kernel: possible use-after-free due to improper locking in rcu_cblist_dequeue of rcu_segcblist.c
Published Jun 15, 2022
6.7
MEDIUMCVSS 3.1
EPSS 0.13%
Description
In rcu_cblist_dequeue of rcu_segcblist.c, there is a possible use-after-free due to improper locking. This could lead to local escalation of privilege in the kernel with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-222091980References: Upstream kernel
Affected products
- Vendor n/a Product Android Defaultn/a
- Version Android kernelStatusaffectedConstraints-
- 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 | Android | n/a |
|
No data.
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-rt
Not affected
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise Linux 8
kernel-rt
Not affected
Red Hat Enterprise Linux 9
kernel
Affected
Red Hat Enterprise Linux 9
kernel-rt
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel | Affected | n/a |
| Red Hat Enterprise Linux 9 | kernel-rt | Affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
At this time, no Red Hat Enterprise Linux products ship with support for this feature. There is an outstanding feature request for io_uring to be included with Red Hat Enterprise Linux 9.
Red Hat mitigation
Mitigation for this issue is either not available or the currently available options does not 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:H/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:C/I:C/A:C
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 3, 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 (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.13% (0.00125) | 1.91th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.12% (0.00122) | 2.27th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.03% (0.00027) | 4.54th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00042) | 5.07th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.04% (0.01036) | 43.31th | v2 (v2022.01.01) |
| Dec 21, 2022 | 1.04% (0.01036) | 42.32th | v2 (v2022.01.01) |
| Jun 24, 2022 | 1.04% (0.01036) | 40.28th | v2 (v2022.01.01) |
| Jun 16, 2022 | 2.56% (0.02559) | 80.63th | v2 (v2022.01.01) |
References (6)
- https://access.redhat.com/security/cve/CVE-2022-20153 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2150845 Issue Tracking
- https://github.com/torvalds/linux/commit/f70865db5ff35f5ed0c7e9ef63e7cca3d4947f04
- https://nvd.nist.gov/vuln/detail/CVE-2022-20153
- https://source.android.com/security/bulletin/pixel/2022-06-01 x_refsource_MISCVendor Advisory
- https://www.cve.org/CVERecord?id=CVE-2022-20153
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2022-20153 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2150845 | Issue Tracking | |
| https://github.com/torvalds/linux/commit/f70865db5ff35f5ed0c7e9ef63e7cca3d4947f04 | ||
| https://nvd.nist.gov/vuln/detail/CVE-2022-20153 | ||
| https://source.android.com/security/bulletin/pixel/2022-06-01 | x_refsource_MISCVendor Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2022-20153 |
Change history (0)
No recorded changes yet.