{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-46842", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-09-11T15:12:18.289Z", "datePublished": "2024-09-27T12:39:36.370Z", "dateUpdated": "2026-08-05T11:38:55.653Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:38:55.653Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: lpfc: Handle mailbox timeouts in lpfc_get_sfp_info\n\nThe MBX_TIMEOUT return code is not handled in lpfc_get_sfp_info and the\nroutine unconditionally frees submitted mailbox commands regardless of\nreturn status. The issue is that for MBX_TIMEOUT cases, when firmware\nreturns SFP information at a later time, that same mailbox memory region\nreferences previously freed memory in its cmpl routine.\n\nFix by adding checks for the MBX_TIMEOUT return code. During mailbox\nresource cleanup, check the mbox flag to make sure that the wait did not\ntimeout. If the MBOX_WAKE flag is not set, then do not free the resources\nbecause it will be freed when firmware completes the mailbox at a later\ntime in its cmpl routine.\n\nAlso, increase the timeout from 30 to 60 seconds to accommodate boot\nscripts requiring longer timeouts." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The only path to the vulnerable function is a read of the sysfs attribute /sys/class/scsi_host/hostN/lpfc_xcvr_data, which requires local system access. The remote FC RDP ELS path uses the separate async lpfc_get_rdp_info() and is not affected.\nAC:L - The attacker creates the timeout condition themselves: the sysfs handler has no serialization or rate limiting, and all mailbox commands are drained serially from an unbounded FIFO, so many concurrent readers push individual waits past the 30-second window. Timeouts are demonstrably reachable in ordinary operation, as the fix itself raises the timeout to 60s for boot scripts.\nPR:L - The attribute is declared DEVICE_ATTR_RO (mode 0444) in the unconditional lpfc_hba_attrs[] group, so any local unprivileged account can read it with no capability check in lpfc_xcvr_data_show(). Only a basic local user account is needed.\nUI:N - The attacker performs the sysfs read themselves; no victim action or cooperation is required.\nS:U - The corruption is confined to kernel heap and driver structures within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The freed LPFC_MBOXQ_t and its DMA buffer are recycled while the HBA still writes SFP page data into them, and the stale completion path reads pointers and a function pointer out of reallocated memory, giving a use-after-free read primitive over arbitrary reclaimed kernel objects.\nI:H - The mbox is memset and re-issued while still on psli->mboxq (list corruption), then double-freed via mempool_free plus lpfc_sli4_mbox_cmd_free on reclaimed memory, yielding arbitrary-pointer free and an indirect call through mbox_cmpl read from attacker-groomed heap — exploitable for control-flow hijack.\nA:H - The use-after-free, double free, and doubly-linked-list corruption of the mailbox queue reliably produce an oops or panic, and the attacker can repeat the sysfs read to retrigger it at will." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/scsi/lpfc/lpfc_els.c" ], "versions": [ { "version": "479b0917e4477f49df2e3be454aac3cfa5dec171", "lessThan": "bba47fe3b038cca3d3ebd799665ce69d6d273b58", "status": "affected", "versionType": "git" }, { "version": "479b0917e4477f49df2e3be454aac3cfa5dec171", "lessThan": "ede596b1434b57c0b3fd5c02b326efe5c54f6e48", "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/lpfc/lpfc_els.c" ], "versions": [ { "version": "6.2", "status": "affected" }, { "version": "0", "lessThan": "6.2", "status": "unaffected", "versionType": "semver" }, { "version": "6.10.10", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11", "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": "6.2", "versionEndExcluding": "6.10.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.11" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/bba47fe3b038cca3d3ebd799665ce69d6d273b58" }, { "url": "https://git.kernel.org/stable/c/ede596b1434b57c0b3fd5c02b326efe5c54f6e48" } ], "title": "scsi: lpfc: Handle mailbox timeouts in lpfc_get_sfp_info", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-09-29T13:59:24.823160Z", "id": "CVE-2024-46842", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-29T13:59:29.321Z" } } ] } }