CVE-2025-8671

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Source

https://nvd.nist.gov/vuln/detail/CVE-2025-8671

Import Source

https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-8671.json

JSON Data

https://api.test.osv.dev/v1/vulns/CVE-2025-8671

Aliases

GHSA-mrjm-qq9m-9mjq

Downstream

UBUNTU-CVE-2025-8671

Published

2025-08-13T13:15:34Z

Modified

2025-08-18T14:02:01.427799Z

Summary

[none]

Details

A mismatch caused by client-triggered server-sent stream resets between HTTP/2 specifications and the internal architectures of some HTTP/2 implementations may result in excessive server resource consumption leading to denial-of-service (DoS). By opening streams and then rapidly triggering the server to reset them—using malformed frames or flow control errors—an attacker can exploit incorrect stream accounting. Streams reset by the server are considered closed at the protocol level, even though backend processing continues. This allows a client to cause the server to handle an unbounded number of concurrent streams on a single connection. This CVE will be updated as affected product details are released.

References

Affected packages

Alpine:v3.22 / varnish

Package

Name: varnish
Purl: pkg:apk/alpine/varnish?arch=source

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

7.7.2-r0

Affected versions

2.*

2.1.5-r0

3.*

3.0.0-r0

3.0.0-r1

3.0.0-r2

3.0.2-r0

3.0.2-r1

3.0.2-r2

3.0.2-r3

3.0.2-r4

3.0.2-r5

3.0.2-r6

3.0.2-r7

3.0.3-r0

3.0.3-r1

3.0.3-r2

3.0.4-r0

3.0.4-r1

3.0.4-r2

3.0.4-r3

3.0.4-r4

3.0.5-r0

3.0.5-r1

4.*

4.0.0-r0

4.0.0-r1

4.0.0-r2

4.0.1-r0

4.0.2-r0

4.0.2-r1

4.0.2-r2

4.0.3-r0

4.0.3-r1

4.1.0-r0

4.1.0-r1

4.1.0-r2

4.1.1-r0

4.1.2-r0

4.1.2-r1

4.1.2-r2

4.1.2-r3

4.1.3-r0

5.*

5.1.2-r0

5.1.2-r1

5.1.3-r0

5.2.0-r0

5.2.1-r0

6.*

6.0.0-r0

6.0.0-r1

6.0.1-r0

6.1.0-r0

6.1.1-r0

6.2.0-r0

6.2.0-r1

6.2.1-r0

6.3.0-r0

6.3.1-r0

6.3.1-r1

6.3.2-r0

6.4.0-r0

6.5.1-r0

6.6.0-r0

6.6.1-r0

6.6.1-r1

7.*

7.0.0-r0

7.0.1-r0

7.0.1-r1

7.0.2-r0

7.1.0-r0

7.1.1-r0

7.2.0-r0

7.2.1-r0

7.3.0-r0

7.3.0-r1

7.4.0-r0

7.4.1-r0

7.4.2-r0

7.5.0-r0

7.6.0-r0

7.6.1-r0

7.7.0-r0

7.7.1-r0

Debian:11 / h2o

Package

Name: h2o
Purl: pkg:deb/debian/h2o?arch=source

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.2.5+dfsg2-6

2.2.5+dfsg2-6.1

2.2.5+dfsg2-6.2

2.2.5+dfsg2-7

2.2.5+dfsg2-8

2.2.5+dfsg2-8.1~exp1

2.2.5+dfsg2-8.1

2.2.5+dfsg2-9

2.2.5+dfsg2-10

2.2.5+dfsg2-11

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:12 / h2o

Package

Name: h2o
Purl: pkg:deb/debian/h2o?arch=source

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.2.5+dfsg2-7

2.2.5+dfsg2-8

2.2.5+dfsg2-8.1~exp1

2.2.5+dfsg2-8.1

2.2.5+dfsg2-9

2.2.5+dfsg2-10

2.2.5+dfsg2-11

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:11 / varnish

Package

Name: varnish
Purl: pkg:deb/debian/varnish?arch=source

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

6.*

6.5.1-1

6.5.1-1+deb11u1

6.5.1-1+deb11u2

6.5.1-1+deb11u3

6.5.1-1+deb11u4

6.5.1-1+deb11u5

6.5.2-1

6.6.1-1

7.*

7.1.0-4

7.1.0-5

7.1.0-6

7.1.1-1

7.1.1-1.1

7.1.1-1.2

7.5.0-1

7.5.0-2

7.5.0-3

7.6.0-1

7.6.0-2

7.6.1-1

7.6.1-2

7.7.0-1

7.7.0-2

7.7.0-3

7.7.1-1

7.7.2-1

7.7.2-2

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:12 / varnish

Package

Name: varnish
Purl: pkg:deb/debian/varnish?arch=source

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

7.*

7.1.1-1.1

7.1.1-1.1+deb12u1

7.1.1-1.2

7.1.1-2+deb12u1

7.5.0-1

7.5.0-2

7.5.0-3

7.6.0-1

7.6.0-2

7.6.1-1

7.6.1-2

7.7.0-1

7.7.0-2

7.7.0-3

7.7.1-1

7.7.2-1

7.7.2-2

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:13 / varnish

Package

Name: varnish
Purl: pkg:deb/debian/varnish?arch=source

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

7.*

7.7.0-3

7.7.1-1

7.7.2-1

7.7.2-2

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:14 / varnish

Package

Name: varnish
Purl: pkg:deb/debian/varnish?arch=source

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

7.*

7.7.0-3

7.7.1-1

7.7.2-1

7.7.2-2

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Git / github.com/h2o/h2o

Affected ranges

Type: GIT
Repo: https://github.com/h2o/h2o
Events: Introduced

0 Unknown introduced commit / All previous commits are affected

Fixed

4729b661e3c6654198d2cc62997e1af58bef4b80

Affected versions

v0.*

v0.9.0

v0.9.1

v0.9.2

v1.*

v1.0.0

v1.0.1

v1.1.0

v1.1.1

v1.2.0

v1.3.0

v1.3.0-beta1

v1.3.1

v1.4.0

v1.4.1

v1.4.2

v1.5.0

v1.5.0-beta1

v1.5.0-beta2

v1.5.0-beta3

v1.5.0-beta4

v1.5.1

v1.5.2

v1.5.3

v1.6.0

v1.6.0-beta1

v1.6.0-beta2

v1.7.0

v1.7.0-beta1

v1.7.0-beta2

v1.7.0-beta3

v1.7.0-beta4

v1.7.0-beta5

v2.*

v2.1.0-beta1

v2.1.0-beta2

v2.1.0-beta3

v2.2.0

v2.2.0-beta1

v2.2.0-beta2

v2.2.0-beta3