Vulnerability-Lookup

GHSA-F9FF-3974-GP4H

Vulnerability from github – Published: 2026-05-06 12:30 – Updated: 2026-05-11 21:31

Details

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

tracing: ring-buffer: Fix to check event length before using

Check the event length before adding it for accessing next index in rb_read_data_buffer(). Since this function is used for validating possibly broken ring buffers, the length of the event could be broken. In that case, the new event (e + len) can point a wrong address. To avoid invalid memory access at boot, check whether the length of each event is in the possible range before using it.

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-2026-43210"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-06T12:16:40Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: ring-buffer: Fix to check event length before using\n\nCheck the event length before adding it for accessing next index in\nrb_read_data_buffer(). Since this function is used for validating\npossibly broken ring buffers, the length of the event could be broken.\nIn that case, the new event (e + len) can point a wrong address.\nTo avoid invalid memory access at boot, check whether the length of\neach event is in the possible range before using it.",
  "id": "GHSA-f9ff-3974-gp4h",
  "modified": "2026-05-11T21:31:30Z",
  "published": "2026-05-06T12:30:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43210"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5026010110a5ad2268d8c23e1e286ab7c736f7ac"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/912b0ee248c529a4f45d1e7f568dc1adddbf2a4a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9eb80e54494ef1efef8a64bec4ffa672c9cf411e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b4700c089a10f89de3a5149d57f8a58306458982"
    }
  ],
  "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-2026-43210 (GCVE-0-2026-43210)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:28 – Updated: 2026-05-11 22:20

Title

tracing: ring-buffer: Fix to check event length before using

Summary

In the Linux kernel, the following vulnerability has been resolved: tracing: ring-buffer: Fix to check event length before using Check the event length before adding it for accessing next index in rb_read_data_buffer(). Since this function is used for validating possibly broken ring buffers, the length of the event could be broken. In that case, the new event (e + len) can point a wrong address. To avoid invalid memory access at boot, check whether the length of each event is in the possible range before using it.

Severity ?

No CVSS data available.

Assigner

Linux

References

4 references

URL	Tags
https://git.kernel.org/stable/c/b4700c089a10f89de…
https://git.kernel.org/stable/c/5026010110a5ad226…
https://git.kernel.org/stable/c/9eb80e54494ef1efe…
https://git.kernel.org/stable/c/912b0ee248c529a4f…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55 , < b4700c089a10f89de3a5149d57f8a58306458982 (git) Affected: 5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55 , < 5026010110a5ad2268d8c23e1e286ab7c736f7ac (git) Affected: 5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55 , < 9eb80e54494ef1efef8a64bec4ffa672c9cf411e (git) Affected: 5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55 , < 912b0ee248c529a4f45d1e7f568dc1adddbf2a4a (git)
Linux	Linux	Affected: 6.12 Unaffected: 0 , < 6.12 (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)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/trace/ring_buffer.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b4700c089a10f89de3a5149d57f8a58306458982",
              "status": "affected",
              "version": "5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55",
              "versionType": "git"
            },
            {
              "lessThan": "5026010110a5ad2268d8c23e1e286ab7c736f7ac",
              "status": "affected",
              "version": "5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55",
              "versionType": "git"
            },
            {
              "lessThan": "9eb80e54494ef1efef8a64bec4ffa672c9cf411e",
              "status": "affected",
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              "versionType": "git"
            },
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              "status": "affected",
              "version": "5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/trace/ring_buffer.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.12"
            },
            {
              "lessThan": "6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.75",
                  "versionStartIncluding": "6.12",
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                },
                {
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                },
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                }
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              "negate": false,
              "operator": "OR"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: ring-buffer: Fix to check event length before using\n\nCheck the event length before adding it for accessing next index in\nrb_read_data_buffer(). Since this function is used for validating\npossibly broken ring buffers, the length of the event could be broken.\nIn that case, the new event (e + len) can point a wrong address.\nTo avoid invalid memory access at boot, check whether the length of\neach event is in the possible range before using it."
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:20:07.951Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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        {
          "url": "https://git.kernel.org/stable/c/912b0ee248c529a4f45d1e7f568dc1adddbf2a4a"
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      "title": "tracing: ring-buffer: Fix to check event length before using",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43210",
    "datePublished": "2026-05-06T11:28:13.609Z",
    "dateReserved": "2026-05-01T14:12:55.993Z",
    "dateUpdated": "2026-05-11T22:20:07.951Z",
    "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

GHSA-F9FF-3974-GP4H

CVE-2026-43210 (GCVE-0-2026-43210)

Tags

Sightings

Nomenclature