{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-38238", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:23.996Z", "datePublished": "2025-07-09T10:42:23.538Z", "dateUpdated": "2026-08-05T12:00:36.529Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:00:36.529Z" }, "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": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - The trigger is entirely controlled by the FCoE fabric peer — withholding both the FDMI RHBA and RPA responses after accepting the FDMI PLOGI — 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's 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 — 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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/scsi/fnic/fdls_disc.c", "drivers/scsi/fnic/fnic.h", "drivers/scsi/fnic/fnic_fdls.h" ], "versions": [ { "version": "09c1e6ab4ab2a107d96f119950dc330e446dc2b0", "lessThan": "09679e9abedfbc5a2590759a1a7893c1c26e6044", "status": "affected", "versionType": "git" }, { "version": "09c1e6ab4ab2a107d96f119950dc330e446dc2b0", "lessThan": "a35b29bdedb4d2ae3160d4d6684a6f1ecd9ca7c2", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/scsi/fnic/fdls_disc.c", "drivers/scsi/fnic/fnic.h", "drivers/scsi/fnic/fnic_fdls.h" ], "versions": [ { "version": "6.14", "status": "affected" }, { "version": "0", "lessThan": "6.14", "status": "unaffected", "versionType": "semver" }, { "version": "6.15.5", "lessThanOrEqual": "6.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.16", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "6.15.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "6.16" } ] } ] } ], "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" } } } }