CVE-2026-43124 (GCVE-0-2026-43124)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:27 – Updated: 2026-05-23 16:06
VLAI
Title
pstore: ram_core: fix incorrect success return when vmap() fails
Summary
In the Linux kernel, the following vulnerability has been resolved: pstore: ram_core: fix incorrect success return when vmap() fails In persistent_ram_vmap(), vmap() may return NULL on failure. If offset is non-zero, adding offset_in_page(start) causes the function to return a non-NULL pointer even though the mapping failed. persistent_ram_buffer_map() therefore incorrectly returns success. Subsequent access to prz->buffer may dereference an invalid address and cause crashes. Add proper NULL checking for vmap() failures.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 831b624df1b420c8f9281ed1307a8db23afb72df , < d47234840aeb4182ed3ee795c578b1dfa9cbd25b (git)
Affected: 831b624df1b420c8f9281ed1307a8db23afb72df , < 49918dd52615097529811d21ec6074dd02ebe77c (git)
Affected: 831b624df1b420c8f9281ed1307a8db23afb72df , < 8baa234181f632cabacf73e4834a910859e9fcc9 (git)
Affected: 831b624df1b420c8f9281ed1307a8db23afb72df , < 1da904e84de608907662ad8a51ba9c571d61e003 (git)
Affected: 831b624df1b420c8f9281ed1307a8db23afb72df , < 8d849adfbc3e98417fb541620568db1a759ef441 (git)
Affected: 831b624df1b420c8f9281ed1307a8db23afb72df , < 2c99326dc1c79b7ce3c8dd92929b5ce724ff70eb (git)
Affected: 831b624df1b420c8f9281ed1307a8db23afb72df , < 88d5b28f63c7aac1271784e3b800ed405d1cde75 (git)
Affected: 831b624df1b420c8f9281ed1307a8db23afb72df , < 05363abc7625cf18c96e67f50673cd07f11da5e9 (git)
Affected: 9095f19baae92afb978f8df77d19280fe291b337 (git)
Affected: 36a9916189b46b78dbf4fa542739b464444f0537 (git)
Affected: 1cd01dba1355e291f636555b1920625ed58c1623 (git)
Affected: 7026e2457c5b0c0e8a81e65a8209b8420a437b4d (git)
Affected: 1e5b387747ba285a64348b9a96b246d0b9d52b03 (git)
Affected: d0028f48b33086cf6d8f87831a650866107b5785 (git)
Affected: 3.16.62 , < 3.17 (semver)
Affected: 3.18.123 , < 3.19 (semver)
Affected: 4.4.158 , < 4.5 (semver)
Affected: 4.9.129 , < 4.10 (semver)
Affected: 4.14.72 , < 4.15 (semver)
Affected: 4.18.10 , < 4.19 (semver)
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Linux Linux Affected: 4.19
Unaffected: 0 , < 4.19 (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)
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                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "851E9353-6C09-4CC9-877E-E09DB164A3C2",
                    "versionEndExcluding": "6.6.128",
                    "versionStartIncluding": "6.2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "BCE16369-98ED-41CF-8995-DFDC10B288D2",
                    "versionEndExcluding": "6.12.75",
                    "versionStartIncluding": "6.7",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "B4B8CDA9-BADF-4CF5-8B3B-702DE8EEA40B",
                    "versionEndExcluding": "6.18.16",
                    "versionStartIncluding": "6.13",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67",
                    "versionEndExcluding": "6.19.6",
                    "versionStartIncluding": "6.19",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npstore: ram_core: fix incorrect success return when vmap() fails\n\nIn persistent_ram_vmap(), vmap() may return NULL on failure.\n\nIf offset is non-zero, adding offset_in_page(start) causes the function\nto return a non-NULL pointer even though the mapping failed.\npersistent_ram_buffer_map() therefore incorrectly returns success.\n\nSubsequent access to prz-\u003ebuffer may dereference an invalid address\nand cause crashes.\n\nAdd proper NULL checking for vmap() failures."
          }
        ],
        "id": "CVE-2026-43124",
        "lastModified": "2026-06-17T10:48:58.843",
        "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": "2026-05-06T12:16:29.313",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/05363abc7625cf18c96e67f50673cd07f11da5e9"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/1da904e84de608907662ad8a51ba9c571d61e003"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/2c99326dc1c79b7ce3c8dd92929b5ce724ff70eb"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/49918dd52615097529811d21ec6074dd02ebe77c"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/88d5b28f63c7aac1271784e3b800ed405d1cde75"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/8baa234181f632cabacf73e4834a910859e9fcc9"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/8d849adfbc3e98417fb541620568db1a759ef441"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/d47234840aeb4182ed3ee795c578b1dfa9cbd25b"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-476"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T07:35:28+00:00",
      "cve": "CVE-2026-43124",
      "id": "CVE-2026-43124",
      "initial_release_date": "2026-05-06T00:00:00+00:00",
      "product_status:known_affected": "260",
      "product_status:known_not_affected": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: pstore: ram_core: fix incorrect success return when vmap() fails",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43124.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T01:20:47Z",
      "cve": "CVE-2026-43124",
      "id": "CVE-2026-43124",
      "initial_release_date": "2026-05-09T02:42:29Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "643",
      "product_status:known_not_affected": "6",
      "product_status:recommended": "273",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-43124",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-43124.json",
      "version": "16"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.