unmapping the failed one.

Severity

10 (Critical)


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

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/23c6174e48f66fc10…
https://git.kernel.org/stable/c/23d3a7e896a1fe2d7…
https://git.kernel.org/stable/c/28141f95ae93b18f9…
https://git.kernel.org/stable/c/8afd1007ef79898a6…
https://git.kernel.org/stable/c/3b8a1e1f4e4071a62…
https://git.kernel.org/stable/c/fb4d57b83356d4bd4…
https://git.kernel.org/stable/c/d319b83b97b358555…
https://git.kernel.org/stable/c/9dbf173bd32d5f81b…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: c694b233295b99c33dd5ac28aede9f171f5a6862 , < 23c6174e48f66fc10b998b0acdb406cb0caf5c80 (git) Affected: c694b233295b99c33dd5ac28aede9f171f5a6862 , < 23d3a7e896a1fe2d7a6bcb42f093948b79f8a198 (git) Affected: c694b233295b99c33dd5ac28aede9f171f5a6862 , < 28141f95ae93b18f9bfde953cb787fcb151fb9da (git) Affected: c694b233295b99c33dd5ac28aede9f171f5a6862 , < 8afd1007ef79898a6e010eaade97097e49405fce (git) Affected: c694b233295b99c33dd5ac28aede9f171f5a6862 , < 3b8a1e1f4e4071a62b20374028744e8cc8310d48 (git) Affected: c694b233295b99c33dd5ac28aede9f171f5a6862 , < fb4d57b83356d4bd411b45ede3024e0ff42c9b5e (git) Affected: c694b233295b99c33dd5ac28aede9f171f5a6862 , < d319b83b97b3585550d9ae592dfa78c755b6129e (git) Affected: c694b233295b99c33dd5ac28aede9f171f5a6862 , < 9dbf173bd32d5f81b005008b682bfb50aa093455 (git)
Linux	Linux	Affected: 4.11 Unaffected: 0 , < 4.11 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/crypto/cavium/cpt/cptvf_reqmanager.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "23c6174e48f66fc10b998b0acdb406cb0caf5c80",
              "status": "affected",
              "version": "c694b233295b99c33dd5ac28aede9f171f5a6862",
              "versionType": "git"
            },
            {
              "lessThan": "23d3a7e896a1fe2d7a6bcb42f093948b79f8a198",
              "status": "affected",
              "version": "c694b233295b99c33dd5ac28aede9f171f5a6862",
              "versionType": "git"
            },
            {
              "lessThan": "28141f95ae93b18f9bfde953cb787fcb151fb9da",
              "status": "affected",
              "version": "c694b233295b99c33dd5ac28aede9f171f5a6862",
              "versionType": "git"
            },
            {
              "lessThan": "8afd1007ef79898a6e010eaade97097e49405fce",
              "status": "affected",
              "version": "c694b233295b99c33dd5ac28aede9f171f5a6862",
              "versionType": "git"
            },
            {
              "lessThan": "3b8a1e1f4e4071a62b20374028744e8cc8310d48",
              "status": "affected",
              "version": "c694b233295b99c33dd5ac28aede9f171f5a6862",
              "versionType": "git"
            },
            {
              "lessThan": "fb4d57b83356d4bd411b45ede3024e0ff42c9b5e",
              "status": "affected",
              "version": "c694b233295b99c33dd5ac28aede9f171f5a6862",
              "versionType": "git"
            },
            {
              "lessThan": "d319b83b97b3585550d9ae592dfa78c755b6129e",
              "status": "affected",
              "version": "c694b233295b99c33dd5ac28aede9f171f5a6862",
              "versionType": "git"
            },
            {
              "lessThan": "9dbf173bd32d5f81b005008b682bfb50aa093455",
              "status": "affected",
              "version": "c694b233295b99c33dd5ac28aede9f171f5a6862",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/crypto/cavium/cpt/cptvf_reqmanager.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.11"
            },
            {
