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)
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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.