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CVE-2026-89458 (GCVE-0-2026-89458)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:43 – Updated: 2026-09-14 11:59
VLAI
Title
s390/dasd: Do not complete a failed ESE read as successful
Summary
In the Linux kernel, the following vulnerability has been resolved: s390/dasd: Do not complete a failed ESE read as successful dasd_int_handler() completes an NRF read of an unallocated ESE track by calling ese_read() and unconditionally marking the request DASD_CQR_SUCCESS. dasd_eckd_ese_read() can return an error before it has zeroed the destination buffer: a failed sense-data parse or a current track outside the requested range both return early, leaving the destination pages untouched. The request is still completed successfully, so the block layer is handed stale / uninitialized memory instead of zeros. Check the ese_read() return value and fail the request through the normal error path instead of forcing DASD_CQR_SUCCESS.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 5e6bdd37c5526ef01326df5dabb93011ee89237e , < 8cb96cffceead3cbd0541154d7ecc5e6474edda1 (git)
Affected: 5e6bdd37c5526ef01326df5dabb93011ee89237e , < 77168af195d04b34c6de62b874624e74d64cef8d (git)
Affected: 5e6bdd37c5526ef01326df5dabb93011ee89237e , < 921ff697bb6f7067059793becf8b2d00de71ce41 (git)
Affected: 5e6bdd37c5526ef01326df5dabb93011ee89237e , < 55f4df40178cdfede0d7ae848fbab00efa9b95c1 (git)
Affected: 5e6bdd37c5526ef01326df5dabb93011ee89237e , < c9adf8399732306dfc97b3adb4778038743e3f5e (git)
Affected: 5e6bdd37c5526ef01326df5dabb93011ee89237e , < 52b331c99baac653ca794bd8487c8ec4de8db203 (git)
Affected: 5e6bdd37c5526ef01326df5dabb93011ee89237e , < b0d94dd6e82df396e2254c8b0f25eff7d19c2e7f (git)
Affected: 5e6bdd37c5526ef01326df5dabb93011ee89237e , < cddb447c62466f3076938ce120028d7b591f9f37 (git)
Affected: fbbacd0dcbc3ae9398c569dbea96ae4b5ad97e04 (git)
Affected: 5f7c9989f11305aaa43e0f4378f4f070022a9f2b (git)
Affected: 5.4.26 , < 5.5 (semver)
Affected: 5.5.10 , < 5.6 (semver)
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Linux Linux Affected: 5.6
Unaffected: 0 , < 5.6 (semver)
Unaffected: 5.10.270 , ≤ 5.10.* (semver)
Unaffected: 5.15.221 , ≤ 5.15.* (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.109 , ≤ 6.12.* (semver)
Unaffected: 6.18.50 , ≤ 6.18.* (semver)
Unaffected: 7.2.4 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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      "product_status:known_affected": "260",
      "product_status:known_not_affected": "93",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-89458",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-89458.json",
      "version": "2"
    }
  }
}



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Tags
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.