              "lessThan": "4.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.261",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.212",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.178",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.145",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.97",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.40",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: cavium/cpt - fix DMA cleanup using wrong loop index\n\nThe sg_cleanup error path used list[i] instead of list[j] when unmapping\nDMA buffers, leaking successfully mapped entries and repeatedly unmapping\nthe failed one."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 10,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - On Cavium Thunder appliances the CPT VF skcipher driver is selected for in-kernel crypto on network-facing workloads (IPsec/xfrm ESP decrypt, NFS/RPC GSS-Kerberos), so remote peers can drive setup_sgio_components() by sending traffic that triggers hardware-accelerated AES/DES operations.\nAC:L - An attacker can reliably force the error path by fragmenting crypto buffers to raise incnt/outcnt and flooding concurrent encrypt/decrypt requests to exhaust IOMMU IOVAs, causing dma_map_single() to fail mid-loop; no uncontrollable victim state or race is required.\nPR:N - Exploitation requires no root or capabilities on the victim host; remote network peers sending IPsec or authenticated RPC traffic, or any local process using the kernel crypto API via AF_ALG sockets, can trigger the faulty DMA cleanup without admin privileges.\nUI:N - Exploitation is fully attacker-driven through automated network traffic or programmatic crypto requests and does not require any victim user action such as opening files or mounting filesystems.\nS:C - Leaked DMA mappings let the CPT PCI function continue bus-mastering kernel pages after software teardown, bypassing intended kernel DMA lifecycle and IOMMU-enforced device isolation boundaries when stale mappings target freed or repurposed memory.\nC:H - Unmapping failures leave active DMA translations while dma_addr metadata is cleared, allowing the CPT hardware to read kernel memory from freed or reallocated pages, providing a memory-corruption primitive that can disclose sensitive data.\nI:H - Stale bidirectional DMA mappings combined with bogus unmaps on DMA_MAPPING_ERROR can corrupt IOMMU state and let the accelerator write into kernel pages no longer owned by the request, enabling control of kernel memory contents.\nA:H - Repeated dma_unmap_single() on DMA_MAPPING_ERROR triggers WARN_ON in iommu_dma_unmap_phys, and accumulating leaked IOMMU mappings can exhaust DMA resources or panic the kernel during subsequent crypto operations."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:45:20.085Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/23c6174e48f66fc10b998b0acdb406cb0caf5c80"
        },
        {
          "url": "https://git.kernel.org/stable/c/23d3a7e896a1fe2d7a6bcb42f093948b79f8a198"
        },
        {
          "url": "https://git.kernel.org/stable/c/28141f95ae93b18f9bfde953cb787fcb151fb9da"
        },
        {
          "url": "https://git.kernel.org/stable/c/8afd1007ef79898a6e010eaade97097e49405fce"
        },
        {
          "url": "https://git.kernel.org/stable/c/3b8a1e1f4e4071a62b20374028744e8cc8310d48"
        },
        {
          "url": "https://git.kernel.org/stable/c/fb4d57b83356d4bd411b45ede3024e0ff42c9b5e"
        },
        {
          "url": "https://git.kernel.org/stable/c/d319b83b97b3585550d9ae592dfa78c755b6129e"
        },
        {
          "url": "https://git.kernel.org/stable/c/9dbf173bd32d5f81b005008b682bfb50aa093455"
        }
      ],
      "title": "crypto: cavium/cpt - fix DMA cleanup using wrong loop index",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74279",
    "datePublished": "2026-08-15T05:57:50.131Z",
    "dateReserved": "2026-08-15T05:44:03.880Z",
    "dateUpdated": "2026-08-17T05:45:20.085Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Action not permitted

GHSA-4P2P-WW9M-H8RQ

CVE-2026-74279 (GCVE-0-2026-74279)

Tags

Sightings

Nomenclature