Vulnerability-Lookup

GHSA-HMG3-FX9R-3V68

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:

net: sungem: fix probe error cleanup

gem_init_one() calls gem_remove_one() when register_netdev() fails. gem_remove_one() unregisters and frees resources owned by the net_device, including the DMA block, MMIO mapping, PCI regions, and the net_device itself. gem_init_one() then falls through to its own cleanup labels and frees the same resources again.

Keep the register_netdev() error path in gem_init_one(): clear drvdata so PM/remove paths do not see a half-registered device, remove the NAPI instance added during probe, and let the existing cleanup labels release the resources once.

The issue was found by a local static-analysis checker for probe error paths. The reported path was manually inspected before sending this fix.

Compile-tested with CONFIG_SUNGEM=y. Runtime testing was not performed because no sungem hardware is available.

Severity

7.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72406"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:22:14Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sungem: fix probe error cleanup\n\ngem_init_one() calls gem_remove_one() when register_netdev() fails.\ngem_remove_one() unregisters and frees resources owned by the net_device,\nincluding the DMA block, MMIO mapping, PCI regions, and the net_device\nitself. gem_init_one() then falls through to its own cleanup labels and\nfrees the same resources again.\n\nKeep the register_netdev() error path in gem_init_one(): clear drvdata so\nPM/remove paths do not see a half-registered device, remove the NAPI\ninstance added during probe, and let the existing cleanup labels release\nthe resources once.\n\nThe issue was found by a local static-analysis checker for probe error\npaths. The reported path was manually inspected before sending this fix.\n\nCompile-tested with CONFIG_SUNGEM=y. Runtime testing was not performed\nbecause no sungem hardware is available.",
  "id": "GHSA-hmg3-fx9r-3v68",
  "modified": "2026-08-17T06:33:28Z",
  "published": "2026-08-15T06:32:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72406"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/331c99029a1cee1111f82f63d15b3cdebefbd341"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/36dea2f639249460d13f6ca66b2a9064187cd34d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a63eaf7605d1579cf3f551792e478cfaf5ac37d1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b15a3cc68e2450aa0edd94a74a7bdd45fcc17dd9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bc49e8746584564dba47d963d1916cc876fc6f6b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f1d04fefb0c2a2de32d9cee22cdc2088be3758d1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f3bd60b26814b7c3c57c629abb0857dfc76d214a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fb73cdc50b6755e5c3a80a195b2708a39ada0230"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-72406 (GCVE-0-2026-72406)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:56 – Updated: 2026-08-17 05:43

Title

net: sungem: fix probe error cleanup

Summary

In the Linux kernel, the following vulnerability has been resolved: net: sungem: fix probe error cleanup gem_init_one() calls gem_remove_one() when register_netdev() fails. gem_remove_one() unregisters and frees resources owned by the net_device, including the DMA block, MMIO mapping, PCI regions, and the net_device itself. gem_init_one() then falls through to its own cleanup labels and frees the same resources again. Keep the register_netdev() error path in gem_init_one(): clear drvdata so PM/remove paths do not see a half-registered device, remove the NAPI instance added during probe, and let the existing cleanup labels release the resources once. The issue was found by a local static-analysis checker for probe error paths. The reported path was manually inspected before sending this fix. Compile-tested with CONFIG_SUNGEM=y. Runtime testing was not performed because no sungem hardware is available.

Severity

7.8 (High)


