Vulnerability-Lookup

FKIE_CVE-2026-43171

Vulnerability from fkie_nvd - Published: 2026-05-06 12:16 - Updated: 2026-05-13 14:55

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: EFI/CPER: don't dump the entire memory region The current logic at cper_print_fw_err() doesn't check if the error record length is big enough to handle offset. On a bad firmware, if the ofset is above the actual record, length -= offset will underflow, making it dump the entire memory. The end result can be: - the logic taking a lot of time dumping large regions of memory; - data disclosure due to the memory dumps; - an OOPS, if it tries to dump an unmapped memory region. Fix it by checking if the section length is too small before doing a hex dump. [ rjw: Subject tweaks ]

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/02de64ab54b4bb0f1b21bb324aeff3b08612be33	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0e09b522f2622841389c3b2f9ac4969e35c0809d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/54e131db4cdffd946db890ff33ff2647053fd4f6	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/55cc6fe5716f678f06bcb95140882dfa684464ec	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5a9b1dda8481b82851a655c3bcc5b44879b95334	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/64ae5aaa7ac93c83da456039e8ec747bfa8a7cff	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7780c0bad2a3a70a8c0113a33c02f4151d901eb3	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a8419f5f2c5f2d80848ddabb2b95cf0da84a5f91	Patch

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	5.7
linux	linux_kernel	5.7

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nEFI/CPER: don\u0027t dump the entire memory region\n\nThe current logic at cper_print_fw_err() doesn\u0027t check if the\nerror record length is big enough to handle offset. On a bad firmware,\nif the ofset is above the actual record, length -= offset will\nunderflow, making it dump the entire memory.\n\nThe end result can be:\n\n - the logic taking a lot of time dumping large regions of memory;\n - data disclosure due to the memory dumps;\n - an OOPS, if it tries to dump an unmapped memory region.\n\nFix it by checking if the section length is too small before doing\na hex dump.\n\n[ rjw: Subject tweaks ]"
    }
  ],
  "id": "CVE-2026-43171",
  "lastModified": "2026-05-13T14:55:22.277",
  "metrics": {
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          "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"
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        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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          "value": "CWE-191"
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      "source": "nvd@nist.gov",
      "type": "Primary"
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  ]
}

CVE-2026-43171 (GCVE-0-2026-43171)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:27 – Updated: 2026-05-11 22:19

Title

EFI/CPER: don't dump the entire memory region

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/02de64ab54b4bb0f1…
https://git.kernel.org/stable/c/0e09b522f26228413…
https://git.kernel.org/stable/c/64ae5aaa7ac93c83d…
https://git.kernel.org/stable/c/5a9b1dda8481b8285…
https://git.kernel.org/stable/c/7780c0bad2a3a70a8…
https://git.kernel.org/stable/c/a8419f5f2c5f2d808…
https://git.kernel.org/stable/c/54e131db4cdffd946…
https://git.kernel.org/stable/c/55cc6fe5716f678f0…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 , < 02de64ab54b4bb0f1b21bb324aeff3b08612be33 (git) Affected: 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 , < 0e09b522f2622841389c3b2f9ac4969e35c0809d (git) Affected: 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 , < 64ae5aaa7ac93c83da456039e8ec747bfa8a7cff (git) Affected: 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 , < 5a9b1dda8481b82851a655c3bcc5b44879b95334 (git) Affected: 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 , < 7780c0bad2a3a70a8c0113a33c02f4151d901eb3 (git) Affected: 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 , < a8419f5f2c5f2d80848ddabb2b95cf0da84a5f91 (git) Affected: 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 , < 54e131db4cdffd946db890ff33ff2647053fd4f6 (git) Affected: 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 , < 55cc6fe5716f678f06bcb95140882dfa684464ec (git)
Linux	Linux	Affected: 5.7 Unaffected: 0 , < 5.7 (semver) Unaffected: 5.10.252 , ≤ 5.10.* (semver) Unaffected: 5.15.202 , ≤ 5.15.* (semver) Unaffected: 6.1.165 , ≤ 6.1.* (semver) Unaffected: 6.6.128 , ≤ 6.6.* (semver) Unaffected: 6.12.75 , ≤ 6.12.* (semver) Unaffected: 6.18.16 , ≤ 6.18.* (semver) Unaffected: 6.19.6 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/firmware/efi/cper.c"
          ],
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        },
        {
          "url": "https://git.kernel.org/stable/c/55cc6fe5716f678f06bcb95140882dfa684464ec"
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      ],
      "title": "EFI/CPER: don\u0027t dump the entire memory region",
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        "engine": "bippy-1.2.0"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43171",
    "datePublished": "2026-05-06T11:27:46.698Z",
    "dateReserved": "2026-05-01T14:12:55.990Z",
    "dateUpdated": "2026-05-11T22:19:09.627Z",
    "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.

Action not permitted

FKIE_CVE-2026-43171

CVE-2026-43171 (GCVE-0-2026-43171)

Tags

Sightings

Nomenclature