CVE-2025-38238 (GCVE-0-2025-38238)
Vulnerability from cvelistv5
Published
2025-07-09 10:42
Modified
2026-08-05 12:00
Severity ?
8.8 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: fnic: Fix crash in fnic_wq_cmpl_handler when FDMI times out When both the RHBA and RPA FDMI requests time out, fnic reuses a frame to send ABTS for each of them. On send completion, this causes an attempt to free the same frame twice that leads to a crash. Fix crash by allocating separate frames for RHBA and RPA, and modify ABTS logic accordingly. Tested by checking MDS for FDMI information. Tested by using instrumented driver to: - Drop PLOGI response - Drop RHBA response - Drop RPA response - Drop RHBA and RPA response - Drop PLOGI response + ABTS response - Drop RHBA response + ABTS response - Drop RPA response + ABTS response - Drop RHBA and RPA response + ABTS response for both of them
References
Impacted products
Vendor Product Version
Linux Linux Version: 09c1e6ab4ab2a107d96f119950dc330e446dc2b0
Version: 09c1e6ab4ab2a107d96f119950dc330e446dc2b0
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/fnic/fdls_disc.c",
            "drivers/scsi/fnic/fnic.h",
            "drivers/scsi/fnic/fnic_fdls.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "09679e9abedfbc5a2590759a1a7893c1c26e6044",
              "status": "affected",
              "version": "09c1e6ab4ab2a107d96f119950dc330e446dc2b0",
              "versionType": "git"
            },
            {
              "lessThan": "a35b29bdedb4d2ae3160d4d6684a6f1ecd9ca7c2",
              "status": "affected",
              "version": "09c1e6ab4ab2a107d96f119950dc330e446dc2b0",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/fnic/fdls_disc.c",
            "drivers/scsi/fnic/fnic.h",
            "drivers/scsi/fnic/fnic_fdls.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.14"
            },
            {
              "lessThan": "6.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15.5",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.16",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: fnic: Fix crash in fnic_wq_cmpl_handler when FDMI times out\n\nWhen both the RHBA and RPA FDMI requests time out, fnic reuses a frame to\nsend ABTS for each of them. On send completion, this causes an attempt to\nfree the same frame twice that leads to a crash.\n\nFix crash by allocating separate frames for RHBA and RPA, and modify ABTS\nlogic accordingly.\n\nTested by checking MDS for FDMI information.\n\nTested by using instrumented driver to:\n\n - Drop PLOGI response\n - Drop RHBA response\n - Drop RPA response\n - Drop RHBA and RPA response\n - Drop PLOGI response + ABTS response\n - Drop RHBA response + ABTS response\n - Drop RPA response + ABTS response\n - Drop RHBA and RPA response + ABTS response for both of them"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - The trigger is entirely controlled by the FCoE fabric peer \u2014 withholding both the FDMI RHBA and RPA responses after accepting the FDMI PLOGI \u2014 and FCoE/FIP is a non-routable layer-2 protocol confined to the shared FCoE VLAN/storage fabric, so the attacker must be on the same broadcast domain (or be the unauthenticated FCF, which FIP allows spoofing).\nAC:L - No race and no memory-layout precondition: the attacker simply does not answer the two FDMI registration requests, which deterministically drives fdls_fdmi_timer_callback() into fdls_send_fdmi_abts() with both REG_HBA_PENDING and RPA_PENDING set, sending the one allocated frame twice.\nPR:N - The attacker is a remote fabric peer with no account or privileges on the target host; the FDMI exchange is initiated automatically by the driver during fabric login and requires no local access whatsoever.\nUI:N - FDMI is enabled by default (fnic_fdmi_support = 1) and fnic_fdls_start_plogi() launches the FDMI sequence automatically on fabric PLOGI/link-up; no administrator or user action is needed.\nS:U - The double free corrupts the kernel slab allocator within the same security authority as the vulnerable driver; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The slab double-free hands the same 2112-byte object to two independent consumers, letting one exchange\u0027s kernel data be transmitted onto the fabric to the attacker, and freelist corruption on a mergeable cache is a standard stepping stone to arbitrary kernel memory disclosure.\nI:H - A double kmem_cache_free() of a live object is the canonical heap-corruption primitive \u2014 freelist poisoning and overlapping allocations yield a controlled write, compounded by the double dma_unmap_single() and the OX_ID write into an already-DMA-mapped buffer.\nA:H - The fix commit exists precisely because the second free crashes the kernel in fnic_wq_cmpl_handler; the resulting allocator corruption reliably panics the machine and takes the FC storage path down with it."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:00:36.529Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/09679e9abedfbc5a2590759a1a7893c1c26e6044"
        },
        {
          "url": "https://git.kernel.org/stable/c/a35b29bdedb4d2ae3160d4d6684a6f1ecd9ca7c2"
        }
      ],
      "title": "scsi: fnic: Fix crash in fnic_wq_cmpl_handler when FDMI times out",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38238",
    "datePublished": "2025-07-09T10:42:23.538Z",
    "dateReserved": "2025-04-16T04:51:23.996Z",
    "dateUpdated": "2026-08-05T12:00:36.529Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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