CVE-2026-43163 (GCVE-0-2026-43163)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:27 – Updated: 2026-05-11 22:18
VLAI
Title
md/bitmap: fix GPF in write_page caused by resize race
Summary
In the Linux kernel, the following vulnerability has been resolved: md/bitmap: fix GPF in write_page caused by resize race A General Protection Fault occurs in write_page() during array resize: RIP: 0010:write_page+0x22b/0x3c0 [md_mod] This is a use-after-free race between bitmap_daemon_work() and __bitmap_resize(). The daemon iterates over `bitmap->storage.filemap` without locking, while the resize path frees that storage via md_bitmap_file_unmap(). `quiesce()` does not stop the md thread, allowing concurrent access to freed pages. Fix by holding `mddev->bitmap_info.mutex` during the bitmap update.
Severity
4.7 (Medium)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d60b479d177a5735b6b4db6ee5280ef6653f50e7 , < 140cc839fbeb1ddb33a8da8811b716d88d3905b7 (git)
Affected: d60b479d177a5735b6b4db6ee5280ef6653f50e7 , < ebcacc7ca22d5e8a03a970f0621ae1d1356b9ae8 (git)
Affected: d60b479d177a5735b6b4db6ee5280ef6653f50e7 , < d3af62411e19752c663fe4f424dbf49d95a4cc7c (git)
Affected: d60b479d177a5735b6b4db6ee5280ef6653f50e7 , < d92b8fac294b5f915c50e65ce4ae2262e53614ec (git)
Affected: d60b479d177a5735b6b4db6ee5280ef6653f50e7 , < a437e3bf30e32846079e470c1ba5ee790bccdf89 (git)
Affected: d60b479d177a5735b6b4db6ee5280ef6653f50e7 , < 9a6f8cd28bb9bb6ed86a6df19331fb08016dee7f (git)
Affected: d60b479d177a5735b6b4db6ee5280ef6653f50e7 , < 5f73c8b33df9a605a591eab72d43a969600c1f8c (git)
Affected: d60b479d177a5735b6b4db6ee5280ef6653f50e7 , < 46ef85f854dfa9d5226b3c1c46493d79556c9589 (git)
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Linux Linux Affected: 3.5
Unaffected: 0 , < 3.5 (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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          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-362"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-12T02:33:18+00:00",
      "cve": "CVE-2026-43163",
      "id": "CVE-2026-43163",
      "initial_release_date": "2026-05-06T00:00:00+00:00",
      "product_status:fixed": "2131",
      "product_status:known_affected": "22",
      "product_status:known_not_affected": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: md/bitmap: fix GPF in write_page caused by resize race",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43163.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-18T00:56:10Z",
      "cve": "CVE-2026-43163",
      "id": "CVE-2026-43163",
      "initial_release_date": "2026-05-07T02:17:30Z",
      "product_status:known_affected": "745",
      "product_status:known_not_affected": "4",
      "product_status:recommended": "223",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-43163",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-43163.json",
      "version": "9"
    }
  }
}



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Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.


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.