Use after free in Linux kernel ext4 filesystem
Priority LOW 31CWE-416Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 20 fixed, 2 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.
Summary
A use-after-free vulnerability was found in the Linux kernel's ext4 filesystem in the way it handled the extra inode size for extended attributes. This flaw could allow a privileged local user to cause a system crash or other undefined behaviors.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00239 15th percentileScored 2026-11-07
Fix Partial Red Hat: 10 advisoriesRed Hat: 20 fixed, 2 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Linux kernel ext4 filesystem | Fixed in kernel 6.0-rc1 | — | No fix listed | CNA |
- Linux kernel ext4 filesystem Vendor— Affected Fixed in kernel 6.0-rc1 Fixed in — No fix listed CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | up to 5.19 | Vulnerable | Linux |
| cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| 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:linux:linux_kernel:*:*:*:*:*:*:*:* Versions up to 5.19 Vulnerable ·Linux
- cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- 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
Remediation
Red Hat 10 advisories
- RHSA-2025:15670 Released 2025-09-11 · Red Hat rating Importantkernel security update
- Red Hat Enterprise Linux AppStream E4S (v.9.0) kernel-debug-devel-5.14.0-70.146.1.el9_0, kernel-debug-devel-matched-5.14.0-70.146.1.el9_0, kernel-devel-5.14.0-70.146.1.el9_0 +5
- Red Hat Enterprise Linux BaseOS E4S (v.9.0) bpftool-5.14.0-70.146.1.el9_0, kernel-5.14.0-70.146.1.el9_0, kernel-abi-stablelists-5.14.0-70.146.1.el9_0 +14
- RHSA-2025:15660 Released 2025-09-11 · Red Hat rating Importantkernel security update
- Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.172.1.el8_4, kernel-4.18.0-305.172.1.el8_4, kernel-abi-stablelists-4.18.0-305.172.1.el8_4 +13
- Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bpftool-4.18.0-305.172.1.el8_4, kernel-4.18.0-305.172.1.el8_4, kernel-abi-stablelists-4.18.0-305.172.1.el8_4 +13
- RHSA-2025:15658 Released 2025-09-10 · Red Hat rating Importantkernel-rt security update
- Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt-5.14.0-70.146.1.rt21.218.el9_0, kernel-rt-core-5.14.0-70.146.1.rt21.218.el9_0, kernel-rt-debug-5.14.0-70.146.1.rt21.218.el9_0 +9
- Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt-5.14.0-70.146.1.rt21.218.el9_0, kernel-rt-core-5.14.0-70.146.1.rt21.218.el9_0, kernel-rt-debug-5.14.0-70.146.1.rt21.218.el9_0 +7
Show 7 more Red Hat advisories
- RHSA-2025:15656 Released 2025-09-10 · Red Hat rating Importantkernel security update
- Red Hat Enterprise Linux BaseOS AUS (v. 8.2) bpftool-4.18.0-193.168.1.el8_2, kernel-4.18.0-193.168.1.el8_2, kernel-abi-whitelists-4.18.0-193.168.1.el8_2 +13
- RHSA-2025:15649 Released 2025-09-10 · Red Hat rating Importantkernel security update
- Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.110.1.el8_8, kernel-4.18.0-477.110.1.el8_8, kernel-abi-stablelists-4.18.0-477.110.1.el8_8 +13
- 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
- RHSA-2023:7077 Released 2023-11-14 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- Red Hat CodeReady Linux Builder (v. 8) kernel-tools-libs-devel-4.18.0-513.5.1.el8_9
- Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-513.5.1.el8_9, kernel-4.18.0-513.5.1.el8_9, kernel-abi-stablelists-4.18.0-513.5.1.el8_9 +19
- RHSA-2023:6901 Released 2023-11-14 · Red Hat rating Importantkernel-rt security, bug fix, and enhancement update
