CVE-2022-49530 (GCVE-0-2022-49530)
Vulnerability from cvelistv5
Published
2025-02-26 02:13
Modified
2025-05-04 08:39
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
drm/amd/pm: fix double free in si_parse_power_table()
In function si_parse_power_table(), array adev->pm.dpm.ps and its member
is allocated. If the allocation of each member fails, the array itself
is freed and returned with an error code. However, the array is later
freed again in si_dpm_fini() function which is called when the function
returns an error.
This leads to potential double free of the array adev->pm.dpm.ps, as
well as leak of its array members, since the members are not freed in
the allocation function and the array is not nulled when freed.
In addition adev->pm.dpm.num_ps, which keeps track of the allocated
array member, is not updated until the member allocation is
successfully finished, this could also lead to either use after free,
or uninitialized variable access in si_dpm_fini().
Fix this by postponing the free of the array until si_dpm_fini() and
increment adev->pm.dpm.num_ps everytime the array member is allocated.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| ► | Linux | Linux |
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 |
|
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"nvd": "{\"cve\":{\"id\":\"CVE-2022-49530\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-26T07:01:28.967\",\"lastModified\":\"2025-03-10T21:15:50.760\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/amd/pm: fix double free in si_parse_power_table()\\n\\nIn function si_parse_power_table(), array adev-\u003epm.dpm.ps and its member\\nis allocated. If the allocation of each member fails, the array itself\\nis freed and returned with an error code. However, the array is later\\nfreed again in si_dpm_fini() function which is called when the function\\nreturns an error.\\n\\nThis leads to potential double free of the array adev-\u003epm.dpm.ps, as\\nwell as leak of its array members, since the members are not freed in\\nthe allocation function and the array is not nulled when freed.\\nIn addition adev-\u003epm.dpm.num_ps, which keeps track of the allocated\\narray member, is not updated until the member allocation is\\nsuccessfully finished, this could also lead to either use after free,\\nor uninitialized variable access in si_dpm_fini().\\n\\nFix this by postponing the free of the array until si_dpm_fini() and\\nincrement adev-\u003epm.dpm.num_ps everytime the array member is allocated.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/amd/pm: se corrige la doble liberaci\u00f3n en si_parse_power_table() En la funci\u00f3n si_parse_power_table(), se asigna la matriz adev-\u0026gt;pm.dpm.ps y su miembro. 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