Use after free in [UNKNOWN] kernel
Priority LOW 34CWE-416Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.
Summary
A flaw was found in the crypto subsystem of the Linux kernel before version kernel-4.15-rc4. The "null skcipher" was being dropped when each af_alg_ctx was freed instead of when the aead_tfm was freed. This can cause the null skcipher to be freed while it is still in use leading to a local user being able to crash the system or possibly escalate privileges.
Why it matters now
EPSS 0.00426 37th percentileScored 2026-11-07
Fix Fixed Red Hat: 1 advisory
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 |
|---|---|---|---|---|---|
| [UNKNOWN] | kernel | kernel-4.15-rc4 | — | No fix listed | CNA |
- kernel Vendor[UNKNOWN] Affected kernel-4.15-rc4 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 4.14 to before 4.14.8 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:4.15:rc1:*:*:*:*:*:* | 4.15 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:4.15:rc2:*:*:*:*:*:* | 4.15 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:4.15:rc3:*:*:*:*:*:* | 4.15 rc3 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.14 to before 4.14.8 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:4.15:rc1:*:*:*:*:*:* Versions 4.15 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:4.15:rc2:*:*:*:*:*:* Versions 4.15 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:4.15:rc3:*:*:*:*:*:* Versions 4.15 rc3 Vulnerable ·Linux
Remediation
Red Hat 1 advisory
- RHSA-2018:2948 Released 2018-10-30 · Red Hat rating Importantkernel-alt security, bug fix, and enhancement update
- Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) kernel-4.14.0-115.el7a, kernel-abi-whitelists-4.14.0-115.el7a, kernel-alt-4.14.0-115.el7a +9
- Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) kernel-debug-devel-4.14.0-115.el7a, kernel-tools-libs-devel-4.14.0-115.el7a
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) | Fixed | RHSA-2018:2948 |
| Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) | Fixed | RHSA-2018:2948 |
Not affected: 5 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise MRG 2
Timeline
- 2026-10-02 Threatist record created from CVE-2018-14619
- 2026-10-03 Alias added: GHSA-r8cr-q337-j896
References
More Linux Kernel vulnerabilities
- TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2018-14619 · CVE Program
- CVE-2018-14619 · NVD
- FIRST EPSS
- GHSA-r8cr-q337-j896 · GitHub Advisory Database · CC BY 4.0
- CVE-2018-14619 · 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