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FKIE_CVE-2026-72179

Vulnerability from fkie_nvd - Published: 2026-08-15 06:21 - Updated: 2026-08-17 06:18
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: riscv: cacheinfo: Fix node reference leak in populate_cache_leaves Currently, the while loop drops the reference to prev in each iteration. If the loop terminates early due to a break, the final of_node_put(np) correctly drops the reference to the current node. However, if the loop terminates naturally because np == NULL, calling of_node_put(np) is a no-op. This leaves the last valid node stored in prev without its reference dropped, resulting in a node reference leak. Fix this by changing the final `of_node_put(np)` to `of_node_put(prev)`.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2560c97f63bb99b26d9f19b23a4f66ea24c9dc14
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/36e4843fe39ea2f17f4de6d59fba26271916c184
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/51afb7da697b698996351740b4f39fb05ce2afd4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/880ac50b0bfae06d7ab5f1843253adfb86aa173a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bf4a195f063b0a0805c1417f6aad1dd32ea48f0f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f322955d9a1c344ed943752f05aacea7bc22e025
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/riscv/kernel/cacheinfo.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2560c97f63bb99b26d9f19b23a4f66ea24c9dc14",
              "status": "affected",
              "version": "94f9bf118f1e294b3f2092f8bde02860f5e3ea3f",
              "versionType": "git"
            },
            {
              "lessThan": "51afb7da697b698996351740b4f39fb05ce2afd4",
              "status": "affected",
              "version": "94f9bf118f1e294b3f2092f8bde02860f5e3ea3f",
              "versionType": "git"
            },
            {
              "lessThan": "880ac50b0bfae06d7ab5f1843253adfb86aa173a",
              "status": "affected",
              "version": "94f9bf118f1e294b3f2092f8bde02860f5e3ea3f",
              "versionType": "git"
            },
            {
              "lessThan": "f322955d9a1c344ed943752f05aacea7bc22e025",
              "status": "affected",
              "version": "94f9bf118f1e294b3f2092f8bde02860f5e3ea3f",
              "versionType": "git"
            },
            {
              "lessThan": "36e4843fe39ea2f17f4de6d59fba26271916c184",
              "status": "affected",
              "version": "94f9bf118f1e294b3f2092f8bde02860f5e3ea3f",
              "versionType": "git"
            },
            {
              "lessThan": "bf4a195f063b0a0805c1417f6aad1dd32ea48f0f",
              "status": "affected",
              "version": "94f9bf118f1e294b3f2092f8bde02860f5e3ea3f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/riscv/kernel/cacheinfo.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.0"
            },
            {
              "lessThan": "5.0",
              "status": "unaffected",
              "version": "0",
              "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"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: cacheinfo: Fix node reference leak in populate_cache_leaves\n\nCurrently, the while loop drops the reference to prev in each iteration.\nIf the loop terminates early due to a break, the final of_node_put(np)\ncorrectly drops the reference to the current node.\n\nHowever, if the loop terminates naturally because np == NULL, calling\nof_node_put(np) is a no-op. This leaves the last valid node stored in\nprev without its reference dropped, resulting in a node reference leak.\n\nFix this by changing the final `of_node_put(np)` to `of_node_put(prev)`."
    }
  ],
  "id": "CVE-2026-72179",
  "lastModified": "2026-08-17T06:18:18.393",
  "metrics": {},
  "published": "2026-08-15T06:21:36.180",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2560c97f63bb99b26d9f19b23a4f66ea24c9dc14"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/36e4843fe39ea2f17f4de6d59fba26271916c184"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/51afb7da697b698996351740b4f39fb05ce2afd4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/880ac50b0bfae06d7ab5f1843253adfb86aa173a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bf4a195f063b0a0805c1417f6aad1dd32ea48f0f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f322955d9a1c344ed943752f05aacea7bc22e025"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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