Vulnerability-Lookup

GHSA-M6C5-JHRW-6658

Vulnerability from github – Published: 2025-05-01 15:31 – Updated: 2025-11-07 18:30

Details

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

perf/x86/amd/uncore: Fix memory leak for events array

When a CPU comes online, the per-CPU NB and LLC uncore contexts are freed but not the events array within the context structure. This causes a memory leak as identified by the kmemleak detector.

[...] unreferenced object 0xffff8c5944b8e320 (size 32): comm "swapper/0", pid 1, jiffies 4294670387 (age 151.072s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000000759fb79>] amd_uncore_cpu_up_prepare+0xaf/0x230 [<00000000ddc9e126>] cpuhp_invoke_callback+0x2cf/0x470 [<0000000093e727d4>] cpuhp_issue_call+0x14d/0x170 [<0000000045464d54>] __cpuhp_setup_state_cpuslocked+0x11e/0x330 [<0000000069f67cbd>] __cpuhp_setup_state+0x6b/0x110 [<0000000015365e0f>] amd_uncore_init+0x260/0x321 [<00000000089152d2>] do_one_initcall+0x3f/0x1f0 [<000000002d0bd18d>] kernel_init_freeable+0x1ca/0x212 [<0000000030be8dde>] kernel_init+0x11/0x120 [<0000000059709e59>] ret_from_fork+0x22/0x30 unreferenced object 0xffff8c5944b8dd40 (size 64): comm "swapper/0", pid 1, jiffies 4294670387 (age 151.072s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000306efe8b>] amd_uncore_cpu_up_prepare+0x183/0x230 [<00000000ddc9e126>] cpuhp_invoke_callback+0x2cf/0x470 [<0000000093e727d4>] cpuhp_issue_call+0x14d/0x170 [<0000000045464d54>] __cpuhp_setup_state_cpuslocked+0x11e/0x330 [<0000000069f67cbd>] __cpuhp_setup_state+0x6b/0x110 [<0000000015365e0f>] amd_uncore_init+0x260/0x321 [<00000000089152d2>] do_one_initcall+0x3f/0x1f0 [<000000002d0bd18d>] kernel_init_freeable+0x1ca/0x212 [<0000000030be8dde>] kernel_init+0x11/0x120 [<0000000059709e59>] ret_from_fork+0x22/0x30 [...]

Fix the problem by freeing the events array before freeing the uncore context.

Severity

5.5 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49784"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-401"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-05-01T15:16:01Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf/x86/amd/uncore: Fix memory leak for events array\n\nWhen a CPU comes online, the per-CPU NB and LLC uncore contexts are\nfreed but not the events array within the context structure. This\ncauses a memory leak as identified by the kmemleak detector.\n\n  [...]\n  unreferenced object 0xffff8c5944b8e320 (size 32):\n    comm \"swapper/0\", pid 1, jiffies 4294670387 (age 151.072s)\n    hex dump (first 32 bytes):\n      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    backtrace:\n      [\u003c000000000759fb79\u003e] amd_uncore_cpu_up_prepare+0xaf/0x230\n      [\u003c00000000ddc9e126\u003e] cpuhp_invoke_callback+0x2cf/0x470\n      [\u003c0000000093e727d4\u003e] cpuhp_issue_call+0x14d/0x170\n      [\u003c0000000045464d54\u003e] __cpuhp_setup_state_cpuslocked+0x11e/0x330\n      [\u003c0000000069f67cbd\u003e] __cpuhp_setup_state+0x6b/0x110\n      [\u003c0000000015365e0f\u003e] amd_uncore_init+0x260/0x321\n      [\u003c00000000089152d2\u003e] do_one_initcall+0x3f/0x1f0\n      [\u003c000000002d0bd18d\u003e] kernel_init_freeable+0x1ca/0x212\n      [\u003c0000000030be8dde\u003e] kernel_init+0x11/0x120\n      [\u003c0000000059709e59\u003e] ret_from_fork+0x22/0x30\n  unreferenced object 0xffff8c5944b8dd40 (size 64):\n    comm \"swapper/0\", pid 1, jiffies 4294670387 (age 151.072s)\n    hex dump (first 32 bytes):\n      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    backtrace:\n      [\u003c00000000306efe8b\u003e] amd_uncore_cpu_up_prepare+0x183/0x230\n      [\u003c00000000ddc9e126\u003e] cpuhp_invoke_callback+0x2cf/0x470\n      [\u003c0000000093e727d4\u003e] cpuhp_issue_call+0x14d/0x170\n      [\u003c0000000045464d54\u003e] __cpuhp_setup_state_cpuslocked+0x11e/0x330\n      [\u003c0000000069f67cbd\u003e] __cpuhp_setup_state+0x6b/0x110\n      [\u003c0000000015365e0f\u003e] amd_uncore_init+0x260/0x321\n      [\u003c00000000089152d2\u003e] do_one_initcall+0x3f/0x1f0\n      [\u003c000000002d0bd18d\u003e] kernel_init_freeable+0x1ca/0x212\n      [\u003c0000000030be8dde\u003e] kernel_init+0x11/0x120\n      [\u003c0000000059709e59\u003e] ret_from_fork+0x22/0x30\n  [...]\n\nFix the problem by freeing the events array before freeing the uncore\ncontext.",
  "id": "GHSA-m6c5-jhrw-6658",
  "modified": "2025-11-07T18:30:25Z",
  "published": "2025-05-01T15:31:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49784"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bdfe34597139cfcecd47a2eb97fea44d77157491"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f75be9885d49e3717de962345c4572ddab52b178"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2022-49784 (GCVE-0-2022-49784)

