Kernel: use after free in vcs_read in drivers/tty/vt/vc_screen.c due to race
Published Jul 24, 2023
7.1
HIGHCVSS 3.1
EPSS 0.42%
Description
A use-after-free flaw was found in vcs_read in drivers/tty/vt/vc_screen.c in vc_screen in the Linux Kernel. This issue may allow an attacker with local user access to cause a system crash or leak internal kernel information.
Affected products
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||
|---|---|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 9 | affected |
|
Configuration 1
- < 6.2.0
- 6.2.0
- 6.2.0
- 6.2.0
- 6.2.0
- 6.2.0
- 6.2.0
Configuration 2
- 8.0
- 9.0
Configuration 3
- 14.04
- 16.04
- 18.04
- 20.04
- 22.04
No data.
Red Hat Enterprise Linux 8
kernel-0:4.18.0-553.el8_10
Fixed · RHSA-2024:3138
Red Hat Enterprise Linux 8
kernel-rt-0:4.18.0-553.rt7.342.el8_10
Fixed · RHSA-2024:2950
Red Hat Enterprise Linux 8.6 Extended Update Support
kernel-0:4.18.0-372.87.1.el8_6
Fixed · RHSA-2024:0412
Red Hat Enterprise Linux 8.8 Extended Update Support
kernel-0:4.18.0-477.43.1.el8_8
Fixed · RHSA-2024:0575
Red Hat Enterprise Linux 9
kernel-0:5.14.0-427.13.1.el9_4
Fixed · RHSA-2024:2394
Red Hat Enterprise Linux 9
kernel-0:5.14.0-427.13.1.el9_4
Fixed · RHSA-2024:2394
Red Hat Enterprise Linux 9.0 Extended Update Support
kernel-0:5.14.0-70.85.1.el9_0
Fixed · RHSA-2024:0432
Red Hat Enterprise Linux 9.0 Extended Update Support
kernel-rt-0:5.14.0-70.85.1.rt21.156.el9_0
Fixed · RHSA-2024:0431
Red Hat Enterprise Linux 9.2 Extended Update Support
kernel-0:5.14.0-284.48.1.el9_2
Fixed · RHSA-2024:0448
Red Hat Enterprise Linux 9.2 Extended Update Support
kernel-rt-0:5.14.0-284.48.1.rt14.333.el9_2
Fixed · RHSA-2024:0439
Red Hat Virtualization 4 for Red Hat Enterprise Linux 8
kernel-0:4.18.0-372.87.1.el8_6
Fixed · RHSA-2024:0412
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Out of support scope
Red Hat Enterprise Linux 7
kernel-rt
Out of support scope
Red Hat Enterprise Linux 9
kernel-rt
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 8 | kernel-0:4.18.0-553.el8_10 | Fixed | RHSA-2024:3138 |
| Red Hat Enterprise Linux 8 | kernel-rt-0:4.18.0-553.rt7.342.el8_10 | Fixed | RHSA-2024:2950 |
| Red Hat Enterprise Linux 8.6 Extended Update Support | kernel-0:4.18.0-372.87.1.el8_6 | Fixed | RHSA-2024:0412 |
| Red Hat Enterprise Linux 8.8 Extended Update Support | kernel-0:4.18.0-477.43.1.el8_8 | Fixed | RHSA-2024:0575 |
| Red Hat Enterprise Linux 9 | kernel-0:5.14.0-427.13.1.el9_4 | Fixed | RHSA-2024:2394 |
| Red Hat Enterprise Linux 9 | kernel-0:5.14.0-427.13.1.el9_4 | Fixed | RHSA-2024:2394 |
| Red Hat Enterprise Linux 9.0 Extended Update Support | kernel-0:5.14.0-70.85.1.el9_0 | Fixed | RHSA-2024:0432 |
| Red Hat Enterprise Linux 9.0 Extended Update Support | kernel-rt-0:5.14.0-70.85.1.rt21.156.el9_0 | Fixed | RHSA-2024:0431 |
| Red Hat Enterprise Linux 9.2 Extended Update Support | kernel-0:5.14.0-284.48.1.el9_2 | Fixed | RHSA-2024:0448 |
| Red Hat Enterprise Linux 9.2 Extended Update Support | kernel-rt-0:5.14.0-284.48.1.rt14.333.el9_2 | Fixed | RHSA-2024:0439 |
| Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | kernel-0:4.18.0-372.87.1.el8_6 | Fixed | RHSA-2024:0412 |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Out of support scope | n/a |
| Red Hat Enterprise Linux 9 | kernel-rt | Affected | n/a |
No package ranges for this CVE.
Remediation
Vendor solution
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.
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:N/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
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
2023–2026- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (7 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.42% (0.00419) | 33.89th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.45% (0.00446) | 35.28th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.04% (0.00036) | 7.12th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00042) | 5.07th | v3 (v2023.03.01) |
| May 23, 2024 | 0.04% (0.00044) | 9.76th | v3 (v2023.03.01) |
| Aug 2, 2023 | 0.04% (0.00042) | 5.71th | v3 (v2023.03.01) |
| Jul 25, 2023 | 0.05% (0.00050) | 17.01th | v3 (v2023.03.01) |
References (16)
- http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.html
- http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html
- https://access.redhat.com/errata/RHSA-2024:0412 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2024:0431 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2024:0432 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2024:0439 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2024:0448 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2024:0575 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2024:2394 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2024:2950 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2024:3138 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2023-3567 vdb-entryx_refsource_REDHATThird Party AdvisoryVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2221463 issue-trackingx_refsource_REDHATIssue TrackingThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2023-3567
- https://www.cve.org/CVERecord?id=CVE-2023-3567
- https://www.spinics.net/lists/stable-commits/msg285184.html Mailing ListPatch
Change history (0)
No recorded changes yet.