cbcvebase.
CVE-2022-49436
published 2025-02-26

CVE-2022-49436: In the Linux kernel, the following vulnerability has been resolved: powerpc/papr_scm: Fix leaking nvdimm_events_map elements Right now 'char *' elements…

PriorityP418medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.22%
12.3th percentile
In the Linux kernel, the following vulnerability has been resolved: powerpc/papr_scm: Fix leaking nvdimm_events_map elements Right now 'char *' elements allocated for individual 'stat_id' in 'papr_scm_priv.nvdimm_events_map[]' during papr_scm_pmu_check_events(), get leaked in papr_scm_remove() and papr_scm_pmu_register(), papr_scm_pmu_check_events() error paths. Also individual 'stat_id' arent NULL terminated 'char *' instead they are fixed 8-byte sized identifiers. However papr_scm_pmu_register() assumes it to be a NULL terminated 'char *' and at other places it assumes it to be a 'papr_scm_perf_stat.stat_id' sized string which is 8-byes in size. Fix this by allocating the memory for papr_scm_priv.nvdimm_events_map to also include space for 'stat_id' entries. This is possible since number of available events/stat_ids are known upfront. This saves some memory and one extra level of indirection from 'nvdimm_events_map' to 'stat_id'. Also rest of the code can continue to call 'kfree(papr_scm_priv.nvdimm_events_map)' without needing to iterate over the array and free up individual elements.

Affected

8 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 5.18.5-1 (bookworm)linux 5.18.5-1 (bookworm)
linuxlinux——
linuxlinux>= 4c08d4bbc089a95f3f38389c2b79dbc6ab24f10b < b073096df4dec70d0436321b7093bad27ae91f9eb073096df4dec70d0436321b7093bad27ae91f9e
linuxlinux>= 4c08d4bbc089a95f3f38389c2b79dbc6ab24f10b < 0e0946e22f3665d27325d389ff45ade6e93f36780e0946e22f3665d27325d389ff45ade6e93f3678
linuxlinux_kernel>= 0 < 5.18.5-15.18.5-1
linuxlinux_kernel>= 0 < 5.18.5-15.18.5-1
linuxlinux_kernel>= 0 < 5.18.5-15.18.5-1
linuxlinux_kernel>= 5.18 < 5.18.35.18.3

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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