- Red Hat Enterprise Linux Real Time (v. 8) kernel-rt-4.18.0-513.5.1.rt7.307.el8_9, kernel-rt-core-4.18.0-513.5.1.rt7.307.el8_9, kernel-rt-debug-4.18.0-513.5.1.rt7.307.el8_9 +7
- Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt-4.18.0-513.5.1.rt7.307.el8_9, kernel-rt-core-4.18.0-513.5.1.rt7.307.el8_9, kernel-rt-debug-4.18.0-513.5.1.rt7.307.el8_9 +9
- RHSA-2023:2458 Released 2023-05-09 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-284.11.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.11.1.el9_2, kernel-64k-devel-5.14.0-284.11.1.el9_2 +10
- Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.0.0-284.11.1.el9_2, kernel-5.14.0-284.11.1.el9_2, kernel-64k-5.14.0-284.11.1.el9_2 +29
- Red Hat Enterprise Linux CRB (v. 9) kernel-tools-libs-devel-5.14.0-284.11.1.el9_2
- RHSA-2023:2148 Released 2023-05-09 · Red Hat rating Importantkernel-rt security and bug fix update
- Red Hat Enterprise Linux NFV (v. 9) kernel-rt-5.14.0-284.11.1.rt14.296.el9_2, kernel-rt-core-5.14.0-284.11.1.rt14.296.el9_2, kernel-rt-debug-5.14.0-284.11.1.rt14.296.el9_2 +11
- Red Hat Enterprise Linux RT (v. 9) kernel-rt-5.14.0-284.11.1.rt14.296.el9_2, kernel-rt-core-5.14.0-284.11.1.rt14.296.el9_2, kernel-rt-debug-5.14.0-284.11.1.rt14.296.el9_2 +9
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat CodeReady Linux Builder (v. 8) | Fixed | RHSA-2023:7077 |
| Red Hat CodeReady Linux Builder EUS (v.8.6) | Fixed | RHSA-2024:0412 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2023:2458 |
| Red Hat Enterprise Linux AppStream E4S (v.9.0) | Fixed | RHSA-2025:15670 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2023:7077 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2023:2458 |
| Red Hat Enterprise Linux BaseOS AUS (v. 8.2) | Fixed | RHSA-2025:15656 |
| Red Hat Enterprise Linux BaseOS AUS (v.8.4) | Fixed | RHSA-2025:15660 |
| Red Hat Enterprise Linux BaseOS E4S (v.8.8) | Fixed | RHSA-2025:15649 |
| Red Hat Enterprise Linux BaseOS E4S (v.9.0) | Fixed | RHSA-2025:15670 |
| Red Hat Enterprise Linux BaseOS EUS (v.8.6) | Fixed | RHSA-2024:0412 |
| Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | Fixed | RHSA-2025:15660 |
| Red Hat Enterprise Linux CRB (v. 9) | Fixed | RHSA-2023:2458 |
| Red Hat Enterprise Linux NFV (v. 9) | Fixed | RHSA-2023:2148 |
| Red Hat Enterprise Linux NFV E4S (v.9.0) | Fixed | RHSA-2025:15658 |
| Red Hat Enterprise Linux RT (v. 9) | Fixed | RHSA-2023:2148 |
| Red Hat Enterprise Linux Real Time (v. 8) | Fixed | RHSA-2023:6901 |
| Red Hat Enterprise Linux Real Time E4S (v.9.0) | Fixed | RHSA-2025:15658 |
| Red Hat Enterprise Linux Real Time for NFV (v. 8) | Fixed | RHSA-2023:6901 |
| Red Hat Virtualization 4 Hypervisor for RHEL 8 | Fixed | RHSA-2024:0412 |
Not affected: 7 products
- Red Hat Enterprise Linux AppStream E4S (v.9.0)
- Red Hat Enterprise Linux BaseOS AUS (v. 8.2)
- Red Hat Enterprise Linux BaseOS AUS (v.8.4)
- Red Hat Enterprise Linux BaseOS E4S (v.8.8)
- Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
- Red Hat Enterprise Linux NFV E4S (v.9.0)
- Red Hat Enterprise Linux Real Time E4S (v.9.0)
Timeline
- 2026-10-02 Threatist record created from CVE-2023-2513
- 2026-10-03 Alias added: GHSA-8m42-pwwf-cc8j
References
Sources
- CVE-2023-2513 · CVE Program
- CVE-2023-2513 · NVD
- FIRST EPSS
- GHSA-8m42-pwwf-cc8j · GitHub Advisory Database · CC BY 4.0
- CVE-2023-2513 · Red Hat security data · CC BY 4.0
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