Use after free in Linux Kernel
Priority LOW 33CWE-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: 13 fixed, 1 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.
Summary
A use-after-free flaw was found in nfsd4_ssc_setup_dul in fs/nfsd/nfs4proc.c in the NFS filesystem in the Linux Kernel. This issue could allow a local attacker to crash the system or it may lead to a kernel information leak problem.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00246 15th percentileScored 2026-11-07
Fix Partial Red Hat: 5 advisoriesRed Hat: 13 fixed, 1 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 | Kernel 6.2 RC5 | — | No fix listed | CNA |
- Linux Kernel Vendor— Affected Kernel 6.2 RC5 Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.14 to before 5.15.91; 5.16 to before 6.1.9 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:* | 6.2 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:* | 6.2 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.2:rc3:*:*:*:*:*:* | 6.2 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.2:rc4:*:*:*:*:*:* | 6.2 rc4 | Vulnerable | Linux |
| cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Red Hat |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.14 to before 5.15.91; 5.16 to before 6.1.9 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:* Versions 6.2 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:* Versions 6.2 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.2:rc3:*:*:*:*:*:* Versions 6.2 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.2:rc4:*:*:*:*:*:* Versions 6.2 rc4 Vulnerable ·Linux
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Red Hat
Remediation
Red Hat 5 advisories
- RHSA-2025:10671 Released 2025-07-09 · Red Hat rating Importantkernel security update
- Red Hat Enterprise Linux AppStream E4S (v.9.2) kernel-64k-debug-devel-5.14.0-284.124.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.124.1.el9_2, kernel-64k-devel-5.14.0-284.124.1.el9_2 +10
- Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool-7.0.0-284.124.1.el9_2, kernel-5.14.0-284.124.1.el9_2, kernel-64k-5.14.0-284.124.1.el9_2 +29
- RHSA-2025:10675 Released 2025-07-09 · Red Hat rating Importantkernel-rt security update
- Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt-5.14.0-284.124.1.rt14.409.el9_2, kernel-rt-core-5.14.0-284.124.1.rt14.409.el9_2, kernel-rt-debug-5.14.0-284.124.1.rt14.409.el9_2 +9
- Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt-5.14.0-284.124.1.rt14.409.el9_2, kernel-rt-core-5.14.0-284.124.1.rt14.409.el9_2, kernel-rt-debug-5.14.0-284.124.1.rt14.409.el9_2 +11
- RHSA-2025:10193 Released 2025-07-02 · Red Hat rating Moderatekernel-rt security update
- Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt-5.14.0-70.136.1.rt21.208.el9_0, kernel-rt-core-5.14.0-70.136.1.rt21.208.el9_0, kernel-rt-debug-5.14.0-70.136.1.rt21.208.el9_0 +9
- Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt-5.14.0-70.136.1.rt21.208.el9_0, kernel-rt-core-5.14.0-70.136.1.rt21.208.el9_0, kernel-rt-debug-5.14.0-70.136.1.rt21.208.el9_0 +7
Show 2 more Red Hat advisories
- RHSA-2025:10174 Released 2025-07-01 · Red Hat rating Moderatekernel security update
- Red Hat Enterprise Linux AppStream E4S (v.9.0) kernel-debug-devel-5.14.0-70.136.1.el9_0, kernel-debug-devel-matched-5.14.0-70.136.1.el9_0, kernel-devel-5.14.0-70.136.1.el9_0 +5
- Red Hat Enterprise Linux BaseOS E4S (v.9.0) bpftool-5.14.0-70.136.1.el9_0, kernel-5.14.0-70.136.1.el9_0, kernel-abi-stablelists-5.14.0-70.136.1.el9_0 +14
- RHSA-2023:6583 Released 2023-11-07 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- Red Hat CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-362.8.1.el9_3, libperf-5.14.0-362.8.1.el9_3
- Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-362.8.1.el9_3, kernel-64k-debug-devel-matched-5.14.0-362.8.1.el9_3, kernel-64k-devel-5.14.0-362.8.1.el9_3 +11
- Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.2.0-362.8.1.el9_3, kernel-5.14.0-362.8.1.el9_3, kernel-64k-5.14.0-362.8.1.el9_3 +29
- Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-362.8.1.el9_3, kernel-rt-core-5.14.0-362.8.1.el9_3, kernel-rt-debug-5.14.0-362.8.1.el9_3 +9
- Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-362.8.1.el9_3, kernel-rt-core-5.14.0-362.8.1.el9_3, kernel-rt-debug-5.14.0-362.8.1.el9_3 +11
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
| Red Hat CodeReady Linux Builder (v. 9) | Fixed | RHSA-2023:6583 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2023:6583 |
| Red Hat Enterprise Linux AppStream E4S (v.9.0) | Fixed | RHSA-2025:10174 |
| Red Hat Enterprise Linux AppStream E4S (v.9.2) | Fixed | RHSA-2025:10671 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2023:6583 |
| Red Hat Enterprise Linux BaseOS E4S (v.9.0) | Fixed | RHSA-2025:10174 |
| Red Hat Enterprise Linux BaseOS E4S (v.9.2) | Fixed | RHSA-2025:10671 |
| Red Hat Enterprise Linux NFV E4S (v.9.0) | Fixed | RHSA-2025:10193 |
| Red Hat Enterprise Linux Real Time (v. 9) | Fixed | RHSA-2023:6583 |
| Red Hat Enterprise Linux Real Time E4S (v.9.0) | Fixed | RHSA-2025:10193 |
| Red Hat Enterprise Linux Real Time E4S (v.9.2) | Fixed | RHSA-2025:10675 |
| Red Hat Enterprise Linux Real Time for NFV (v. 9) | Fixed | RHSA-2023:6583 |
| Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) | Fixed | RHSA-2025:10675 |
Not affected: 3 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
Timeline
- 2026-10-02 Threatist record created from CVE-2023-1652
- 2026-10-03 Alias added: GHSA-rrfg-8crh-5vmr
- 2026-11-05 Affected versions changed · Red Hat
References
Sources
- CVE-2023-1652 · CVE Program
- CVE-2023-1652 · NVD
- FIRST EPSS
- GHSA-rrfg-8crh-5vmr · GitHub Advisory Database · CC BY 4.0
- CVE-2023-1652 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences