{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-81005", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.812Z", "datePublished": "2026-09-11T19:42:57.460Z", "dateUpdated": "2026-10-19T08:46:29.573Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:46:29.573Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipmi: si: Fix NULL pointer dereference after failed registration\n\ntry_smi_init() allocates new_smi->si_sm and later calls\nipmi_register_smi_mod(), which maps to ipmi_add_smi().\n\nDuring ipmi_add_smi(), the upper IPMI message handler obtains the\ninitial BMC device information through __bmc_get_device_id(). This can\nfail if the BMC does not return a successful response to the Get Device\nID command.\n\nWhen the BMC returns a nonzero completion code, the device-id helper\nretries the command and eventually returns -EIO if the device ID still\ncannot be fetched.\n\nOn this failure path, ipmi_add_smi() logs \"Unable to get the device id\"\nand goes to out_err_started, where it invokes the lower driver's\nshutdown callback. try_smi_init() then logs the returned registration\nfailure:\n\n ipmi_si IPI0001:00: IPMI message handler: Unable to get the device id: -5\n ipmi_si IPI0001:00: Unable to register device: error -5\n\nFor ipmi_si, the shutdown callback is shutdown_smi(), which cleans up\nthe SI state machine data, frees smi_info->si_sm, and sets\nsmi_info->si_sm and smi_info->intf to NULL.\n\nHowever, intf->in_shutdown is not set on this failed-registration\nrollback path. Therefore, the asynchronous redo_bmc_reg work item can\nstill retry BMC device-id probing after the lower driver has already\ncleared its SI state machine data. In the observed case, that retry path\nreached start_next_msg(), which passed the NULL smi_info->si_sm pointer\nto the selected KCS state machine handler:\n\nBUG: unable to handle kernel NULL pointer dereference at 0000000000000000\nWorkqueue: events redo_bmc_reg [ipmi_msghandler]\nRIP: start_kcs_transaction+0x2c/0x190 [ipmi_si]\nCall Trace:\n start_next_msg+0x50/0x80 [ipmi_si]\n check_start_timer_thread.part.9+0x3b/0x50 [ipmi_si]\n sender+0x69/0x80 [ipmi_si]\n i_ipmi_request+0x2ac/0x9d0 [ipmi_msghandler]\n __get_device_id.isra.29+0xaa/0x180 [ipmi_msghandler]\n __bmc_get_device_id+0xef/0x950 [ipmi_msghandler]\n redo_bmc_reg+0x52/0x60 [ipmi_msghandler]\n process_one_work+0x1a7/0x360\n\nSet intf->in_shutdown on the out_err_started path before invoking the\nlower driver's shutdown callback. This prevents later redo_bmc_reg\nretries from using an interface whose lower driver state has been\ncleaned up, and applies the same shutdown state to other IPMI interfaces\nas well." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/char/ipmi/ipmi_msghandler.c" ], "versions": [ { "version": "2512e40e48d21d8bac09f7e91d2c3ceb2d3b50b2", "lessThan": "75ecc80ef0614a9f8441ab476fb748d3e919bea8", "status": "affected", "versionType": "git" }, { "version": "2512e40e48d21d8bac09f7e91d2c3ceb2d3b50b2", "lessThan": "b11a1e545ad7a2f8f9ba7276b4ae9429c3399456", "status": "affected", "versionType": "git" }, { "version": "2512e40e48d21d8bac09f7e91d2c3ceb2d3b50b2", "lessThan": "f390b0e781ca689515b659f94ef05f01497ed833", "status": "affected", "versionType": "git" }, { "version": "2512e40e48d21d8bac09f7e91d2c3ceb2d3b50b2", "lessThan": "d377bf743f29b41729a084a633874ef9c1a13c6a", "status": "affected", "versionType": "git" }, { "version": "2512e40e48d21d8bac09f7e91d2c3ceb2d3b50b2", "lessThan": "d4be659a3e56f4eb16039ab8a1162efea086a714", "status": "affected", "versionType": "git" }, { "version": "2512e40e48d21d8bac09f7e91d2c3ceb2d3b50b2", "lessThan": "53af3a8bae0a93c1342e1b5519812203332aca8e", "status": "affected", "versionType": "git" }, { "version": "2512e40e48d21d8bac09f7e91d2c3ceb2d3b50b2", "lessThan": "8ada17dd4c4ffd6b94621e735d77eda196ce118f", "status": "affected", "versionType": "git" }, { "version": "2512e40e48d21d8bac09f7e91d2c3ceb2d3b50b2", "lessThan": "6d920a75df9a83ab096b3cde7a643b656e4fdfeb", "status": "affected", "versionType": "git" }, { "version": "288bd736c8a027040fc261c86a87b65e7bc3f6fa", "status": "affected", "versionType": "git" }, { "version": "4.18.10", "lessThan": "4.19", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/char/ipmi/ipmi_msghandler.c" ], "versions": [ { "version": "4.19", "status": "affected" }, { "version": "0", "lessThan": "4.19", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3", "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": "4.19", "versionEndExcluding": "5.10.270" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "5.15.221" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.1.188" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.6.157" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.12.109" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.18.50" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "7.2.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "7.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18.10" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/75ecc80ef0614a9f8441ab476fb748d3e919bea8" }, { "url": "https://git.kernel.org/stable/c/b11a1e545ad7a2f8f9ba7276b4ae9429c3399456" }, { "url": "https://git.kernel.org/stable/c/f390b0e781ca689515b659f94ef05f01497ed833" }, { "url": "https://git.kernel.org/stable/c/d377bf743f29b41729a084a633874ef9c1a13c6a" }, { "url": "https://git.kernel.org/stable/c/d4be659a3e56f4eb16039ab8a1162efea086a714" }, { "url": "https://git.kernel.org/stable/c/53af3a8bae0a93c1342e1b5519812203332aca8e" }, { "url": "https://git.kernel.org/stable/c/8ada17dd4c4ffd6b94621e735d77eda196ce118f" }, { "url": "https://git.kernel.org/stable/c/6d920a75df9a83ab096b3cde7a643b656e4fdfeb" } ], "title": "ipmi: si: Fix NULL pointer dereference after failed registration", "x_generator": { "engine": "bippy-1.2.0" } } } }