{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63890", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.018Z", "datePublished": "2026-07-19T14:55:02.195Z", "dateUpdated": "2026-07-19T14:55:02.195Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-19T14:55:02.195Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: fcoe: Reject FIP descriptors with zero fip_dlen in CVL walker\n\ndrivers/scsi/fcoe/fcoe_ctlr.c::fcoe_ctlr_recv_clr_vlink() advanced the\ndescriptor cursor by an attacker-supplied fip_dlen without ever\nrequiring dlen >= sizeof(struct fip_desc) in the default branch. The\nnamed descriptor cases (FIP_DT_MAC, FIP_DT_NAME, FIP_DT_VN_ID) checked\ntheir per-type minimum lengths, but a FIP_DT_NON_CRITICAL descriptor\n(fip_dtype >= 128, which the standard requires receivers to silently\nignore) skipped that check entirely.\n\nAn unauthenticated L2 peer on the FCoE control VLAN could hang\nfcoe_ctlr_recv_work on an fcoe, qedf, or bnx2fc initiator indefinitely\nby emitting one FIP CVL frame whose single descriptor had fip_dtype ==\nFIP_DT_NON_CRITICAL and fip_dlen == 0: the cursor advanced zero bytes\nper iteration and the loop condition rlen >= sizeof(*desc) stayed true\nforever, blocking every subsequent FIP frame on that controller.\n\nTighten the outer dlen guard to also reject dlen < sizeof(struct\nfip_desc), so a malformed descriptor whose length cannot even cover the\ndescriptor header is rejected before the switch. This is the same\nlower-bound the named cases already apply and is the minimum scope that\ncloses the loop."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/scsi/fcoe/fcoe_ctlr.c"], "versions": [{"version": "97c8389d54b9665c38105ea72a428a44b97ff2f6", "lessThan": "d179949d2175d2857d1c3a275a22bea58bcc5d36", "status": "affected", "versionType": "git"}, {"version": "97c8389d54b9665c38105ea72a428a44b97ff2f6", "lessThan": "fda976f7390bb5d1e9b84ef11ebb17323038e0c6", "status": "affected", "versionType": "git"}, {"version": "97c8389d54b9665c38105ea72a428a44b97ff2f6", "lessThan": "80a0cd307205236ca28aa49bc553f58edcb9bf3a", "status": "affected", "versionType": "git"}, {"version": "97c8389d54b9665c38105ea72a428a44b97ff2f6", "lessThan": "0e3c6e5a8fc15a74dfb1e0c1df9f1da73600a81a", "status": "affected", "versionType": "git"}, {"version": "97c8389d54b9665c38105ea72a428a44b97ff2f6", "lessThan": "549859a1131052b07dff11a448e9f3221a40f260", "status": "affected", "versionType": "git"}, {"version": "97c8389d54b9665c38105ea72a428a44b97ff2f6", "lessThan": "14dd80a20a72ce334adcc2d67402360527065948", "status": "affected", "versionType": "git"}, {"version": "97c8389d54b9665c38105ea72a428a44b97ff2f6", "lessThan": "d537d29d51c8b808469e5adacf3e5a0092700738", "status": "affected", "versionType": "git"}, {"version": "97c8389d54b9665c38105ea72a428a44b97ff2f6", "lessThan": "9eed1bd59937e6828b00d2f2dfef631d964f3636", "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/fcoe/fcoe_ctlr.c"], "versions": [{"version": "2.6.30", "status": "affected"}, {"version": "0", "lessThan": "2.6.30", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.259", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.210", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.176", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.93", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.35", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.12", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "2.6.30", "versionEndExcluding": "5.10.259"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "5.15.210"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.1.176"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.6.143"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.12.93"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.18.35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "7.0.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d179949d2175d2857d1c3a275a22bea58bcc5d36"}, {"url": "https://git.kernel.org/stable/c/fda976f7390bb5d1e9b84ef11ebb17323038e0c6"}, {"url": "https://git.kernel.org/stable/c/80a0cd307205236ca28aa49bc553f58edcb9bf3a"}, {"url": "https://git.kernel.org/stable/c/0e3c6e5a8fc15a74dfb1e0c1df9f1da73600a81a"}, {"url": "https://git.kernel.org/stable/c/549859a1131052b07dff11a448e9f3221a40f260"}, {"url": "https://git.kernel.org/stable/c/14dd80a20a72ce334adcc2d67402360527065948"}, {"url": "https://git.kernel.org/stable/c/d537d29d51c8b808469e5adacf3e5a0092700738"}, {"url": "https://git.kernel.org/stable/c/9eed1bd59937e6828b00d2f2dfef631d964f3636"}], "title": "scsi: fcoe: Reject FIP descriptors with zero fip_dlen in CVL walker", "x_generator": {"engine": "bippy-1.2.0"}}}}

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