github - ghsa-hcpj-xwwg-jgh9

GHSA-HCPJ-XWWG-JGH9

Vulnerability from github – Published: 2025-12-24 12:30 – Updated: 2025-12-24 12:30

Details

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

bpf: fix a memory leak in the LRU and LRU_PERCPU hash maps

The LRU and LRU_PERCPU maps allocate a new element on update before locking the target hash table bucket. Right after that the maps try to lock the bucket. If this fails, then maps return -EBUSY to the caller without releasing the allocated element. This makes the element untracked: it doesn't belong to either of free lists, and it doesn't belong to the hash table, so can't be re-used; this eventually leads to the permanent -ENOMEM on LRU map updates, which is unexpected. Fix this by returning the element to the local free list if bucket locking fails.

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{
  "affected": [],
  "aliases": [
    "CVE-2023-54033"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-24T11:15:56Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: fix a memory leak in the LRU and LRU_PERCPU hash maps\n\nThe LRU and LRU_PERCPU maps allocate a new element on update before locking the\ntarget hash table bucket. Right after that the maps try to lock the bucket.\nIf this fails, then maps return -EBUSY to the caller without releasing the\nallocated element. This makes the element untracked: it doesn\u0027t belong to\neither of free lists, and it doesn\u0027t belong to the hash table, so can\u0027t be\nre-used; this eventually leads to the permanent -ENOMEM on LRU map updates,\nwhich is unexpected. Fix this by returning the element to the local free list\nif bucket locking fails.",
  "id": "GHSA-hcpj-xwwg-jgh9",
  "modified": "2025-12-24T12:30:28Z",
  "published": "2025-12-24T12:30:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-54033"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1a9e80f757bbb1562d82e350afce2bb2f712cc3d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/79ea1a12fb9a8275b6e19d4ca625dd872dedcbb9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/965e9cccbe6b9c7b379908cebcb5e3a47f20dd5e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b34ffb0c6d23583830f9327864b9c1f486003305"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2023-54033 (GCVE-0-2023-54033)

Vulnerability from cvelistv5 – Published: 2025-12-24 10:56 – Updated: 2025-12-24 10:56

Title

bpf: fix a memory leak in the LRU and LRU_PERCPU hash maps

Summary

In the Linux kernel, the following vulnerability has been resolved: bpf: fix a memory leak in the LRU and LRU_PERCPU hash maps The LRU and LRU_PERCPU maps allocate a new element on update before locking the target hash table bucket. Right after that the maps try to lock the bucket. If this fails, then maps return -EBUSY to the caller without releasing the allocated element. This makes the element untracked: it doesn't belong to either of free lists, and it doesn't belong to the hash table, so can't be re-used; this eventually leads to the permanent -ENOMEM on LRU map updates, which is unexpected. Fix this by returning the element to the local free list if bucket locking fails.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/79ea1a12fb9a8275b…
	https://git.kernel.org/stable/c/1a9e80f757bbb1562…
	https://git.kernel.org/stable/c/965e9cccbe6b9c7b3…
	https://git.kernel.org/stable/c/b34ffb0c6d2358383…

Impacted products

Vendor

Product

Version

Linux

Affected: 20b6cc34ea74b6a84599c1f8a70f3315b56a1883 , < 79ea1a12fb9a8275b6e19d4ca625dd872dedcbb9 (git)
Affected: 20b6cc34ea74b6a84599c1f8a70f3315b56a1883 , < 1a9e80f757bbb1562d82e350afce2bb2f712cc3d (git)
Affected: 20b6cc34ea74b6a84599c1f8a70f3315b56a1883 , < 965e9cccbe6b9c7b379908cebcb5e3a47f20dd5e (git)
Affected: 20b6cc34ea74b6a84599c1f8a70f3315b56a1883 , < b34ffb0c6d23583830f9327864b9c1f486003305 (git)

Linux

Affected: 5.11
Unaffected: 0 , < 5.11 (semver)
Unaffected: 5.15.115 , ≤ 5.15.* (semver)
Unaffected: 6.1.31 , ≤ 6.1.* (semver)
Unaffected: 6.3.5 , ≤ 6.3.* (semver)
Unaffected: 6.4 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/hashtab.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
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              "versionType": "git"
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          "vendor": "Linux",
          "versions": [
            {
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              "version": "5.11"
            },
            {
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              "version": "0",
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            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.31",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.3.*",
              "status": "unaffected",
              "version": "6.3.5",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.4",
              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.115",
                  "versionStartIncluding": "5.11",
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                },
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                },
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: fix a memory leak in the LRU and LRU_PERCPU hash maps\n\nThe LRU and LRU_PERCPU maps allocate a new element on update before locking the\ntarget hash table bucket. Right after that the maps try to lock the bucket.\nIf this fails, then maps return -EBUSY to the caller without releasing the\nallocated element. This makes the element untracked: it doesn\u0027t belong to\neither of free lists, and it doesn\u0027t belong to the hash table, so can\u0027t be\nre-used; this eventually leads to the permanent -ENOMEM on LRU map updates,\nwhich is unexpected. Fix this by returning the element to the local free list\nif bucket locking fails."
        }
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        "dateUpdated": "2025-12-24T10:56:00.579Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2023-54033",
    "datePublished": "2025-12-24T10:56:00.579Z",
    "dateReserved": "2025-12-24T10:53:46.180Z",
    "dateUpdated": "2025-12-24T10:56:00.579Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-HCPJ-XWWG-JGH9

CVE-2023-54033 (GCVE-0-2023-54033)

Tags

Sightings

Nomenclature