Vulnerability from cvelistv5 – Published: 2025-05-01 14:09 – Updated: 2026-05-11 19:06

Title

perf/x86/amd/uncore: Fix memory leak for events array

Summary

In the Linux kernel, the following vulnerability has been resolved: perf/x86/amd/uncore: Fix memory leak for events array When a CPU comes online, the per-CPU NB and LLC uncore contexts are freed but not the events array within the context structure. This causes a memory leak as identified by the kmemleak detector. [...] unreferenced object 0xffff8c5944b8e320 (size 32): comm "swapper/0", pid 1, jiffies 4294670387 (age 151.072s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000000759fb79>] amd_uncore_cpu_up_prepare+0xaf/0x230 [<00000000ddc9e126>] cpuhp_invoke_callback+0x2cf/0x470 [<0000000093e727d4>] cpuhp_issue_call+0x14d/0x170 [<0000000045464d54>] __cpuhp_setup_state_cpuslocked+0x11e/0x330 [<0000000069f67cbd>] __cpuhp_setup_state+0x6b/0x110 [<0000000015365e0f>] amd_uncore_init+0x260/0x321 [<00000000089152d2>] do_one_initcall+0x3f/0x1f0 [<000000002d0bd18d>] kernel_init_freeable+0x1ca/0x212 [<0000000030be8dde>] kernel_init+0x11/0x120 [<0000000059709e59>] ret_from_fork+0x22/0x30 unreferenced object 0xffff8c5944b8dd40 (size 64): comm "swapper/0", pid 1, jiffies 4294670387 (age 151.072s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000306efe8b>] amd_uncore_cpu_up_prepare+0x183/0x230 [<00000000ddc9e126>] cpuhp_invoke_callback+0x2cf/0x470 [<0000000093e727d4>] cpuhp_issue_call+0x14d/0x170 [<0000000045464d54>] __cpuhp_setup_state_cpuslocked+0x11e/0x330 [<0000000069f67cbd>] __cpuhp_setup_state+0x6b/0x110 [<0000000015365e0f>] amd_uncore_init+0x260/0x321 [<00000000089152d2>] do_one_initcall+0x3f/0x1f0 [<000000002d0bd18d>] kernel_init_freeable+0x1ca/0x212 [<0000000030be8dde>] kernel_init+0x11/0x120 [<0000000059709e59>] ret_from_fork+0x22/0x30 [...] Fix the problem by freeing the events array before freeing the uncore context.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/f75be9885d49e3717…
https://git.kernel.org/stable/c/bdfe34597139cfcec…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 39621c5808f5dda75d03dc4b2d4d2b13a5a1c34b , < f75be9885d49e3717de962345c4572ddab52b178 (git) Affected: 39621c5808f5dda75d03dc4b2d4d2b13a5a1c34b , < bdfe34597139cfcecd47a2eb97fea44d77157491 (git)
Linux	Linux	Affected: 6.0 Unaffected: 0 , < 6.0 (semver) Unaffected: 6.0.10 , ≤ 6.0.* (semver) Unaffected: 6.1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/events/amd/uncore.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f75be9885d49e3717de962345c4572ddab52b178",
              "status": "affected",
              "version": "39621c5808f5dda75d03dc4b2d4d2b13a5a1c34b",
              "versionType": "git"
            },
            {
              "lessThan": "bdfe34597139cfcecd47a2eb97fea44d77157491",
              "status": "affected",
              "version": "39621c5808f5dda75d03dc4b2d4d2b13a5a1c34b",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/events/amd/uncore.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.0"
