UBUNTU-CVE-2024-12254

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Source
https://ubuntu.com/security/CVE-2024-12254
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-12254.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2024-12254
Upstream
Downstream
Related
Published
2024-12-06T16:15:00Z
Modified
2025-07-18T16:56:21Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Starting in Python 3.12.0, the asyncio._SelectorSocketTransport.writelines() method would not "pause" writing and signal to the Protocol to drain the buffer to the wire once the write buffer reached the "high-water mark". Because of this, Protocols would not periodically drain the write buffer potentially leading to memory exhaustion. This vulnerability likely impacts a small number of users, you must be using Python 3.12.0 or later, on macOS or Linux, using the asyncio module with protocols, and using .writelines() method which had new zero-copy-on-write behavior in Python 3.12.0 and later. If not all of these factors are true then your usage of Python is unaffected.

References

Affected packages

Ubuntu:24.04:LTS / python3.12

Package

Name
python3.12
Purl
pkg:deb/ubuntu/python3.12@3.12.3-1ubuntu0.4?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.12.3-1ubuntu0.4

Affected versions

3.*

3.12.0-1
3.12.0-5
3.12.0-6
3.12.0-7
3.12.1-2
3.12.2-1
3.12.2-4build3
3.12.2-4build4
3.12.2-5ubuntu3
3.12.3-1
3.12.3-1ubuntu0.1
3.12.3-1ubuntu0.2
3.12.3-1ubuntu0.3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "idle-python3.12",
            "binary_version": "3.12.3-1ubuntu0.4"
        },
        {
            "binary_name": "libpython3.12-dev",
            "binary_version": "3.12.3-1ubuntu0.4"
        },
        {
            "binary_name": "libpython3.12-minimal",
            "binary_version": "3.12.3-1ubuntu0.4"
        },
        {
            "binary_name": "libpython3.12-stdlib",
            "binary_version": "3.12.3-1ubuntu0.4"
        },
        {
            "binary_name": "libpython3.12-testsuite",
            "binary_version": "3.12.3-1ubuntu0.4"
        },
        {
            "binary_name": "libpython3.12t64",
            "binary_version": "3.12.3-1ubuntu0.4"
        },
        {
            "binary_name": "libpython3.12t64-dbg",
            "binary_version": "3.12.3-1ubuntu0.4"
        },
        {
            "binary_name": "python3.12",
            "binary_version": "3.12.3-1ubuntu0.4"
        },
        {
            "binary_name": "python3.12-dbg",
            "binary_version": "3.12.3-1ubuntu0.4"
        },
        {
            "binary_name": "python3.12-dev",
            "binary_version": "3.12.3-1ubuntu0.4"
        },
        {
            "binary_name": "python3.12-doc",
            "binary_version": "3.12.3-1ubuntu0.4"
        },
        {
            "binary_name": "python3.12-examples",
            "binary_version": "3.12.3-1ubuntu0.4"
        },
        {
            "binary_name": "python3.12-full",
            "binary_version": "3.12.3-1ubuntu0.4"
        },
        {
            "binary_name": "python3.12-minimal",
            "binary_version": "3.12.3-1ubuntu0.4"
        },
        {
            "binary_name": "python3.12-nopie",
            "binary_version": "3.12.3-1ubuntu0.4"
        },
        {
            "binary_name": "python3.12-venv",
            "binary_version": "3.12.3-1ubuntu0.4"
        }
    ],
    "availability": "No subscription required"
}