CVE-2025-2784: A flaw was found in libsoup

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HIGH 7.0REMOTEWATCHLISTUPGRADEDOWNGRADEDOWNGRADE

CVE-2025-2784 is a high-severity flaw (CVSS 7.0) affecting libsoup, codeready linux builder, codeready linux builder for arm64. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw was found in libsoup. The package is vulnerable to a heap buffer over-read when sniffing content via the skip_insight_whitespace() function. Libsoup clients may read one byte out-of-bounds in response to a crafted HTTP response by an HTTP server.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.0 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 41%)
CISA exploited list	No
Weakness	CWE-125
Published	2025-04-03
Last modified	2026-11-01

Publisher (CNA): Red Hat, Inc. · Vendor: gnome · redhat

Last updated 2026-11-01 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-04-03 03:15 UTCPublished CVE record published
2026-11-01 01:17 UTCUpdated Record last modified

gnome libsoup UPGRADE

Affected: < 3.6.5

Fixed in: 3.6.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy libsoup || rpm -q libsoup || libsoup --version

2. UPGRADE to 3.6.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade libsoup

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade libsoup

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

redhat codeready linux builder DOWNGRADE

Affected: 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0

1. Check installed version

apt-cache policy codeready-linux-builder || rpm -q codeready-linux-builder || codeready-linux-builder --version

2. No fixed release: DOWNGRADE to a release before 10.0 (Debian / Ubuntu)

apt-cache madison codeready-linux-builder sudo apt install codeready-linux-builder=<VERSION_BEFORE_10.0> sudo apt-mark hold codeready-linux-builder

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list codeready-linux-builder sudo dnf downgrade codeready-linux-builder-<VERSION_BEFORE_10.0> sudo dnf versionlock add codeready-linux-builder

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

redhat codeready linux builder for arm64 DOWNGRADE

Affected: 10.0_aarch64

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0_aarch64

1. Check installed version

apt-cache policy codeready-linux-builder-for-arm64 || rpm -q codeready-linux-builder-for-arm64 || codeready-linux-builder-for-arm64 --version

2. No fixed release: DOWNGRADE to a release before 10.0_aarch64 (Debian / Ubuntu)

apt-cache madison codeready-linux-builder-for-arm64 sudo apt install codeready-linux-builder-for-arm64=<VERSION_BEFORE_10.0_aarch64> sudo apt-mark hold codeready-linux-builder-for-arm64

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list codeready-linux-builder-for-arm64 sudo dnf downgrade codeready-linux-builder-for-arm64-<VERSION_BEFORE_10.0_aarch64> sudo dnf versionlock add codeready-linux-builder-for-arm64

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

redhat codeready linux builder for arm64 eus DOWNGRADE

Affected: 10.0_aarch64

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0_aarch64

1. Check installed version

apt-cache policy codeready-linux-builder-for-arm64-eus || rpm -q codeready-linux-builder-for-arm64-eus || codeready-linux-builder-for-arm64-eus --version

2. No fixed release: DOWNGRADE to a release before 10.0_aarch64 (Debian / Ubuntu)

apt-cache madison codeready-linux-builder-for-arm64-eus sudo apt install codeready-linux-builder-for-arm64-eus=<VERSION_BEFORE_10.0_aarch64> sudo apt-mark hold codeready-linux-builder-for-arm64-eus

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list codeready-linux-builder-for-arm64-eus sudo dnf downgrade codeready-linux-builder-for-arm64-eus-<VERSION_BEFORE_10.0_aarch64> sudo dnf versionlock add codeready-linux-builder-for-arm64-eus

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

redhat codeready linux builder for ibm z systems DOWNGRADE

Affected: 10.0_s390x

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0_s390x

1. Check installed version

apt-cache policy codeready-linux-builder-for-ibm-z-systems || rpm -q codeready-linux-builder-for-ibm-z-systems || codeready-linux-builder-for-ibm-z-systems --version

2. No fixed release: DOWNGRADE to a release before 10.0_s390x (Debian / Ubuntu)

apt-cache madison codeready-linux-builder-for-ibm-z-systems sudo apt install codeready-linux-builder-for-ibm-z-systems=<VERSION_BEFORE_10.0_s390x> sudo apt-mark hold codeready-linux-builder-for-ibm-z-systems

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list codeready-linux-builder-for-ibm-z-systems sudo dnf downgrade codeready-linux-builder-for-ibm-z-systems-<VERSION_BEFORE_10.0_s390x> sudo dnf versionlock add codeready-linux-builder-for-ibm-z-systems

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

redhat codeready linux builder for ibm z systems eus DOWNGRADE

Affected: 10.0_s390x

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0_s390x

1. Check installed version

apt-cache policy codeready-linux-builder-for-ibm-z-systems-eus || rpm -q codeready-linux-builder-for-ibm-z-systems-eus || codeready-linux-builder-for-ibm-z-systems-eus --version

2. No fixed release: DOWNGRADE to a release before 10.0_s390x (Debian / Ubuntu)

apt-cache madison codeready-linux-builder-for-ibm-z-systems-eus sudo apt install codeready-linux-builder-for-ibm-z-systems-eus=<VERSION_BEFORE_10.0_s390x> sudo apt-mark hold codeready-linux-builder-for-ibm-z-systems-eus

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list codeready-linux-builder-for-ibm-z-systems-eus sudo dnf downgrade codeready-linux-builder-for-ibm-z-systems-eus-<VERSION_BEFORE_10.0_s390x> sudo dnf versionlock add codeready-linux-builder-for-ibm-z-systems-eus

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-2784?

libsoup: upgrade to 3.6.5; codeready linux builder: downgrade or apply the listed mitigation; codeready linux builder for arm64: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-2784 being exploited?

CVE-2025-2784 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-2784 affect?

CVE-2025-2784 affects libsoup, codeready linux builder, codeready linux builder for arm64. Severity is high (CVSS 7.0). A flaw was found in libsoup. The package is vulnerable to a heap buffer over-read when sniffing content via the skip_insight_whitespace() function. Libsoup clients may read one byte out-of-bounds in response to a crafted HTTP response by an

How urgent is CVE-2025-2784?

Priority 54/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

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References

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