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

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/f3bd60b26814b7c3c…
https://git.kernel.org/stable/c/f1d04fefb0c2a2de3…
https://git.kernel.org/stable/c/331c99029a1cee111…
https://git.kernel.org/stable/c/a63eaf7605d1579cf…
https://git.kernel.org/stable/c/fb73cdc50b6755e5c…
https://git.kernel.org/stable/c/b15a3cc68e2450aa0…
https://git.kernel.org/stable/c/bc49e8746584564db…
https://git.kernel.org/stable/c/36dea2f639249460d…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < f3bd60b26814b7c3c57c629abb0857dfc76d214a (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < f1d04fefb0c2a2de32d9cee22cdc2088be3758d1 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 331c99029a1cee1111f82f63d15b3cdebefbd341 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a63eaf7605d1579cf3f551792e478cfaf5ac37d1 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < fb73cdc50b6755e5c3a80a195b2708a39ada0230 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < b15a3cc68e2450aa0edd94a74a7bdd45fcc17dd9 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < bc49e8746584564dba47d963d1916cc876fc6f6b (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 36dea2f639249460d13f6ca66b2a9064187cd34d (git)
Linux	Linux	Affected: 2.6.12 Unaffected: 0 , < 2.6.12 (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

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{
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          "product": "Linux",
          "programFiles": [
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              "status": "unaffected",
              "version": "0",
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              "status": "unaffected",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sungem: fix probe error cleanup\n\ngem_init_one() calls gem_remove_one() when register_netdev() fails.\ngem_remove_one() unregisters and frees resources owned by the net_device,\nincluding the DMA block, MMIO mapping, PCI regions, and the net_device\nitself. gem_init_one() then falls through to its own cleanup labels and\nfrees the same resources again.\n\nKeep the register_netdev() error path in gem_init_one(): clear drvdata so\nPM/remove paths do not see a half-registered device, remove the NAPI\ninstance added during probe, and let the existing cleanup labels release\nthe resources once.\n\nThe issue was found by a local static-analysis checker for probe error\npaths. The reported path was manually inspected before sending this fix.\n\nCompile-tested with CONFIG_SUNGEM=y. Runtime testing was not performed\nbecause no sungem hardware is available."
        }
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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              "lang": "en",
              "value": "AV:L - The flaw is in sungem PCI driver probe (gem_init_one) when register_netdev() fails during gem_init_one(); it is reached via local PCI enumeration/module load/hotplug/sysfs bind, not by processing remote network traffic through the NIC.\nAC:L - An attacker can reliably force register_netdev() to fail with ENOMEM using memory exhaustion timed with sungem probe or reprobe (modprobe, PCI hotplug, or sysfs bind); no uncontrollable race or rare heap layout is required beyond attacker-driven pressure.\nPR:L - Only a basic local process is needed to exhaust memory during probe; CAP_SYS_ADMIN/CAP_SYS_MODULE for driver rebind or modprobe is commonly available to maintenance operators, and concurrent unprivileged memory pressure can trigger the failing path without init-namespace root.\nUI:N - No victim interaction (opening files, mounting filesystems, clicking prompts) is required; exploitation is driven by attacker-timed memory pressure during sungem PCI probe error cleanup without actions from other users.\nS:U - The double-free corrupts kernel heap/DMA bookkeeping within the same kernel security domain; it enables local privilege escalation but does not cross VM, container, or IOMMU boundaries on its own.\nC:H - gem_remove_one() followed by fallthrough cleanup double-frees dma_alloc_coherent memory and free_netdev(), and then dereferences freed netdev_priv(gp) in gem_put_cell/iounmap, giving UAF-class heap disclosure primitives.\nI:H - Repeated dma_free_coherent, pci_release_regions, and free_netdev on the same objects corrupts kernel heap/SLUB metadata and can be developed into arbitrary kernel writes or control-flow hijacking, not merely a one-time fault.\nA:H - The double-free and subsequent use-after-free on probe error cleanup can immediately trigger kernel BUG/WARN, oops, or panic, causing total loss of system availability on affected legacy systems using sungem hardware."
            }
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        }
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      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:43:46.309Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/bc49e8746584564dba47d963d1916cc876fc6f6b"
        },
        {
          "url": "https://git.kernel.org/stable/c/36dea2f639249460d13f6ca66b2a9064187cd34d"
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      ],
      "title": "net: sungem: fix probe error cleanup",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72406",
    "datePublished": "2026-08-15T05:56:30.225Z",
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    "dateUpdated": "2026-08-17T05:43:46.309Z",
    "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

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