            },
            {
              "lessThan": "6.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.10",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf/x86/amd/uncore: Fix memory leak for events array\n\nWhen a CPU comes online, the per-CPU NB and LLC uncore contexts are\nfreed but not the events array within the context structure. This\ncauses a memory leak as identified by the kmemleak detector.\n\n  [...]\n  unreferenced object 0xffff8c5944b8e320 (size 32):\n    comm \"swapper/0\", pid 1, jiffies 4294670387 (age 151.072s)\n    hex dump (first 32 bytes):\n      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    backtrace:\n      [\u003c000000000759fb79\u003e] amd_uncore_cpu_up_prepare+0xaf/0x230\n      [\u003c00000000ddc9e126\u003e] cpuhp_invoke_callback+0x2cf/0x470\n      [\u003c0000000093e727d4\u003e] cpuhp_issue_call+0x14d/0x170\n      [\u003c0000000045464d54\u003e] __cpuhp_setup_state_cpuslocked+0x11e/0x330\n      [\u003c0000000069f67cbd\u003e] __cpuhp_setup_state+0x6b/0x110\n      [\u003c0000000015365e0f\u003e] amd_uncore_init+0x260/0x321\n      [\u003c00000000089152d2\u003e] do_one_initcall+0x3f/0x1f0\n      [\u003c000000002d0bd18d\u003e] kernel_init_freeable+0x1ca/0x212\n      [\u003c0000000030be8dde\u003e] kernel_init+0x11/0x120\n      [\u003c0000000059709e59\u003e] ret_from_fork+0x22/0x30\n  unreferenced object 0xffff8c5944b8dd40 (size 64):\n    comm \"swapper/0\", pid 1, jiffies 4294670387 (age 151.072s)\n    hex dump (first 32 bytes):\n      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    backtrace:\n      [\u003c00000000306efe8b\u003e] amd_uncore_cpu_up_prepare+0x183/0x230\n      [\u003c00000000ddc9e126\u003e] cpuhp_invoke_callback+0x2cf/0x470\n      [\u003c0000000093e727d4\u003e] cpuhp_issue_call+0x14d/0x170\n      [\u003c0000000045464d54\u003e] __cpuhp_setup_state_cpuslocked+0x11e/0x330\n      [\u003c0000000069f67cbd\u003e] __cpuhp_setup_state+0x6b/0x110\n      [\u003c0000000015365e0f\u003e] amd_uncore_init+0x260/0x321\n      [\u003c00000000089152d2\u003e] do_one_initcall+0x3f/0x1f0\n      [\u003c000000002d0bd18d\u003e] kernel_init_freeable+0x1ca/0x212\n      [\u003c0000000030be8dde\u003e] kernel_init+0x11/0x120\n      [\u003c0000000059709e59\u003e] ret_from_fork+0x22/0x30\n  [...]\n\nFix the problem by freeing the events array before freeing the uncore\ncontext."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:06:42.965Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f75be9885d49e3717de962345c4572ddab52b178"
        },
        {
          "url": "https://git.kernel.org/stable/c/bdfe34597139cfcecd47a2eb97fea44d77157491"
        }
      ],
      "title": "perf/x86/amd/uncore: Fix memory leak for events array",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49784",
    "datePublished": "2025-05-01T14:09:17.695Z",
    "dateReserved": "2025-05-01T14:05:17.223Z",
    "dateUpdated": "2026-05-11T19:06:42.965Z",
    "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.
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