CVE-2022-49530 (GCVE-0-2022-49530)
Vulnerability from cvelistv5
Published
2025-02-26 02:13
Modified
2026-08-05 08:55
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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: 841686df9f7d2942cfd94d024b8591fa3f74ef7c
Version: 841686df9f7d2942cfd94d024b8591fa3f74ef7c
Version: 841686df9f7d2942cfd94d024b8591fa3f74ef7c
Version: 841686df9f7d2942cfd94d024b8591fa3f74ef7c
Version: 841686df9f7d2942cfd94d024b8591fa3f74ef7c
Version: 841686df9f7d2942cfd94d024b8591fa3f74ef7c
Version: 841686df9f7d2942cfd94d024b8591fa3f74ef7c
Version: 841686df9f7d2942cfd94d024b8591fa3f74ef7c
Version: 841686df9f7d2942cfd94d024b8591fa3f74ef7c
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          "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."
        }
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              "value": "AV:L - The bug is reached only during local amdgpu PCI probe (amdgpu_device_ip_init \u2192 si_dpm_sw_init \u2192 si_dpm_init \u2192 si_parse_power_table) on Southern Islands GPUs; suspend/resume and GPU reset use hw callbacks and do not re-parse the power table, and no network path exists.\nAC:L - A local attacker can induce system-wide memory pressure so a mid-loop GFP_KERNEL kzalloc of struct si_ps fails; once that happens, the premature kfree of adev-\u003epm.dpm.ps followed by si_dpm_fini\u2019s second free is deterministic with no uncontrolled race.\nPR:L - Scored from an unprivileged local account on a shared system with an affected SI GPU under the higher-severity interpretation, consistent with sibling double-frees CVE-2023-52691 and CVE-2023-52469; real root is not required for the attacker\u2019s privileges prior to exploitation.\nUI:N - No separate victim action such as opening a file or mounting a device is required; the flaw is triggered by driver initialization under attacker-influenced memory conditions.\nS:U - Impact remains within the host kernel\u2019s security authority as standard kernel heap corruption / privilege escalation, with no VM escape, IOMMU bypass, or other security-boundary crossing.\nC:H - Double-free of the adev-\u003epm.dpm.ps heap object (with a dangling non-NULL pointer) is UAF-class memory corruption; reclaiming the freed slab enables arbitrary kernel read primitives.\nI:H - Double-free freelist corruption in the kernel allocator can be abused for overlapping objects and arbitrary write / control-flow hijacking, enabling full integrity compromise and privilege escalation.\nA:H - The double-free reliably corrupts kernel heap state and can oops/panic the kernel even when not fully exploited for code execution, which is Availability High under kernel CVSS guidance."
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      "title": "drm/amd/pm: fix double free in si_parse_power_table()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49530",
    "datePublished": "2025-02-26T02:13:51.057Z",
    "dateReserved": "2025-02-26T02:08:31.588Z",
    "dateUpdated": "2026-08-05T08:55:26.829Z",
    "state": "PUBLISHED"
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\"https://git.kernel.org/stable/c/ca1ce206894dd976275c78ee38dbc19873f22de9\"}, {\"url\": \"https://git.kernel.org/stable/c/a5ce7051db044290b1a95045ff03c249005a3aa4\"}, {\"url\": \"https://git.kernel.org/stable/c/fd2eff8b9dcbe469c3b7bbbc7083ab5ed94de07b\"}, {\"url\": \"https://git.kernel.org/stable/c/43eb9b667b95f2a31c63e8949b0d2161b9be59c3\"}, {\"url\": \"https://git.kernel.org/stable/c/f3fa2becf2fc25b6ac7cf8d8b1a2e4a86b3b72bd\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"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.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.9.318\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.283\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.247\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.198\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.121\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.46\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.17.14\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.18.3\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.19\", \"versionStartIncluding\": \"4.9\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T19:01:42.941Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-49530\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T19:01:42.941Z\", \"dateReserved\": \"2025-02-26T02:08:31.588Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-02-26T02:13:51.057Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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