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CVE-2022-49436

powerpc/papr_scm: Fix leaking nvdimm_events_map elements

Medium5.5EPSS 0.22%
Published
Updated
Reserved
Assigned by
Linux

Description

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.

Scores

CVSS scores of CVE-2022-49436, by who scored it
Scored byCVSSScoreVector
NVDNVD · Analyzed3.1Medium5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.22% · top 87% of all CVEs (6 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.

Weakness

Affected products

  • Linux · Linux

    • affected 4c08d4bbc089a95f3f38389c2b79dbc6ab24f10b – < b073096df4dec70d0436321b7093bad27ae91f9e
    • affected 4c08d4bbc089a95f3f38389c2b79dbc6ab24f10b – < 0e0946e22f3665d27325d389ff45ade6e93f3678

  • Linux · Linux

    • affected 5.18
    • unaffected < 5.18
    • unaffected 5.18.3 – ≤ 5.18.*
    • unaffected 5.19 – ≤ *

References (2)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .