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CVE-2026-74361 (GCVE-0-2026-74361)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:58 – Updated: 2026-08-17 05:46
VLAI
Title
nvme: fix FDP fdpcidx bounds check
Summary
In the Linux kernel, the following vulnerability has been resolved: nvme: fix FDP fdpcidx bounds check The fdpcidx bounds check sets n = NUMFDPC + 1 but used > instead of >=, incorrectly accepting fdp_idx when it equals n (i.e. NUMFDPC + 1).
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 30b5f20bb2ddab013035399e5c7e6577da49320a , < 5e406928404d67a8da8aa3ae21732e1ea1a04118 (git)
Affected: 30b5f20bb2ddab013035399e5c7e6577da49320a , < 5d0e7d2af884b91329235abb16652ae4eead8079 (git)
Affected: 30b5f20bb2ddab013035399e5c7e6577da49320a , < 0967074f6830718fd2597404ef119bddd0dbfd00 (git)
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Linux Linux Affected: 6.16
Unaffected: 0 , < 6.16 (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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Show details on NVD website
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              "lang": "en",
              "value": "AV:N - The bug is in the NVMe host driver while parsing Get Features/Get Log responses during namespace scan; a malicious NVMe-oF target can deliver crafted FDP data over TCP/RDMA to any host already using remote NVMe storage, which is the highest-impact reachable deployment.\nAC:L - An attacker controlling the NVMe endpoint fully sets fdpcidx and numfdpc in protocol responses and can reliably make fdpcidx equal numfdpc+1, walk one descriptor past the valid list, and hit the out-of-bounds read without races or victim-specific heap layout.\nPR:N - Exploitation needs no local account or capabilities on the victim; a remote malicious/compromised NVMe-oF target (or physical device inserted by an attacker) triggers parsing during connect/rescan/AEN-driven namespace scans without further local authorization.\nUI:N - No victim user action is required at exploit time because namespace scanning and AEN-triggered rescans run automatically in kernel workqueues once a controller is present, and a remote target can force rescans with Notice Namespace Changed events.\nS:U - Impact is confined to kernel memory and block-layer metadata on the host parsing the malicious device responses; it does not cross a VM, container, or IOMMU security boundary into a separate authority.\nC:H - Accepting fdpcidx=numfdpc+1 lets the descriptor walk advance past the last valid FDP configuration and then reads desc-\u003enrg and desc-\u003eruns out of bounds, leaking adjacent kvmalloc/heap contents or attacker-crafted bytes from beyond the valid descriptor array.\nI:H - The out-of-bounds descriptor fields are copied into info-\u003eruns and influence queue write_stream_granularity limits, giving attacker-controlled modification of kernel block-layer state from memory corruption primitives that can be chained beyond a simple crash.\nA:H - If the out-of-bounds descriptor pointer lies past the allocated FDP log buffer, accessing desc-\u003enrg/desc-\u003eruns can fault the kernel (oops/panic); even successful parsing still represents unsafe memory access with high availability risk under attacker control."
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    "datePublished": "2026-08-15T05:58:44.857Z",
    "dateReserved": "2026-08-15T05:44:03.887Z",
    "dateUpdated": "2026-08-17T05:46:20.518Z",
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      "cve": "CVE-2026-74361",
      "id": "CVE-2026-74361",
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      "cve": "CVE-2026-74361",
      "id": "CVE-2026-74361",
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      "source": "SUSE CSAF VEX",
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      "title": "SUSE CVE CVE-2026-74361",
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}



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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.


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.