CVE-2022-41723 | Denial of service via crafted HTTP/2 stream in net/http and golang.org/x/net

A maliciously crafted HTTP/2 stream could cause excessive CPU consumption in the HPACK decoder, sufficient to cause a denial of service from a small number of small requests.

Published: 2023-02-28 Last update: 2025-05-05 Assigner: [email protected] Source: [email protected]

Conclusion & alert: CVE-2022-41723 is rated Moderate Risk (47.5/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.26%). Mandatory action: Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2022-41723

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-07 0.23% 0.26% +0.04%
2 2026-05-10 0.27% 0.23% -0.05%
3 2026-03-18 0.27%

Full EPSS history (24 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-41723

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
3.9 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
3.9 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2022-41723

GitHub Security Advisory for CVE-2022-41723

GHSA-vvpx-j8f3-3w6h · Severity: high · Ecosystem: go — golang.org/x/net vulnerable to Uncontrolled Resource Consumption

OS Trackers for CVE-2022-41723

vendor priority summary link
alpine CVE-2022-41723: 2 source package rows (go, podman); 73 state rows across 7 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 13, open 60. https://security.alpinelinux.org/vuln/CVE-2022-41723
debian not yet assigned CVE-2022-41723 not yet assigned priority: Debian including 3 source packages (golang-1.15, golang-1.19, golang-golang-x-net), 7 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5, open 2. https://security-tracker.debian.org/tracker/CVE-2022-41723
gentoo high CVE-2022-41723: 1 GLSA(s) (202311-09), 1 atom(s) (dev-lang/go); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2022-41723
redhat medium https://access.redhat.com/security/cve/CVE-2022-41723
suse high CVE-2022-41723 severity important: SUSE including 209 source package names (1.18-20.6:go1.18-1.18.10-150000.1.46.1, 1.20-2.2:go1.20-1.20.2-150000.1.5.1, …), 597 product×package rows across 103 product lines (Container bci/golang, Container containers/milvus, … (103 product lines)): Fixed 462, Known Not Affected 130, Will Not Fix 5. https://www.suse.com/security/cve/CVE-2022-41723/
ubuntu medium CVE-2022-41723 medium priority: Ubuntu including 20 source packages (adsys, containerd, …), 219 status rows across 13 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 125, not-affected 33, released 25, needs-triage 15, needed 13, ignored 8. https://ubuntu.com/security/CVE-2022-41723

Affected software / configurations for CVE-2022-41723

Vendor Product Version Raw CPE
golang go < 1.19.6 cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*
golang go 1.20.0 cpe:2.3:a:golang:go:1.20.0:-:*:*:*:*:*:*
golang hpack < 0.7.0 cpe:2.3:a:golang:hpack:*:*:*:*:*:go:*:*
golang http2 < 0.7.0 cpe:2.3:a:golang:http2:*:*:*:*:*:go:*:*

References for CVE-2022-41723

URL Tags
https://go.dev/cl/468135 Patch
https://go.dev/cl/468295 Patch
https://go.dev/issue/57855 Issue Tracking
https://groups.google.com/g/golang-announce/c/V0aBFqaFs_E Mailing List Vendor Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/4BUK2ZIAGCULOOYDNH25JPU6JBES5NF2/
https://lists.fedoraproject.org/archives/list/[email protected]/message/4MA5XS5DAOJ5PKKNG5TUXKPQOFHT5VBC/ Third Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/REMHVVIBDNKSRKNOTV7EQSB7CYQWOUOU/
https://lists.fedoraproject.org/archives/list/[email protected]/message/RGW7GE2Z32ZT47UFAQFDRQE33B7Q7LMT/ Third Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/RLBQ3A7ROLEQXQLXFDLNJ7MYPKG5GULE/ Third Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/T7N5GV4CHH6WAGX3GFMDD3COEOVCZ4RI/
https://lists.fedoraproject.org/archives/list/[email protected]/message/XX3IMUTZKRQ73PBZM4E2JP4BKYH4C6XE/ Third Party Advisory
https://pkg.go.dev/vuln/GO-2023-1571 Vendor Advisory
https://security.gentoo.org/glsa/202311-09
https://www.couchbase.com/alerts/
https://security.netapp.com/advisory/ntap-20230331-0010/
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