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Fencer Vulns
high 7.5

CVE-2024-32650 json

Rustls vulnerable to an infinite loop in rustls::conn::ConnectionCommon::complete_io() with proper client input

published 2024-04-19 2 y ago modified 2026-10-12 27 d ago also EUVD-2024-1125 , GHSA-6g7w-8wpp-frhj , RUSTSEC-2024-0336

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 61%
public exploits
0
none known

Summary

Rustls is a modern TLS library written in Rust. `rustls::ConnectionCommon::complete_io` could fall into an infinite loop based on network input. When using a blocking rustls server, if a client send a `close_notify` message immediately after `client_hello`, the server's `complete_io` will get in an infinite loop. This vulnerability is fixed in 0.23.5, 0.22.4, and 0.21.11.

Patch / fix

  • crates.io rustls 0.21.11, 0.22.4, 0.23.5
  • rustls_project rustls 0.21.11, 0.22.4, 0.23.5
  • rust-rustls Debian 14, Debian 13 0.21.12-1

debian advisories DEBIAN-CVE-2024-32650

  • sccache SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Development Tools 15 SP7 0.16.0~0-150600.10.11.1
  • gstreamer-plugins-rs SLE Module for Desktop Applications 15 SP7, SLE Module for Desktop Applications 15 SP6, openSUSE Leap 15.6 0.12.11-150600.3.3.1
  • rust-keylime SLE Micro 5.5 0.2.7+141-150500.3.5.1
  • rust-keylime SLE Micro 5.4 0.2.7+141-150400.3.5.1
  • rust-keylime SLE Micro 5.3 0.2.7+141-150400.3.7.1
  • rust-keylime Linux Micro 6.0 0.2.6+13-1.1

suse advisories SUSE-SU-2026:3022-1SUSE-SU-2025:03629-1SUSE-SU-2025:02811-1SUSE-SU-2025:02810-1SUSE-SU-2025:02809-1SUSE-SU-2025:20057-1

  • gitoxide openSUSE Leap 16.0 0.56.0-bp160.1.1
  • gitoxide openSUSE Tumbleweed 0.38.0-1.1
  • shadowsocks-rust openSUSE Tumbleweed 1.18.3-1.1
  • teleport openSUSE Tumbleweed 15.2.4-1.1
  • topgrade openSUSE Tumbleweed 14.0.1-2.1
  • kubetui openSUSE Tumbleweed 1.5.1-1.1
  • tlrc openSUSE Tumbleweed 1.9.2+0-1.1
  • sccache openSUSE Tumbleweed 0.8.0~3-1.1

opensuse advisories openSUSE-SU-2026:21558-1openSUSE-SU-2024:14424-1openSUSE-SU-2024:13893-1openSUSE-SU-2024:13903-1openSUSE-SU-2024:13904-1openSUSE-SU-2024:13912-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-32650 updated cvss 7.5

rust-rustls: Infinite loop in rustls::conn::ConnectionCommon::complete_io() with proper client input

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.95% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
crates.io rustls
>=0.23.0, <0.23.5
>=0.22.0, <0.22.4
>=0.21.0, <0.21.11
1 listed version
>=0.0.0-0, <0.21.11
0.23.5
0.22.4
0.21.11

Affected products

  • rustls rustls
  • rustls_project rustls

Classification

Weakness
  • CWE-835 Loop with Unreachable Exit Condition

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.