CVE-2022-29536: In GNOME Epiphany before 41.4 and 42.x before 42.2, an HTML document can trigger a client buffer overflow (in

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HIGH 7.5REMOTEWATCHLISTUPGRADEMITIGATEMITIGATE

CVE-2022-29536 is a high-severity flaw (CVSS 7.5) affecting epiphany, fedora, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In GNOME Epiphany before 41.4 and 42.x before 42.2, an HTML document can trigger a client buffer overflow (in ephy_string_shorten in the UI process) via a long page title. The issue occurs because the number of bytes for a UTF-8 ellipsis character is not properly considered.

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.0% (top 19%)
CISA exploited list	No
Weakness	CWE-787
Published	2022-04-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: debian · fedoraproject · gnome

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-04-20 23:15 UTCPublished CVE record published
2026-06-17 04:40 UTCUpdated Record last modified

gnome epiphany UPGRADE

Affected: < 41.4 · >= 42.0 and < 42.2

Fixed in: 41.4, 42.2

Safe to downgrade to: a release before 42.0

1. Check installed version

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

2. UPGRADE to 41.4 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade epiphany

Note

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

3. If no update is available yet, DOWNGRADE to a release before 42.0 (Debian / Ubuntu)

apt-cache madison epiphany sudo apt install epiphany=<VERSION_BEFORE_42.0> sudo apt-mark hold epiphany

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list epiphany sudo dnf downgrade epiphany-<VERSION_BEFORE_42.0> sudo dnf versionlock add epiphany

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.

fedoraproject fedora MITIGATE

Affected: 34 · 35 · 36

Fixed in: no fixed release known

Safe to downgrade to: a release before 34

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

debian debian linux MITIGATE

Affected: 10.0 · 11.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2022-29536?

epiphany: upgrade to 41.4, 42.2; fedora: mitigate or apply the listed mitigation; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-29536 being exploited?

CVE-2022-29536 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-2022-29536 affect?

CVE-2022-29536 affects epiphany, fedora, debian linux. Severity is high (CVSS 7.5). In GNOME Epiphany before 41.4 and 42.x before 42.2, an HTML document can trigger a client buffer overflow (in ephy_string_shorten in the UI process) via a long page title. The issue occurs because the number of bytes for a UTF-8 ellipsis ch

How urgent is CVE-2022-29536?

Priority 57/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Debian vulnerabilities

Related CVEs

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References

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