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CVE-2023-53826 (GCVE-0-2023-53826)

Vulnerability from cvelistv5 – Published: 2025-12-09 01:29 – Updated: 2026-05-11 19:52
VLAI
Title
ubi: Fix UAF wear-leveling entry in eraseblk_count_seq_show()
Summary
In the Linux kernel, the following vulnerability has been resolved: ubi: Fix UAF wear-leveling entry in eraseblk_count_seq_show() Wear-leveling entry could be freed in error path, which may be accessed again in eraseblk_count_seq_show(), for example: __erase_worker eraseblk_count_seq_show wl = ubi->lookuptbl[*block_number] if (wl) wl_entry_destroy ubi->lookuptbl[e->pnum] = NULL kmem_cache_free(ubi_wl_entry_slab, e) erase_count = wl->ec // UAF! Wear-leveling entry updating/accessing in ubi->lookuptbl should be protected by ubi->wl_lock, fix it by adding ubi->wl_lock to serialize wl entry accessing between wl_entry_destroy() and eraseblk_count_seq_show(). Fetch a reproducer in [Link].
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 801c135ce73d5df1caf3eca35b66a10824ae0707 , < 3f9b63dfce44a7c3c095dd93d910408e07ab1845 (git)
Affected: 801c135ce73d5df1caf3eca35b66a10824ae0707 , < 84250da1c63cb7d421a3b4812b5c2ce2e47d31a1 (git)
Affected: 801c135ce73d5df1caf3eca35b66a10824ae0707 , < 1cb14c06d6035539ef4215c4ba0871aea71d7c38 (git)
Affected: 801c135ce73d5df1caf3eca35b66a10824ae0707 , < 9d448dd6bcb61a508204b57ea1f454ba9bac2f24 (git)
Affected: 801c135ce73d5df1caf3eca35b66a10824ae0707 , < 79548ccdd992707879b4b683b7251c58ddf26f12 (git)
Affected: 801c135ce73d5df1caf3eca35b66a10824ae0707 , < 84253f3c2dad6be10d30c92626c763d9a9f512ad (git)
Affected: 801c135ce73d5df1caf3eca35b66a10824ae0707 , < a100de2974d208cfca032179b02ed4d1a0a7f143 (git)
Affected: 801c135ce73d5df1caf3eca35b66a10824ae0707 , < a240bc5c43130c6aa50831d7caaa02a1d84e1bce (git)
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Linux Linux Affected: 2.6.22
Unaffected: 0 , < 2.6.22 (semver)
Unaffected: 4.14.308 , ≤ 4.14.* (semver)
Unaffected: 4.19.276 , ≤ 4.19.* (semver)
Unaffected: 5.4.235 , ≤ 5.4.* (semver)
Unaffected: 5.10.173 , ≤ 5.10.* (semver)
Unaffected: 5.15.100 , ≤ 5.15.* (semver)
Unaffected: 6.1.18 , ≤ 6.1.* (semver)
Unaffected: 6.2.5 , ≤ 6.2.* (semver)
Unaffected: 6.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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        }
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    "dateUpdated": "2026-05-11T19:52:16.903Z",
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          }
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-30T10:22:20+00:00",
      "cve": "CVE-2023-53826",
      "id": "CVE-2023-53826",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ubi: Fix UAF wear-leveling entry in eraseblk_count_seq_show()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53826.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-02T01:42:01Z",
      "cve": "CVE-2023-53826",
      "id": "CVE-2023-53826",
      "initial_release_date": "2025-12-10T00:35:20Z",
      "product_status:known_not_affected": "560",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-53826",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-53826.json",
      "version": "19"
    }
  }
}



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