cbcvebase.
CVE-2022-49196
published 2025-02-26

CVE-2022-49196: In the Linux kernel, the following vulnerability has been resolved: powerpc/pseries: Fix use after free in remove_phb_dynamic() In remove_phb_dynamic() we use…

PriorityP341high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.26%
17.3th percentile
In the Linux kernel, the following vulnerability has been resolved: powerpc/pseries: Fix use after free in remove_phb_dynamic() In remove_phb_dynamic() we use &phb->io_resource, after we've called device_unregister(&host_bridge->dev). But the unregister may have freed phb, because pcibios_free_controller_deferred() is the release function for the host_bridge. If there are no outstanding references when we call device_unregister() then phb will be freed out from under us. This has gone mainly unnoticed, but with slub_debug and page_poison enabled it can lead to a crash: PID: 7574 TASK: c0000000d492cb80 CPU: 13 COMMAND: "drmgr" #0 [c0000000e4f075a0] crash_kexec at c00000000027d7dc #1 [c0000000e4f075d0] oops_end at c000000000029608 #2 [c0000000e4f07650] __bad_page_fault at c0000000000904b4 #3 [c0000000e4f076c0] do_bad_slb_fault at c00000000009a5a8 #4 [c0000000e4f076f0] data_access_slb_common_virt at c000000000008b30 Data SLB Access [380] exception frame: R0: c000000000167250 R1: c0000000e4f07a00 R2: c000000002a46100 R3: c000000002b39ce8 R4: 00000000000000c0 R5: 00000000000000a9 R6: 3894674d000000c0 R7: 0000000000000000 R8: 00000000000000ff R9: 0000000000000100 R10: 6b6b6b6b6b6b6b6b R11: 0000000000008000 R12: c00000000023da80 R13: c0000009ffd38b00 R14: 0000000000000000 R15: 000000011c87f0f0 R16: 0000000000000006 R17: 0000000000000003 R18: 0000000000000002 R19: 0000000000000004 R20: 0000000000000005 R21: 000000011c87ede8 R22: 000000011c87c5a8 R23: 000000011c87d3a0 R24: 0000000000000000 R25: 0000000000000001 R26: c0000000e4f07cc8 R27: c00000004d1cc400 R28: c0080000031d00e8 R29: c00000004d23d800 R30: c00000004d1d2400 R31: c00000004d1d2540 NIP: c000000000167258 MSR: 8000000000009033 OR3: c000000000e9f474 CTR: 0000000000000000 LR: c000000000167250 XER: 0000000020040003 CCR: 0000000024088420 MQ: 0000000000000000 DAR: 6b6b6b6b6b6b6ba3 DSISR: c0000000e4f07920 Syscall Result: fffffffffffffff2 [NIP : release_resource+56] [LR : release_resource+48] #5 [c0000000e4f07a00] relea

Affected

17 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 5.17.3-1 (bookworm)linux 5.17.3-1 (bookworm)
linuxlinux——
linuxlinux——
linuxlinux——
linuxlinux>= 2dd9c11b9d4dfbd6c070eab7b81197f65e82f1a0 < 33d39efb61a84e055ca2386157d39ebbdf6b7d3133d39efb61a84e055ca2386157d39ebbdf6b7d31
linuxlinux>= 2dd9c11b9d4dfbd6c070eab7b81197f65e82f1a0 < 403f9e0bc5535a0a5184d1352fa3a70e6ffacb6f403f9e0bc5535a0a5184d1352fa3a70e6ffacb6f
linuxlinux>= 2dd9c11b9d4dfbd6c070eab7b81197f65e82f1a0 < 895ca4ae1f72e0a0160ab162723e59c9f265ec93895ca4ae1f72e0a0160ab162723e59c9f265ec93
linuxlinux>= 2dd9c11b9d4dfbd6c070eab7b81197f65e82f1a0 < fe2640bd7a62f1f7c3f55fbda31084085075bc30fe2640bd7a62f1f7c3f55fbda31084085075bc30
linuxlinux>= 3.16.39 < 3.173.17
linuxlinux>= 4.7.8 < 4.84.8
linuxlinux_kernel>= 0 < 5.17.3-15.17.3-1
linuxlinux_kernel>= 0 < 5.17.3-15.17.3-1
linuxlinux_kernel>= 0 < 5.17.3-15.17.3-1
linuxlinux_kernel>= 3.16.39 < 3.173.17
linuxlinux_kernel>= 4.7.8 < 5.15.335.15.33
linuxlinux_kernel>= 5.16 < 5.16.195.16.19
linuxlinux_kernel>= 5.17 < 5.17.25.17.2

CVSS provenance

nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
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