{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-50677", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-09T01:26:45.991Z", "datePublished": "2025-12-09T01:29:30.418Z", "dateUpdated": "2026-08-05T08:59:23.537Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:59:23.537Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipmi: fix use after free in _ipmi_destroy_user()\n\nThe intf_free() function frees the \"intf\" pointer so we cannot\ndereference it again on the next line." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The UAF is reached by destroying an IPMI user via the local character-device path (close/release on /dev/ipmiN → ipmi_destroy_user → _ipmi_destroy_user) or the same teardown during local SMI unregister; no remote or adjacent packet path reaches this code.\nAC:H - module_put(intf->owner) only uses freed memory when intf is actually freed in the narrow window after the user kref_put and before that module_put, which requires a concurrent last-ref drop from ipmi_unregister_smi (rmmod/sysfs unbind/hot-remove) that a /dev/ipmi-only attacker cannot start.\nPR:L - ipmi_open/ipmi_create_user perform no capable() check; access is only gated by /dev/ipmiN DAC, and server/appliance deployments routinely grant that node to a non-root management group for ipmitool/freeipmi, matching established IPMI scoring.\nUI:N - The attacker drives open/close on their own IPMI fd; any concurrent unregister is an environmental teardown condition counted under Attack Complexity, not a separate victim interaction.\nS:U - This is a host-kernel heap use-after-free of struct ipmi_smi within the same OS security authority, with no VM escape, IOMMU bypass, or sandbox boundary crossing.\nC:H - After intf_free kfree()s the ipmi_smi, module_put(intf->owner) reads the owner pointer from freed slab (owner is the first field); reclaim/spray of that object yields an attacker-influenced pointer and a kernel read primitive, so confidentiality is High per UAF guidance.\nI:H - module_put() then performs atomic refcount updates through that stale/reclaimed module pointer, giving a write-into-freed-memory / decrement primitive that can corrupt module state or sprayed heap and enable control-flow hijack.\nA:H - Dereferencing the freed ipmi_smi for intf->owner readily oopses under poisoning/init_on_free/KASAN, and a corrupted module_put path can WARN/panic (panic_on_oops/warn), so availability impact is High." } ] } ], "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": "f9d405a4bd6090ffbf3bba5e2da6b44c0e013cb3", "lessThan": "35ad87bfe330f7ef6a19f772223c63296d643172", "status": "affected", "versionType": "git" }, { "version": "b642ced2cad496c32ae1f62b85fc395391190820", "lessThan": "d23006f2a56e11a3103de0ca8b843bf7fd7d76fc", "status": "affected", "versionType": "git" }, { "version": "cbb79863fc3175ed5ac506465948b02a893a8235", "lessThan": "f29d127b372e1b7662397d92341d9f7de198ff99", "status": "affected", "versionType": "git" }, { "version": "cbb79863fc3175ed5ac506465948b02a893a8235", "lessThan": "bfce073089cb81482521c65061835aaa6d1a6cc0", "status": "affected", "versionType": "git" }, { "version": "cbb79863fc3175ed5ac506465948b02a893a8235", "lessThan": "f7fde441198a9ecb130c3ccec91ee2131d6998ee", "status": "affected", "versionType": "git" }, { "version": "cbb79863fc3175ed5ac506465948b02a893a8235", "lessThan": "1fc9b20a7688000fcf4d7fbaa58e415a3cdda961", "status": "affected", "versionType": "git" }, { "version": "cbb79863fc3175ed5ac506465948b02a893a8235", "lessThan": "a92ce570c81dc0feaeb12a429b4bc65686d17967", "status": "affected", "versionType": "git" }, { "version": "4.19.92", "lessThan": "4.19.270", "status": "affected", "versionType": "semver" }, { "version": "5.4.7", "lessThan": "5.4.229", "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": "5.5", "status": "affected" }, { "version": "0", "lessThan": "5.5", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.270", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.229", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.163", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.87", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0.18", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.4", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.2", "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": "4.19.92", "versionEndExcluding": "4.19.270" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.7", "versionEndExcluding": "5.4.229" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.10.163" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.15.87" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.0.18" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.1.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/35ad87bfe330f7ef6a19f772223c63296d643172" }, { "url": "https://git.kernel.org/stable/c/d23006f2a56e11a3103de0ca8b843bf7fd7d76fc" }, { "url": "https://git.kernel.org/stable/c/f29d127b372e1b7662397d92341d9f7de198ff99" }, { "url": "https://git.kernel.org/stable/c/bfce073089cb81482521c65061835aaa6d1a6cc0" }, { "url": "https://git.kernel.org/stable/c/f7fde441198a9ecb130c3ccec91ee2131d6998ee" }, { "url": "https://git.kernel.org/stable/c/1fc9b20a7688000fcf4d7fbaa58e415a3cdda961" }, { "url": "https://git.kernel.org/stable/c/a92ce570c81dc0feaeb12a429b4bc65686d17967" } ], "title": "ipmi: fix use after free in _ipmi_destroy_user()", "x_generator": { "engine": "bippy-1.2.0" } } } }