Kernel: use after free in vcs_read in drivers/tty/vt/vc_screen.c due to race
Priority LOW 32CWE-416Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · High
- Fix status
- Partial Red Hat: 24 fixed, 2 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
EPSS 0.00419 36th percentileScored 2026-11-07
Fix Partial Red Hat: 9 advisoriesRed Hat: 24 fixed, 2 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 8 | — | 4.18.0-553.rt7.342.el8_10 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | 4.18.0-553.el8_10 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support | — | 4.18.0-372.87.1.el8_6 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.8 Extended Update Support | — | 4.18.0-477.43.1.el8_8 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 5.14.0-427.13.1.el9_4 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 5.14.0-427.13.1.el9_4 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.0 Extended Update Support | — | 5.14.0-70.85.1.el9_0 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.0 Extended Update Support | — | 5.14.0-70.85.1.rt21.156.el9_0 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.2 Extended Update Support | — | 5.14.0-284.48.1.el9_2 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.2 Extended Update Support | — | 5.14.0-284.48.1.rt14.333.el9_2 | Patch available | CNA |
| Red Hat | Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | — | 4.18.0-372.87.1.el8_6 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 6 | — | — | Not affected | CNA |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | No fix listed | CNA |
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 4.18.0-553.rt7.342.el8_10 Patch available CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 4.18.0-553.el8_10 Patch available CNA
- Red Hat Enterprise Linux 8.6 Extended Update Support VendorRed Hat Affected — Fixed in 4.18.0-372.87.1.el8_6 Patch available CNA
- Red Hat Enterprise Linux 8.8 Extended Update Support VendorRed Hat Affected — Fixed in 4.18.0-477.43.1.el8_8 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 5.14.0-427.13.1.el9_4 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 5.14.0-427.13.1.el9_4 Patch available CNA
- Red Hat Enterprise Linux 9.0 Extended Update Support VendorRed Hat Affected — Fixed in 5.14.0-70.85.1.el9_0 Patch available CNA
- Red Hat Enterprise Linux 9.0 Extended Update Support VendorRed Hat Affected — Fixed in 5.14.0-70.85.1.rt21.156.el9_0 Patch available CNA
- Red Hat Enterprise Linux 9.2 Extended Update Support VendorRed Hat Affected — Fixed in 5.14.0-284.48.1.el9_2 Patch available CNA
- Red Hat Enterprise Linux 9.2 Extended Update Support VendorRed Hat Affected — Fixed in 5.14.0-284.48.1.rt14.333.el9_2 Patch available CNA
- Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 4.18.0-372.87.1.el8_6 Patch available CNA
- Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in — No fix listed CNA
CPE configurations NVD · 14
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | before 6.2.0 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.2.0:rc1:*:*:*:*:*:* | 6.2.0 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.2.0:rc2:*:*:*:*:*:* | 6.2.0 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.2.0:rc3:*:*:*:*:*:* | 6.2.0 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.2.0:rc4:*:*:*:*:*:* | 6.2.0 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.2.0:rc5:*:*:*:*:*:* | 6.2.0 rc5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.2.0:rc6:*:*:*:*:*:* | 6.2.0 rc6 | Vulnerable | Linux |
| cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Red Hat |
| cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* | 14.04 | Vulnerable | Canonical |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 6.2.0 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.2.0:rc1:*:*:*:*:*:* Versions 6.2.0 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.2.0:rc2:*:*:*:*:*:* Versions 6.2.0 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.2.0:rc3:*:*:*:*:*:* Versions 6.2.0 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.2.0:rc4:*:*:*:*:*:* Versions 6.2.0 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.2.0:rc5:*:*:*:*:*:* Versions 6.2.0 rc5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.2.0:rc6:*:*:*:*:*:* Versions 6.2.0 rc6 Vulnerable ·Linux
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Red Hat
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* Versions 14.04 Vulnerable ·Canonical
Show 4 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* | 16.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* | 18.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* | 20.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:22.04:*:*:*:lts:*:*:* | 22.04 | Vulnerable | Canonical |
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* Versions 16.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* Versions 20.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:22.04:*:*:*:lts:*:*:* Versions 22.04 Vulnerable ·Canonical
Remediation
Red Hat 9 advisories
- RHSA-2024:2950 Released 2024-05-22 · Red Hat rating Moderatekernel-rt security and bug fix update
- Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.rt7.342.el8_10, kernel-rt-core-4.18.0-553.rt7.342.el8_10, kernel-rt-debug-4.18.0-553.rt7.342.el8_10 +9
- Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.rt7.342.el8_10, kernel-rt-core-4.18.0-553.rt7.342.el8_10, kernel-rt-debug-4.18.0-553.rt7.342.el8_10 +7
- RHSA-2024:3138 Released 2024-05-22 · Red Hat rating Moderatekernel security, bug fix, and enhancement update
- Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.el8_10, kernel-4.18.0-553.el8_10, kernel-abi-stablelists-4.18.0-553.el8_10 +19
- Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.el8_10
- RHSA-2024:2394 Released 2024-04-30 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-427.13.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.13.1.el9_4, kernel-64k-devel-5.14.0-427.13.1.el9_4 +11
- Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.3.0-427.13.1.el9_4, kernel-5.14.0-427.13.1.el9_4, kernel-64k-5.14.0-427.13.1.el9_4 +29
- Red Hat Enterprise Linux CRB (v. 9) kernel-tools-libs-devel-5.14.0-427.13.1.el9_4, libperf-5.14.0-427.13.1.el9_4
- Red Hat Enterprise Linux NFV (v. 9) kernel-rt-5.14.0-427.13.1.el9_4, kernel-rt-core-5.14.0-427.13.1.el9_4, kernel-rt-debug-5.14.0-427.13.1.el9_4 +11
- Red Hat Enterprise Linux RT (v. 9) kernel-rt-5.14.0-427.13.1.el9_4, kernel-rt-core-5.14.0-427.13.1.el9_4, kernel-rt-debug-5.14.0-427.13.1.el9_4 +9
Show 6 more Red Hat advisories
- RHSA-2024:0575 Released 2024-01-30 · Red Hat rating Importantkernel security and bug fix update
- Red Hat CodeReady Linux Builder EUS (v.8.8) kernel-tools-libs-devel-4.18.0-477.43.1.el8_8
- Red Hat Enterprise Linux BaseOS EUS (v.8.8) bpftool-4.18.0-477.43.1.el8_8, kernel-4.18.0-477.43.1.el8_8, kernel-abi-stablelists-4.18.0-477.43.1.el8_8 +19
- RHSA-2024:0432 Released 2024-01-25 · Red Hat rating Importantkernel security and bug fix update
- Red Hat CodeReady Linux Builder EUS (v.9.0) kernel-tools-libs-devel-5.14.0-70.85.1.el9_0
- Red Hat Enterprise Linux AppStream EUS (v.9.0) kernel-debug-devel-5.14.0-70.85.1.el9_0, kernel-debug-devel-matched-5.14.0-70.85.1.el9_0, kernel-devel-5.14.0-70.85.1.el9_0 +5
- Red Hat Enterprise Linux BaseOS EUS (v.9.0) bpftool-5.14.0-70.85.1.el9_0, kernel-5.14.0-70.85.1.el9_0, kernel-abi-stablelists-5.14.0-70.85.1.el9_0 +14
- RHSA-2024:0431 Released 2024-01-25 · Red Hat rating Importantkernel-rt security and bug fix update
- Red Hat Enterprise Linux Real Time EUS (v.9.0) kernel-rt-5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-core-5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-debug-5.14.0-70.85.1.rt21.156.el9_0 +7
- Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0) kernel-rt-5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-core-5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-debug-5.14.0-70.85.1.rt21.156.el9_0 +9
- RHSA-2024:0448 Released 2024-01-25 · Red Hat rating Importantkernel security and bug fix update
- Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-tools-libs-devel-5.14.0-284.48.1.el9_2
- Red Hat Enterprise Linux AppStream EUS (v.9.2) kernel-64k-debug-devel-5.14.0-284.48.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.48.1.el9_2, kernel-64k-devel-5.14.0-284.48.1.el9_2 +10
- Red Hat Enterprise Linux BaseOS EUS (v.9.2) bpftool-7.0.0-284.48.1.el9_2, kernel-5.14.0-284.48.1.el9_2, kernel-64k-5.14.0-284.48.1.el9_2 +29
- RHSA-2024:0439 Released 2024-01-25 · Red Hat rating Importantkernel-rt security update
- Red Hat Enterprise Linux Real Time EUS (v.9.2) kernel-rt-5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-core-5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-debug-5.14.0-284.48.1.rt14.333.el9_2 +9
- Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) kernel-rt-5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-core-5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-debug-5.14.0-284.48.1.rt14.333.el9_2 +11
- RHSA-2024:0412 Released 2024-01-25 · Red Hat rating Importantkernel security and bug fix update
- Red Hat CodeReady Linux Builder EUS (v.8.6) kernel-tools-libs-devel-4.18.0-372.87.1.el8_6
- Red Hat Enterprise Linux BaseOS EUS (v.8.6) bpftool-4.18.0-372.87.1.el8_6, kernel-4.18.0-372.87.1.el8_6, kernel-abi-stablelists-4.18.0-372.87.1.el8_6 +19
- Red Hat Virtualization 4 Hypervisor for RHEL 8 kernel-devel-4.18.0-372.87.1.el8_6, perf-4.18.0-372.87.1.el8_6
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
| Red Hat CodeReady Linux Builder EUS (v.8.6) | Fixed | RHSA-2024:0412 |
| Red Hat CodeReady Linux Builder EUS (v.8.8) | Fixed | RHSA-2024:0575 |
| Red Hat CodeReady Linux Builder EUS (v.9.0) | Fixed | RHSA-2024:0432 |
| Red Hat CodeReady Linux Builder EUS (v.9.2) | Fixed | RHSA-2024:0448 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2024:2394 |
| Red Hat Enterprise Linux AppStream EUS (v.9.0) | Fixed | RHSA-2024:0432 |
| Red Hat Enterprise Linux AppStream EUS (v.9.2) | Fixed | RHSA-2024:0448 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2024:3138 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2024:2394 |
| Red Hat Enterprise Linux BaseOS EUS (v.8.6) | Fixed | RHSA-2024:0412 |
| Red Hat Enterprise Linux BaseOS EUS (v.8.8) | Fixed | RHSA-2024:0575 |
| Red Hat Enterprise Linux BaseOS EUS (v.9.0) | Fixed | RHSA-2024:0432 |
| Red Hat Enterprise Linux BaseOS EUS (v.9.2) | Fixed | RHSA-2024:0448 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | RHSA-2024:3138 |
| Red Hat Enterprise Linux CRB (v. 9) | Fixed | RHSA-2024:2394 |
| Red Hat Enterprise Linux NFV (v. 8) | Fixed | RHSA-2024:2950 |
| Red Hat Enterprise Linux NFV (v. 9) | Fixed | RHSA-2024:2394 |
| Red Hat Enterprise Linux RT (v. 8) | Fixed | RHSA-2024:2950 |
| Red Hat Enterprise Linux RT (v. 9) | Fixed | RHSA-2024:2394 |
| Red Hat Enterprise Linux Real Time EUS (v.9.0) | Fixed | RHSA-2024:0431 |
| Red Hat Enterprise Linux Real Time EUS (v.9.2) | Fixed | RHSA-2024:0439 |
| Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0) | Fixed | RHSA-2024:0431 |
| Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) | Fixed | RHSA-2024:0439 |
| Red Hat Virtualization 4 Hypervisor for RHEL 8 | Fixed | RHSA-2024:0412 |
Not affected: 2 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux AppStream EUS (v.9.2)
Timeline
- 2026-10-02 Threatist record created from CVE-2023-3567
- 2026-10-03 Alias added: GHSA-cgvp-6hhh-fqwh
References
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Sources
- CVE-2023-3567 · CVE Program
- CVE-2023-3567 · NVD
- FIRST EPSS
- GHSA-cgvp-6hhh-fqwh · GitHub Advisory Database · CC BY 4.0
- CVE-2023-3567 · Red Hat security data · CC BY 4.0
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