CVE-2023-3161

A flaw was found in the Framebuffer Console (fbcon) in the Linux Kernel. When providing font->width and font->height greater than 32 to fbcon_set_font, since there are no checks in place, a shift-out-of-bounds occurs leading to undefined behavior and possible denial of service.

Database specific

{
    "cna_assigner":  "redhat",
    "cwe_ids":  [
        "CWE-1335"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/3xxx/CVE-2023-3161.json"
}

References

Affected packages

Git / github.com/torvalds/linux

Affected ranges

Type

GIT

Repo

https://github.com/torvalds/linux

Events

Introduced

4ec5183ec48656cec489c49f989c508b68b518e3

Fixed

2b09d5d364986f724f17001ccfe4126b9b43a0be

Database specific

Show details

{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "Fixed in kernel 6.2-rc7"
                },
                {
                    "last_affected":  "Fixed in kernel 6.2-rc7"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "fixed":  "2b09d5d364986f724f17001ccfe4126b9b43a0be"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

Fixed in kernel 6.*

Fixed in kernel 6.2-rc7

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-3161.json"

vanir_signatures

[
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "124272392246698317783120795423436082887",
                "134229066719175183791918770676303388442",
                "98584942807167272420032876425097977336",
                "175451742690777329622590600195811777574",
                "93305016619378937922988930595095334458"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2023-3161-797a504b",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/torvalds/linux/commit/2b09d5d364986f724f17001ccfe4126b9b43a0be",
        "target":  {
            "file":  "drivers/video/fbdev/core/fbcon.c"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "314148282270194586891737488428413291590",
            "length":  1801
        },
        "id":  "CVE-2023-3161-b289097c",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/torvalds/linux/commit/2b09d5d364986f724f17001ccfe4126b9b43a0be",
        "target":  {
            "file":  "drivers/video/fbdev/core/fbcon.c",
            "function":  "fbcon_set_font"
        }
    }
]

vanir_signatures_modified

"2026-10-16T08:44:00Z"