Vulnerability-Lookup

FKIE_CVE-2026-31744

Vulnerability from fkie_nvd - Published: 2026-05-01 15:16 - Updated: 2026-06-17 10:34

Severity

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: PM: EM: Fix NULL pointer dereference when perf domain ID is not found dev_energymodel_nl_get_perf_domains_doit() calls em_perf_domain_get_by_id() but does not check the return value before passing it to __em_nl_get_pd_size(). When a caller supplies a non-existent perf domain ID, em_perf_domain_get_by_id() returns NULL, and __em_nl_get_pd_size() immediately dereferences pd->cpus (struct offset 0x30), causing a NULL pointer dereference. The sister handler dev_energymodel_nl_get_perf_table_doit() already handles this correctly via __em_nl_get_pd_table_id(), which returns NULL and causes the caller to return -EINVAL. Add the same NULL check in the get-perf-domains do handler. [ rjw: Subject and changelog edits ]

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9badc2a84e688be1275bb740942d5f6f51746908	Patch
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ab09b9a1e3b02ff62c5aebe3b12b0cb4cb4ea8ab	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/power/em_netlink.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "380ff27af25e49e2cb2ff8fd0ecd7c95be2976ee",
              "versionType": "git"
            },
            {
              "lessThan": "9badc2a84e688be1275bb740942d5f6f51746908",
              "status": "affected",
              "version": "380ff27af25e49e2cb2ff8fd0ecd7c95be2976ee",
              "versionType": "git"
            }
          ]
        },
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          "vendor": "Linux",
          "versions": [
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              "version": "6.19"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
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    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPM: EM: Fix NULL pointer dereference when perf domain ID is not found\n\ndev_energymodel_nl_get_perf_domains_doit() calls\nem_perf_domain_get_by_id() but does not check the return value before\npassing it to __em_nl_get_pd_size(). When a caller supplies a\nnon-existent perf domain ID, em_perf_domain_get_by_id() returns NULL,\nand __em_nl_get_pd_size() immediately dereferences pd-\u003ecpus\n(struct offset 0x30), causing a NULL pointer dereference.\n\nThe sister handler dev_energymodel_nl_get_perf_table_doit() already\nhandles this correctly via __em_nl_get_pd_table_id(), which returns\nNULL and causes the caller to return -EINVAL. Add the same NULL check\nin the get-perf-domains do handler.\n\n[ rjw: Subject and changelog edits ]"
    }
  ],
  "id": "CVE-2026-31744",
  "lastModified": "2026-06-17T10:34:22.970",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-05-01T15:16:37.157",
  "references": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    },
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-31744 (GCVE-0-2026-31744)

Vulnerability from cvelistv5 – Published: 2026-05-01 14:14 – Updated: 2026-05-11 22:14

Title

PM: EM: Fix NULL pointer dereference when perf domain ID is not found

Summary

Severity

No CVSS data available.

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/ab09b9a1e3b02ff62…
https://git.kernel.org/stable/c/9badc2a84e688be12…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 380ff27af25e49e2cb2ff8fd0ecd7c95be2976ee , < ab09b9a1e3b02ff62c5aebe3b12b0cb4cb4ea8ab (git) Affected: 380ff27af25e49e2cb2ff8fd0ecd7c95be2976ee , < 9badc2a84e688be1275bb740942d5f6f51746908 (git)
Linux	Linux	Affected: 6.19 Unaffected: 0 , < 6.19 (semver) Unaffected: 6.19.12 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/power/em_netlink.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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              "versionType": "git"
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              "versionType": "semver"
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            },
            {
              "lessThanOrEqual": "*",
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              "version": "7.0",
              "versionType": "original_commit_for_fix"
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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.
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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.

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.
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FKIE_CVE-2026-31744

CVE-2026-31744 (GCVE-0-2026-31744)

Tags

Sightings

Nomenclature

Related by attack behaviour