kernel: FUSE allows UAF reads of write() buffers, allowing theft of (partial) /etc/shadow hashes
Published Mar 18, 2022
7.8
HIGHCVSS 3.1
EPSS 1.17%
Description
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.
Affected products
- Vendor n/a Product Kernel Defaultn/a
- Version Linux kernel 5.16-rc8StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Kernel | n/a |
|
Configuration 1
- ≥ 2.6.35 · < 4.9.320
- ≥ 4.10 · < 4.14.276
- ≥ 4.15 · < 4.19.238
- ≥ 4.20 · < 5.4.185
- ≥ 5.5 · < 5.10.106
- ≥ 5.11 · < 5.15.29
- ≥ 5.16 · < 5.16.15
- 5.17
- 5.17
- 5.17
- 5.17
- 5.17
- 5.17
- 5.17
- 5.17
Configuration 2
- 34
- 35
Configuration 3
- 2.0
- 1.0
- 6.0
- 7.0
- 8.0
- 8.6
- 8.0
- 8.6
- 8.0
- 8.6
- 8
- 8
- 8.6
- 8.6
- 8.6
- 8.6
- 8.6
- 8.6
Configuration 4
- 4.0
Running on/with
- 8.0
Configuration 5
- n/a
Running on/with
- 8.0
- 8.6
- 8.6
- 8.0
- 8.6
Configuration 6
- n/a
Configuration 7
- n/a
Configuration 8
- n/a
Configuration 9
- n/a
Configuration 10
- n/a
Configuration 11
- n/a
Configuration 12
- n/a
Configuration 13
- n/a
Configuration 14
- 9.0
- 10.0
Configuration 15
- 22.1.3
No data.
Red Hat Enterprise Linux 7 Extended Lifecycle Support
kernel-0:3.10.0-1160.123.1.el7
Fixed · RHSA-2024:5259
Red Hat Enterprise Linux 8
kernel-0:4.18.0-372.9.1.el8
Fixed · RHSA-2022:1988
Red Hat Enterprise Linux 8
kernel-rt-0:4.18.0-372.9.1.rt7.166.el8
Fixed · RHSA-2022:1975
Red Hat Enterprise Linux 6
kernel
Out of support scope
Red Hat Enterprise Linux 7
kernel-rt
Affected
Red Hat Enterprise Linux 9
kernel
Not affected
Red Hat Enterprise Linux 9
kernel-rt
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 Extended Lifecycle Support | kernel-0:3.10.0-1160.123.1.el7 | Fixed | RHSA-2024:5259 |
| Red Hat Enterprise Linux 8 | kernel-0:4.18.0-372.9.1.el8 | Fixed | RHSA-2022:1988 |
| Red Hat Enterprise Linux 8 | kernel-rt-0:4.18.0-372.9.1.rt7.166.el8 | Fixed | RHSA-2022:1975 |
| Red Hat Enterprise Linux 6 | kernel | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Affected | n/a |
| Red Hat Enterprise Linux 9 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel-rt | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
For the Red Hat Enterprise Linux the issue actual if fuse or fuse3 package is installed on the system and only privileged user can install it.
Red Hat mitigation
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
AV:L/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.17% (0.01169) | 66.22th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.18% (0.01179) | 63.48th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.11% (0.00108) | 26.57th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00043) | 11.61th | v3 (v2023.03.01) |
| Jun 20, 2024 | 0.04% (0.00043) | 9.81th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00043) | 7.80th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00950) | 32.28th | v2 (v2022.01.01) |
| Feb 13, 2023 | 0.95% (0.00950) | 31.86th | v2 (v2022.01.01) |
| Jul 5, 2022 | 0.95% (0.00950) | 29.81th | v2 (v2022.01.01) |
| Jul 2, 2022 | 0.89% (0.00890) | 27.83th | v2 (v2022.01.01) |
| Apr 30, 2022 | 0.89% (0.00885) | 24.58th | v2 (v2022.01.01) |
| Apr 20, 2022 | 0.95% (0.00950) | 28.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00890) | 26.62th | v2 (v2022.01.01) |
| Mar 19, 2022 | 0.89% (0.00890) | 13.07th | v2 (v2022.01.01) |
References (9)
- https://access.redhat.com/security/cve/CVE-2022-1011 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2064855 Issue TrackingThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse.git/commit/?h=for-next Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2022/07/msg00000.html mailing-listMailing ListThird Party Advisory
- https://lore.kernel.org/lkml/20220414110839.241541230@linuxfoundation.org/
- https://nvd.nist.gov/vuln/detail/CVE-2022-1011
- https://www.cve.org/CVERecord?id=CVE-2022-1011
- https://www.debian.org/security/2022/dsa-5173 vendor-advisoryThird Party Advisory
- https://www.oracle.com/security-alerts/cpujul2022.html Third Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2022-1011 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2064855 | Issue TrackingThird Party Advisory | |
| https://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse.git/commit/?h=for-next | Vendor Advisory | |
| https://lists.debian.org/debian-lts-announce/2022/07/msg00000.html | mailing-listMailing ListThird Party Advisory | |
| https://lore.kernel.org/lkml/20220414110839.241541230@linuxfoundation.org/ | ||
| https://nvd.nist.gov/vuln/detail/CVE-2022-1011 | ||
| https://www.cve.org/CVERecord?id=CVE-2022-1011 | ||
| https://www.debian.org/security/2022/dsa-5173 | vendor-advisoryThird Party Advisory | |
| https://www.oracle.com/security-alerts/cpujul2022.html | Third Party Advisory |
Change history (0)
No recorded changes yet.