{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49196", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T01:49:39.290Z", "datePublished": "2025-02-26T01:55:40.626Z", "dateUpdated": "2026-05-23T15:21:44.020Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-23T15:21:44.020Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/pseries: Fix use after free in remove_phb_dynamic()\n\nIn remove_phb_dynamic() we use &phb->io_resource, after we've called\ndevice_unregister(&host_bridge->dev). But the unregister may have freed\nphb, because pcibios_free_controller_deferred() is the release function\nfor the host_bridge.\n\nIf there are no outstanding references when we call device_unregister()\nthen phb will be freed out from under us.\n\nThis has gone mainly unnoticed, but with slub_debug and page_poison\nenabled it can lead to a crash:\n\n PID: 7574 TASK: c0000000d492cb80 CPU: 13 COMMAND: \"drmgr\"\n #0 [c0000000e4f075a0] crash_kexec at c00000000027d7dc\n #1 [c0000000e4f075d0] oops_end at c000000000029608\n #2 [c0000000e4f07650] __bad_page_fault at c0000000000904b4\n #3 [c0000000e4f076c0] do_bad_slb_fault at c00000000009a5a8\n #4 [c0000000e4f076f0] data_access_slb_common_virt at c000000000008b30\n Data SLB Access [380] exception frame:\n R0: c000000000167250 R1: c0000000e4f07a00 R2: c000000002a46100\n R3: c000000002b39ce8 R4: 00000000000000c0 R5: 00000000000000a9\n R6: 3894674d000000c0 R7: 0000000000000000 R8: 00000000000000ff\n R9: 0000000000000100 R10: 6b6b6b6b6b6b6b6b R11: 0000000000008000\n R12: c00000000023da80 R13: c0000009ffd38b00 R14: 0000000000000000\n R15: 000000011c87f0f0 R16: 0000000000000006 R17: 0000000000000003\n R18: 0000000000000002 R19: 0000000000000004 R20: 0000000000000005\n R21: 000000011c87ede8 R22: 000000011c87c5a8 R23: 000000011c87d3a0\n R24: 0000000000000000 R25: 0000000000000001 R26: c0000000e4f07cc8\n R27: c00000004d1cc400 R28: c0080000031d00e8 R29: c00000004d23d800\n R30: c00000004d1d2400 R31: c00000004d1d2540\n NIP: c000000000167258 MSR: 8000000000009033 OR3: c000000000e9f474\n CTR: 0000000000000000 LR: c000000000167250 XER: 0000000020040003\n CCR: 0000000024088420 MQ: 0000000000000000 DAR: 6b6b6b6b6b6b6ba3\n DSISR: c0000000e4f07920 Syscall Result: fffffffffffffff2\n [NIP : release_resource+56]\n [LR : release_resource+48]\n #5 [c0000000e4f07a00] release_resource at c000000000167258 (unreliable)\n #6 [c0000000e4f07a30] remove_phb_dynamic at c000000000105648\n #7 [c0000000e4f07ab0] dlpar_remove_slot at c0080000031a09e8 [rpadlpar_io]\n #8 [c0000000e4f07b50] remove_slot_store at c0080000031a0b9c [rpadlpar_io]\n #9 [c0000000e4f07be0] kobj_attr_store at c000000000817d8c\n #10 [c0000000e4f07c00] sysfs_kf_write at c00000000063e504\n #11 [c0000000e4f07c20] kernfs_fop_write_iter at c00000000063d868\n #12 [c0000000e4f07c70] new_sync_write at c00000000054339c\n #13 [c0000000e4f07d10] vfs_write at c000000000546624\n #14 [c0000000e4f07d60] ksys_write at c0000000005469f4\n #15 [c0000000e4f07db0] system_call_exception at c000000000030840\n #16 [c0000000e4f07e10] system_call_vectored_common at c00000000000c168\n\nTo avoid it, we can take a reference to the host_bridge->dev until we're\ndone using phb. Then when we drop the reference the phb will be freed." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "arch/powerpc/platforms/pseries/pci_dlpar.c" ], "versions": [ { "version": "2dd9c11b9d4dfbd6c070eab7b81197f65e82f1a0", "lessThan": "33d39efb61a84e055ca2386157d39ebbdf6b7d31", "status": "affected", "versionType": "git" }, { "version": "2dd9c11b9d4dfbd6c070eab7b81197f65e82f1a0", "lessThan": "403f9e0bc5535a0a5184d1352fa3a70e6ffacb6f", "status": "affected", "versionType": "git" }, { "version": "2dd9c11b9d4dfbd6c070eab7b81197f65e82f1a0", "lessThan": "895ca4ae1f72e0a0160ab162723e59c9f265ec93", "status": "affected", "versionType": "git" }, { "version": "2dd9c11b9d4dfbd6c070eab7b81197f65e82f1a0", "lessThan": "fe2640bd7a62f1f7c3f55fbda31084085075bc30", "status": "affected", "versionType": "git" }, { "version": "c3e740838fe3117413425c956ac56a5724ccd9f9", "status": "affected", "versionType": "git" }, { "version": "83573addff2b4e16df9fad9a561a0d77d554b370", "status": "affected", "versionType": "git" }, { "version": "3.16.39", "lessThan": "3.17", "status": "affected", "versionType": "semver" }, { "version": "4.7.8", "lessThan": "4.8", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "arch/powerpc/platforms/pseries/pci_dlpar.c" ], "versions": [ { "version": "4.8", "status": "affected" }, { "version": "0", "lessThan": "4.8", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.33", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.16.19", "lessThanOrEqual": "5.16.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.17.2", "lessThanOrEqual": "5.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.18", "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": "4.8", "versionEndExcluding": "5.15.33" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "5.16.19" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "5.17.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "5.18" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16.39" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7.8" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/33d39efb61a84e055ca2386157d39ebbdf6b7d31" }, { "url": "https://git.kernel.org/stable/c/403f9e0bc5535a0a5184d1352fa3a70e6ffacb6f" }, { "url": "https://git.kernel.org/stable/c/895ca4ae1f72e0a0160ab162723e59c9f265ec93" }, { "url": "https://git.kernel.org/stable/c/fe2640bd7a62f1f7c3f55fbda31084085075bc30" } ], "title": "powerpc/pseries: Fix use after free in remove_phb_dynamic()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "problemTypes": [ { "descriptions": [ { "type": "CWE", "cweId": "CWE-416", "lang": "en", "description": "CWE-416 Use After Free" } ] } ], "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "timestamp": "2025-03-04T18:03:23.162575Z", "id": "CVE-2022-49196", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-05-01T17:19:08.367Z" } } ] } }