CVE-2023-39322: Memory exhaustion in QUIC connection handling in crypto/tls
Vulnerability summary
CVE-2023-39322 is a high (CVSS 7.5) vulnerability in go standard library crypto/tls. EPSS estimates a 1.34% chance of exploitation in the next 30 days, higher than 71.4% of scored vulnerabilities.
Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 19 · Related 5Timeline
- 08-09-2023PublishedVulnerability first disclosed.
- 13-02-2025Last modifiedVulnerability information updated.
Description
QUIC connections do not set an upper bound on the amount of data buffered when reading post-handshake messages, allowing a malicious QUIC connection to cause unbounded memory growth. With fix, connections now consistently reject messages larger than 65KiB in size.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
1.34%
Chance of exploitation in the next 30 days
Percentile
71%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.34% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Alpine1 product
- go≥ 1.21.0, < 1.20.8-r0 | ≥ 1.21.0, < 1.21.1-r0
Chainguard1 product
- metrics-server< 0.6.4-r1
Go1 product
- stdlib≥ 1.21.0-0, < 1.21.1
Go standard library1 product
- crypto/tls≥ 1.21.0-0, < 1.21.1
Golang1 product
- go≥ 1.21.0, < 1.21.1
Ubuntu1 product
- golang-1.21< 1.21.1-1~ubuntu20.04.1 | < 1.21.1-1~ubuntu22.04.1 | < 1.21.5-1
Wolfi1 product
- metrics-server< 0.6.4-r1
7 vendors · 7 products
References
11 links- security.netapp.com/advisory/ntap-20231020-0004/Third Party Advisory