CVE-2025-13836

Publication date 1 December 2025

Last updated 12 January 2026

Ubuntu priority

Medium

Why this priority?

Description

When reading an HTTP response from a server, if no read amount is specified, the default behavior will be to use Content-Length. This allows a malicious server to cause the client to read large amounts of data into memory, potentially causing OOM or other DoS.

Status

Package Ubuntu Release Status
python3.8 25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
20.04 LTS focal
Fixed 3.8.10-0ubuntu1~20.04.18+esm4
18.04 LTS bionic
Fixed 3.8.0-3ubuntu1~18.04.2+esm8
python2.7 25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected
python3.4 25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
14.04 LTS trusty
Not affected
python3.5 25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected
python3.6 25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
18.04 LTS bionic
Not affected
python3.7 25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
18.04 LTS bionic
Not affected
python3.9 25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
20.04 LTS focal
Fixed 3.9.5-3ubuntu0~20.04.1+esm8
python3.10 25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy
Fixed 3.10.12-1~22.04.13
python3.11 25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy
Fixed 3.11.0~rc1-1~22.04.1~esm7
python3.12 25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble
Fixed 3.12.3-1ubuntu0.10
22.04 LTS jammy Not in release
python3.13 25.10 questing
Fixed 3.13.7-1ubuntu0.2
25.04 plucky
Fixed 3.13.3-1ubuntu0.5
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
python3.14 25.10 questing
Fixed 3.14.0-1ubuntu0.1
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release

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References

Related Ubuntu Security Notices (USN)

Other references