CVE-2026-72179 (GCVE-0-2026-72179)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:53 – Updated: 2026-08-17 05:09
VLAI
Title
riscv: cacheinfo: Fix node reference leak in populate_cache_leaves
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)`.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6992 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 94f9bf118f1e294b3f2092f8bde02860f5e3ea3f , < 2560c97f63bb99b26d9f19b23a4f66ea24c9dc14 (git)
Affected: 94f9bf118f1e294b3f2092f8bde02860f5e3ea3f , < 51afb7da697b698996351740b4f39fb05ce2afd4 (git)
Affected: 94f9bf118f1e294b3f2092f8bde02860f5e3ea3f , < 880ac50b0bfae06d7ab5f1843253adfb86aa173a (git)
Affected: 94f9bf118f1e294b3f2092f8bde02860f5e3ea3f , < f322955d9a1c344ed943752f05aacea7bc22e025 (git)
Affected: 94f9bf118f1e294b3f2092f8bde02860f5e3ea3f , < 36e4843fe39ea2f17f4de6d59fba26271916c184 (git)
Affected: 94f9bf118f1e294b3f2092f8bde02860f5e3ea3f , < bf4a195f063b0a0805c1417f6aad1dd32ea48f0f (git)
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Linux Linux Affected: 5.0
Unaffected: 0 , < 5.0 (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)
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          "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)`."
        }
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        "dateUpdated": "2026-08-17T05:09:41.910Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/51afb7da697b698996351740b4f39fb05ce2afd4"
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          "url": "https://git.kernel.org/stable/c/bf4a195f063b0a0805c1417f6aad1dd32ea48f0f"
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    "dateReserved": "2026-08-09T03:40:39.910Z",
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    "state": "PUBLISHED"
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            "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",
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      "current_release_date": "2026-10-16T23:12:43+00:00",
      "cve": "CVE-2026-72179",
      "id": "CVE-2026-72179",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_not_affected": "275",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: riscv: cacheinfo: Fix node reference leak in populate_cache_leaves",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72179.json",
      "version": "3"
    }
  }
}



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