ASB-A-169505929

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Import Source
https://storage.googleapis.com/android-osv-test/ASB-A-169505929.json
JSON Data
https://api.test.osv.dev/v1/vulns/ASB-A-169505929
Aliases
Published
2021-10-01T00:00:00Z
Modified
2026-03-11T05:57:40Z
Summary
[none]
Details

In ib_prctl_set of bugs.c, there is a possible way to re-enable indirect branch speculation due to a permissions bypass. This could lead to local information disclosure via a Spectre v2 attack with no additional execution privileges needed. User interaction is not needed for exploitation.

References

Affected packages

Android / :linux_kernel:

Package

Name
:linux_kernel:

Affected ranges

Type
ECOSYSTEM
Events
Introduced
:0
Fixed
:2021-10-05

Affected versions

Other
Kernel

Ecosystem specific 

{
    "fixes":  [
        "https://android.googlesource.com/kernel/common/+/4d8df8cbb9156b0a0ab3f802b80cb5db57acc0bf"
    ],
    "severity":  "High",
    "spl":  "2021-10-05",
    "types":  [
        "ID"
    ],
    "vanir_signatures":  [
        {
            "deprecated":  false,
            "digest":  {
                "function_hash":  "337582401683084583128489187843894130475",
                "length":  949
            },
            "id":  "ASB-A-169505929-8ef931fc",
            "signature_type":  "Function",
            "signature_version":  "v1",
            "source":  "https://android.googlesource.com/kernel/common/+/4d8df8cbb9156b0a0ab3f802b80cb5db57acc0bf",
            "target":  {
                "file":  "arch/x86/kernel/cpu/bugs.c",
                "function":  "ib_prctl_set"
            }
        },
        {
            "deprecated":  false,
            "digest":  {
                "line_hashes":  [
                    "96293375478824141631754960072640988953",
                    "36152342845344979984605625203388829799",
                    "8460226663272733964146612779976990208",
                    "138461365038257326585673897414895695562",
                    "47823671850491995274274841138110324739",
                    "237551085397149107198675647758349576371"
                ],
                "threshold":  0.9
            },
            "id":  "ASB-A-169505929-e316d259",
            "signature_type":  "Line",
            "signature_version":  "v1",
            "source":  "https://android.googlesource.com/kernel/common/+/4d8df8cbb9156b0a0ab3f802b80cb5db57acc0bf",
            "target":  {
                "file":  "arch/x86/kernel/cpu/bugs.c"
            }
        }
    ]
}

Database specific

source 
"https://storage.googleapis.com/android-osv-test/ASB-A-169505929.json"