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CVE-2025-68741 (GCVE-0-2025-68741)

Vulnerability from cvelistv5 – Published: 2025-12-24 12:09 – Updated: 2026-08-05 12:11
VLAI
Title
scsi: qla2xxx: Fix improper freeing of purex item
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Fix improper freeing of purex item In qla2xxx_process_purls_iocb(), an item is allocated via qla27xx_copy_multiple_pkt(), which internally calls qla24xx_alloc_purex_item(). The qla24xx_alloc_purex_item() function may return a pre-allocated item from a per-adapter pool for small allocations, instead of dynamically allocating memory with kzalloc(). An error handling path in qla2xxx_process_purls_iocb() incorrectly uses kfree() to release the item. If the item was from the pre-allocated pool, calling kfree() on it is a bug that can lead to memory corruption. Fix this by using the correct deallocation function, qla24xx_free_purex_item(), which properly handles both dynamically allocated and pre-allocated items.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-16 19:31 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 875386b98857822b77ac7f95bdf367b70af5b78c , < 4bccd506a1f1ab01d1f45b2a3effff6bedc73cf9 (git)
Affected: 875386b98857822b77ac7f95bdf367b70af5b78c , < 8e9f0a0717ba31d5842721627ade1e62d7aec012 (git)
Affected: 875386b98857822b77ac7f95bdf367b70af5b78c , < cfe3e2f768d248fd3d965d561d0768a56dd0b9f8 (git)
Affected: 875386b98857822b77ac7f95bdf367b70af5b78c , < 5fa1c8226b4532ad7011d295d3ab4ad45df105ae (git)
Affected: 875386b98857822b77ac7f95bdf367b70af5b78c , < 78b1a242fe612a755f2158fd206ee6bb577d18ca (git)
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Linux Linux Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 6.6.120 , ≤ 6.6.* (semver)
Unaffected: 6.12.63 , ≤ 6.12.* (semver)
Unaffected: 6.17.13 , ≤ 6.17.* (semver)
Unaffected: 6.18.2 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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This remote storage-network traffic can traverse switched or extended FC fabrics without local victim access.\\nAC:L - The peer controls a sub-64-byte LS request so qla24xx_alloc_purex_item() selects the embedded default item, and repeated request flooding can pressure GFP_ATOMIC allocations until the subsequent context allocation fails. No attacker-uncontrollable race or address guess is required.\\nPR:N - The source ID must match a discovered, non-deleted FC port, but the vulnerable path performs no credential, capability, or authorization check. An attacker operating that remote peer requires no privileges on the victim.\\nUI:N - Processing occurs automatically in the HBA interrupt response path when the unsolicited FC-NVMe frame arrives. No victim action is required during exploitation.\\nS:U - The corruption compromises the kernel and resources governed by that same host security authority. It does not inherently cross a VM, IOMMU, or other separate security boundary.\\nC:H - Freeing the embedded item can poison allocator metadata or release memory backing the live Scsi_Host and qla adapter state, creating a powerful use-after-free and reclaim opportunity. Heap shaping can leverage this corruption to disclose arbitrary kernel memory.\\nI:H - The invalid free permits reuse and corruption of live kernel and adapter structures. Attacker-influenced allocations and payload processing can turn this into arbitrary writes or control-flow hijacking.\\nA:H - The invalid free can immediately trigger allocator diagnostics, an oops, or a panic, while undetected slab corruption and use-after-free can crash the kernel later. The remote peer can repeat the triggering traffic.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"875386b98857822b77ac7f95bdf367b70af5b78c\", \"lessThan\": \"4bccd506a1f1ab01d1f45b2a3effff6bedc73cf9\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"875386b98857822b77ac7f95bdf367b70af5b78c\", \"lessThan\": \"8e9f0a0717ba31d5842721627ade1e62d7aec012\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"875386b98857822b77ac7f95bdf367b70af5b78c\", \"lessThan\": \"cfe3e2f768d248fd3d965d561d0768a56dd0b9f8\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"875386b98857822b77ac7f95bdf367b70af5b78c\", \"lessThan\": \"5fa1c8226b4532ad7011d295d3ab4ad45df105ae\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"875386b98857822b77ac7f95bdf367b70af5b78c\", \"lessThan\": \"78b1a242fe612a755f2158fd206ee6bb577d18ca\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/scsi/qla2xxx/qla_nvme.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.6\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.6\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.6.120\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.63\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.17.13\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.17.*\"}, {\"status\": \"unaffected\", \"version\": \"6.18.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.18.*\"}, {\"status\": \"unaffected\", \"version\": \"6.19\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/scsi/qla2xxx/qla_nvme.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/4bccd506a1f1ab01d1f45b2a3effff6bedc73cf9\"}, {\"url\": \"https://git.kernel.org/stable/c/8e9f0a0717ba31d5842721627ade1e62d7aec012\"}, {\"url\": \"https://git.kernel.org/stable/c/cfe3e2f768d248fd3d965d561d0768a56dd0b9f8\"}, {\"url\": \"https://git.kernel.org/stable/c/5fa1c8226b4532ad7011d295d3ab4ad45df105ae\"}, {\"url\": \"https://git.kernel.org/stable/c/78b1a242fe612a755f2158fd206ee6bb577d18ca\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nscsi: qla2xxx: Fix improper freeing of purex item\\n\\nIn qla2xxx_process_purls_iocb(), an item is allocated via\\nqla27xx_copy_multiple_pkt(), which internally calls\\nqla24xx_alloc_purex_item().\\n\\nThe qla24xx_alloc_purex_item() function may return a pre-allocated item\\nfrom a per-adapter pool for small allocations, instead of dynamically\\nallocating memory with kzalloc().\\n\\nAn error handling path in qla2xxx_process_purls_iocb() incorrectly uses\\nkfree() to release the item. If the item was from the pre-allocated\\npool, calling kfree() on it is a bug that can lead to memory corruption.\\n\\nFix this by using the correct deallocation function,\\nqla24xx_free_purex_item(), which properly handles both dynamically\\nallocated and pre-allocated items.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.120\", \"versionStartIncluding\": \"6.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.63\", \"versionStartIncluding\": \"6.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.17.13\", \"versionStartIncluding\": \"6.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18.2\", \"versionStartIncluding\": \"6.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.19\", \"versionStartIncluding\": \"6.6\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T12:11:13.586Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-68741\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T12:11:13.586Z\", \"dateReserved\": \"2025-12-24T10:30:51.030Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-12-24T12:09:38.655Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.