Vulnerability-Lookup

FKIE_CVE-2025-39902

Vulnerability from fkie_nvd - Published: 2025-10-01 08:15 - Updated: 2026-01-16 19:30

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: mm/slub: avoid accessing metadata when pointer is invalid in object_err() object_err() reports details of an object for further debugging, such as the freelist pointer, redzone, etc. However, if the pointer is invalid, attempting to access object metadata can lead to a crash since it does not point to a valid object. One known path to the crash is when alloc_consistency_checks() determines the pointer to the allocated object is invalid because of a freelist corruption, and calls object_err() to report it. The debug code should report and handle the corruption gracefully and not crash in the process. In case the pointer is NULL or check_valid_pointer() returns false for the pointer, only print the pointer value and skip accessing metadata.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0ef7058b4dc6fcef622ac23b45225db57f17b83f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1f0797f17927b5cad0fb7eced422f9a7c30a3191	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3baa1da473e6e50281324ff1d332d1a07a3bb02e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7e287256904ee796c9477e3ec92b07f236481ef3	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/872f2c34ff232af1e65ad2df86d61163c8ffad42	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b4efccec8d06ceb10a7d34d7b1c449c569d53770	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/dda6ec365ab04067adae40ef17015db447e90736	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f66012909e7bf383fcdc5850709ed5716073fdc4	Patch
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html	Third Party Advisory

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.17
linux	linux_kernel	6.17
linux	linux_kernel	6.17
linux	linux_kernel	6.17
debian	debian_linux	11.0

JSON

To clipboard

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    }
  ],
  "id": "CVE-2025-39902",
  "lastModified": "2026-01-16T19:30:38.430",
  "metrics": {
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
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          "version": "3.1"
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        "impactScore": 3.6,
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}

CVE-2025-39902 (GCVE-0-2025-39902)

Vulnerability from cvelistv5 – Published: 2025-10-01 07:42 – Updated: 2025-11-03 17:44

Title

mm/slub: avoid accessing metadata when pointer is invalid in object_err()

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/872f2c34ff232af1e…
	https://git.kernel.org/stable/c/f66012909e7bf383f…
	https://git.kernel.org/stable/c/7e287256904ee796c…
	https://git.kernel.org/stable/c/1f0797f17927b5cad…
	https://git.kernel.org/stable/c/0ef7058b4dc6fcef6…
	https://git.kernel.org/stable/c/dda6ec365ab04067a…
	https://git.kernel.org/stable/c/3baa1da473e6e5028…
	https://git.kernel.org/stable/c/b4efccec8d06ceb10…

Impacted products

Vendor

Product

Version

Linux

Affected: 81819f0fc8285a2a5a921c019e3e3d7b6169d225 , < 872f2c34ff232af1e65ad2df86d61163c8ffad42 (git)
Affected: 81819f0fc8285a2a5a921c019e3e3d7b6169d225 , < f66012909e7bf383fcdc5850709ed5716073fdc4 (git)
Affected: 81819f0fc8285a2a5a921c019e3e3d7b6169d225 , < 7e287256904ee796c9477e3ec92b07f236481ef3 (git)
Affected: 81819f0fc8285a2a5a921c019e3e3d7b6169d225 , < 1f0797f17927b5cad0fb7eced422f9a7c30a3191 (git)
Affected: 81819f0fc8285a2a5a921c019e3e3d7b6169d225 , < 0ef7058b4dc6fcef622ac23b45225db57f17b83f (git)
Affected: 81819f0fc8285a2a5a921c019e3e3d7b6169d225 , < dda6ec365ab04067adae40ef17015db447e90736 (git)
Affected: 81819f0fc8285a2a5a921c019e3e3d7b6169d225 , < 3baa1da473e6e50281324ff1d332d1a07a3bb02e (git)
Affected: 81819f0fc8285a2a5a921c019e3e3d7b6169d225 , < b4efccec8d06ceb10a7d34d7b1c449c569d53770 (git)

Linux

Affected: 2.6.22
Unaffected: 0 , < 2.6.22 (semver)
Unaffected: 5.4.299 , ≤ 5.4.* (semver)
Unaffected: 5.10.243 , ≤ 5.10.* (semver)
Unaffected: 5.15.192 , ≤ 5.15.* (semver)
Unaffected: 6.1.151 , ≤ 6.1.* (semver)
Unaffected: 6.6.105 , ≤ 6.6.* (semver)
Unaffected: 6.12.46 , ≤ 6.12.* (semver)
Unaffected: 6.16.6 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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        },
        {
          "url": "https://git.kernel.org/stable/c/0ef7058b4dc6fcef622ac23b45225db57f17b83f"
        },
        {
          "url": "https://git.kernel.org/stable/c/dda6ec365ab04067adae40ef17015db447e90736"
        },
        {
          "url": "https://git.kernel.org/stable/c/3baa1da473e6e50281324ff1d332d1a07a3bb02e"
        },
        {
          "url": "https://git.kernel.org/stable/c/b4efccec8d06ceb10a7d34d7b1c449c569d53770"
        }
      ],
      "title": "mm/slub: avoid accessing metadata when pointer is invalid in object_err()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39902",
    "datePublished": "2025-10-01T07:42:49.415Z",
    "dateReserved": "2025-04-16T07:20:57.146Z",
    "dateUpdated": "2025-11-03T17:44:33.198Z",
    "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

FKIE_CVE-2025-39902

CVE-2025-39902 (GCVE-0-2025-39902)

Tags

Sightings

Nomenclature