CVE-2022-1011: A use-after-free flaw was found in the Linux kernel’s FUSE filesystem in the way a user triggers write()

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HIGH 7.8WATCHLISTUPGRADEMITIGATEDOWNGRADE

CVE-2022-1011 is a high-severity flaw (CVSS 7.8) affecting linux kernel, fedora, build of quarkus. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A use-after-free flaw was found in the Linux kernel’s FUSE filesystem in the way a user triggers write(). This flaw allows a local user to gain unauthorized access to data from the FUSE filesystem, resulting in privilege escalation.

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.2% (top 33%)
CISA exploited list	No
Weakness	CWE-416
Published	2022-03-18
Last modified	2026-08-26

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

Last updated 2026-08-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-03-18 18:15 UTCPublished CVE record published
2026-08-26 18:13 UTCUpdated Record last modified

linux linux kernel UPGRADE

Affected: >= 2.6.35 and < 4.9.320 · >= 4.10 and < 4.14.276 · >= 4.15 and < 4.19.238 · >= 4.20 and < 5.4.185 · >= 5.5 and < 5.10.106 · >= 5.11 and < 5.15.29 · >= 5.16 and < 5.16.15 · 5.17

Fixed in: 4.9.320, 4.14.276, 4.19.238, 5.4.185, 5.10.106, 5.15.29, 5.16.15

Safe to downgrade to: no unaffected older release

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.

fedoraproject fedora MITIGATE

Affected: 34 · 35

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.

redhat build of quarkus DOWNGRADE

Affected: 2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0

1. Check installed version

apt-cache policy build-of-quarkus || rpm -q build-of-quarkus || build-of-quarkus --version

2. No fixed release: DOWNGRADE to a release before 2.0 (Debian / Ubuntu)

apt-cache madison build-of-quarkus sudo apt install build-of-quarkus=<VERSION_BEFORE_2.0> sudo apt-mark hold build-of-quarkus

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

dnf --showduplicates list build-of-quarkus sudo dnf downgrade build-of-quarkus-<VERSION_BEFORE_2.0> sudo dnf versionlock add build-of-quarkus

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 developer tools DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy developer-tools || rpm -q developer-tools || developer-tools --version

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison developer-tools sudo apt install developer-tools=<VERSION_BEFORE_1.0> sudo apt-mark hold developer-tools

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

dnf --showduplicates list developer-tools sudo dnf downgrade developer-tools-<VERSION_BEFORE_1.0> sudo dnf versionlock add developer-tools

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 enterprise linux MITIGATE

Affected: 6.0 · 7.0 · 8.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.0

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.

redhat enterprise linux eus MITIGATE

Affected: 8.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.6

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-2022-1011?

linux kernel: upgrade to 4.9.320, 4.14.276, 4.19.238, 5.4.185, 5.10.106, 5.15.29, 5.16.15; fedora: mitigate or apply the listed mitigation; build of quarkus: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-1011 being exploited?

CVE-2022-1011 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-2022-1011 affect?

CVE-2022-1011 affects linux kernel, fedora, build of quarkus. Severity is high (CVSS 7.8). A use-after-free flaw was found in the Linux kernel’s FUSE filesystem in the way a user triggers write(). This flaw allows a local user to gain unauthorized access to data from the FUSE filesystem, resulting in privilege escalation.

How urgent is CVE-2022-1011?

Priority 49/100. High severity; On your watchlist

Software pages

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References

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