CVE-2022-49784

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Source
https://cve.org/CVERecord?id=CVE-2022-49784
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49784.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2022-49784
Downstream
Related
Published
2025-05-01T14:09:17.695Z
Modified
2026-03-11T07:15:16.662218Z
Summary
perf/x86/amd/uncore: Fix memory leak for events array
Details

In the Linux kernel, the following vulnerability has been resolved:

perf/x86/amd/uncore: Fix memory leak for events array

When a CPU comes online, the per-CPU NB and LLC uncore contexts are freed but not the events array within the context structure. This causes a memory leak as identified by the kmemleak detector.

[...] unreferenced object 0xffff8c5944b8e320 (size 32): comm "swapper/0", pid 1, jiffies 4294670387 (age 151.072s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000000759fb79>] amduncorecpuupprepare+0xaf/0x230 [<00000000ddc9e126>] cpuhpinvokecallback+0x2cf/0x470 [<0000000093e727d4>] cpuhpissuecall+0x14d/0x170 [<0000000045464d54>] __cpuhpsetupstate_cpuslocked+0x11e/0x330 [<0000000069f67cbd>] __cpuhpsetupstate+0x6b/0x110 [<0000000015365e0f>] amd_uncoreinit+0x260/0x321 [<00000000089152d2>] dooneinitcall+0x3f/0x1f0 [<000000002d0bd18d>] kernelinitfreeable+0x1ca/0x212 [<0000000030be8dde>] kernelinit+0x11/0x120 [<0000000059709e59>] retfromfork+0x22/0x30 unreferenced object 0xffff8c5944b8dd40 (size 64): comm "swapper/0", pid 1, jiffies 4294670387 (age 151.072s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000306efe8b>] amduncorecpuupprepare+0x183/0x230 [<00000000ddc9e126>] cpuhpinvokecallback+0x2cf/0x470 [<0000000093e727d4>] cpuhpissuecall+0x14d/0x170 [<0000000045464d54>] __cpuhpsetupstate_cpuslocked+0x11e/0x330 [<0000000069f67cbd>] _cpuhpsetupstate+0x6b/0x110 [<0000000015365e0f>] amduncoreinit+0x260/0x321 [<00000000089152d2>] dooneinitcall+0x3f/0x1f0 [<000000002d0bd18d>] kernelinitfreeable+0x1ca/0x212 [<0000000030be8dde>] kernelinit+0x11/0x120 [<0000000059709e59>] retfromfork+0x22/0x30 [...]

Fix the problem by freeing the events array before freeing the uncore context.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49784.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
39621c5808f5dda75d03dc4b2d4d2b13a5a1c34b
Fixed
f75be9885d49e3717de962345c4572ddab52b178
Fixed
bdfe34597139cfcecd47a2eb97fea44d77157491

Affected versions

v5.*
v5.19
v5.19-rc3
v5.19-rc4
v5.19-rc5
v5.19-rc6
v5.19-rc7
v5.19-rc8
v6.*
v6.0
v6.0-rc1
v6.0-rc2
v6.0-rc3
v6.0-rc4
v6.0-rc5
v6.0-rc6
v6.0-rc7
v6.0.1
v6.0.2
v6.0.3
v6.0.4
v6.0.5
v6.0.6
v6.0.7
v6.0.8
v6.0.9
v6.1-rc1
v6.1-rc2
v6.1-rc3
v6.1-rc4

Database specific

vanir_signatures 
[
    {
        "signature_type": "Function",
        "signature_version": "v1",
        "target": {
            "file": "arch/x86/events/amd/uncore.c",
            "function": "uncore_clean_online"
        },
        "id": "CVE-2022-49784-12bd8daf",
        "deprecated": false,
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@bdfe34597139cfcecd47a2eb97fea44d77157491",
        "digest": {
            "function_hash": "138331147804805638851038710843549549633",
            "length": 185.0
        }
    },
    {
        "signature_type": "Function",
        "signature_version": "v1",
        "target": {
            "file": "arch/x86/events/amd/uncore.c",
            "function": "uncore_clean_online"
        },
        "id": "CVE-2022-49784-2dc20bfd",
        "deprecated": false,
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@f75be9885d49e3717de962345c4572ddab52b178",
        "digest": {
            "function_hash": "138331147804805638851038710843549549633",
            "length": 185.0
        }
    },
    {
        "signature_type": "Line",
        "signature_version": "v1",
        "target": {
            "file": "arch/x86/events/amd/uncore.c"
        },
        "id": "CVE-2022-49784-55b15090",
        "deprecated": false,
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@f75be9885d49e3717de962345c4572ddab52b178",
        "digest": {
            "line_hashes": [
                "181180899582266149785191880045677211287",
                "276101935781763025137018848947803783055",
                "182797600511125342051260085263803581824",
                "172648177076713874682864192783968217584"
            ],
            "threshold": 0.9
        }
    },
    {
        "signature_type": "Line",
        "signature_version": "v1",
        "target": {
            "file": "arch/x86/events/amd/uncore.c"
        },
        "id": "CVE-2022-49784-8dad3a90",
        "deprecated": false,
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@bdfe34597139cfcecd47a2eb97fea44d77157491",
        "digest": {
            "line_hashes": [
                "181180899582266149785191880045677211287",
                "276101935781763025137018848947803783055",
                "182797600511125342051260085263803581824",
                "172648177076713874682864192783968217584"
            ],
            "threshold": 0.9
        }
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49784.json"