An issue was discovered in net/tipc/crypto.c in the Linux kernel before 5.14.16.
Priority HIGH 76CWE-1284Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
An issue was discovered in net/tipc/crypto.c in the Linux kernel before 5.14.16. The Transparent Inter-Process Communication (TIPC) functionality allows remote attackers to exploit insufficient validation of user-supplied sizes for the MSG_CRYPTO message type.
Why it matters now
EPSS 0.57853 99th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Red Hat: 7 advisories
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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 17
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.10 to before 5.10.77; 5.11 to before 5.14.16 | Vulnerable | Linux |
| cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | 34 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* | 35 | Vulnerable | Fedoraproject |
| cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h300e_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.10 to before 5.10.77; 5.11 to before 5.14.16 Vulnerable ·Linux
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Versions 35 Vulnerable ·Fedoraproject
- cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h300e_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
Show 7 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:h:netapp:h300e:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h500e_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h500e:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h700e_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h700e:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
- cpe:2.3:h:netapp:h300e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h500e_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h500e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h700e_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h700e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
Remediation
Red Hat 7 advisories
- RHSA-2021:4750 Released 2021-11-19 · Red Hat rating ImportantRed Hat Virtualization Host security and bug fix update [ovirt-4.4.9] 0-day
- Red Hat Virtualization 4 Hypervisor for RHEL 8 redhat-virtualization-host-4.4.9-202111172338_8.5, redhat-virtualization-host-image-update-4.4.9-202111172338_8.5
- RHSA-2021:4647 Released 2021-11-15 · Red Hat rating Importantkernel security update
- Red Hat CodeReady Linux Builder (v. 8) kernel-tools-libs-devel-4.18.0-348.2.1.el8_5
- Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-348.2.1.el8_5, kernel-4.18.0-348.2.1.el8_5, kernel-abi-stablelists-4.18.0-348.2.1.el8_5 +19
- RHSA-2021:4650 Released 2021-11-15 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- Red Hat Enterprise Linux BaseOS EUS (v.8.4) bpftool-4.18.0-305.28.1.el8_4, kernel-4.18.0-305.28.1.el8_4, kernel-abi-stablelists-4.18.0-305.28.1.el8_4 +19
- Red Hat Enterprise Linux CRB EUS (v.8.4) kernel-tools-libs-devel-4.18.0-305.28.1.el8_4
Show 4 more Red Hat advisories
- RHSA-2021:4644 Released 2021-11-15 · Red Hat rating Importantkpatch-patch security update
- Red Hat Enterprise Linux BaseOS EUS (v.8.4) kpatch-patch-4_18_0-305-1-8.el8, kpatch-patch-4_18_0-305_10_2-1-5.el8_4, kpatch-patch-4_18_0-305_12_1-1-4.el8_4 +5
- RHSA-2021:4645 Released 2021-11-15 · Red Hat rating Importantkpatch-patch security update
- Red Hat Enterprise Linux BaseOS (v. 8) kpatch-patch-4_18_0-348-1-1.el8
- RHSA-2021:4648 Released 2021-11-15 · Red Hat rating Importantkernel-rt security and bug fix update
- Red Hat Enterprise Linux NFV EUS (v.8.4) kernel-rt-4.18.0-305.28.1.rt7.100.el8_4, kernel-rt-core-4.18.0-305.28.1.rt7.100.el8_4, kernel-rt-debug-4.18.0-305.28.1.rt7.100.el8_4 +9
- Red Hat Enterprise Linux RT EUS (v.8.4) kernel-rt-4.18.0-305.28.1.rt7.100.el8_4, kernel-rt-core-4.18.0-305.28.1.rt7.100.el8_4, kernel-rt-debug-4.18.0-305.28.1.rt7.100.el8_4 +7
- RHSA-2021:4646 Released 2021-11-15 · Red Hat rating Importantkernel-rt security and bug fix update
- Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt-4.18.0-348.2.1.rt7.132.el8_5, kernel-rt-core-4.18.0-348.2.1.rt7.132.el8_5, kernel-rt-debug-4.18.0-348.2.1.rt7.132.el8_5 +9
- Red Hat Enterprise Linux for Real Time (v. 8) kernel-rt-4.18.0-348.2.1.rt7.132.el8_5, kernel-rt-core-4.18.0-348.2.1.rt7.132.el8_5, kernel-rt-debug-4.18.0-348.2.1.rt7.132.el8_5 +7
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat CodeReady Linux Builder (v. 8) | Fixed | RHSA-2021:4647 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2021:4645, RHSA-2021:4647 |
| Red Hat Enterprise Linux BaseOS EUS (v.8.4) | Fixed | RHSA-2021:4644, RHSA-2021:4650 |
| Red Hat Enterprise Linux CRB EUS (v.8.4) | Fixed | RHSA-2021:4650 |
| Red Hat Enterprise Linux NFV EUS (v.8.4) | Fixed | RHSA-2021:4648 |
| Red Hat Enterprise Linux RT EUS (v.8.4) | Fixed | RHSA-2021:4648 |
| Red Hat Enterprise Linux Real Time for NFV (v. 8) | Fixed | RHSA-2021:4646 |
| Red Hat Enterprise Linux for Real Time (v. 8) | Fixed | RHSA-2021:4646 |
| Red Hat Virtualization 4 Hypervisor for RHEL 8 | Fixed | RHSA-2021:4750 |
Not affected: 4 products
- RHEL 8-based RHEV-H for RHEV 4 (build requirements)
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2021-43267
- 2026-10-03 Alias added: GHSA-c22h-4v9p-5cx2
References
Sources
- CVE-2021-43267 · CVE Program
- CVE-2021-43267 · NVD
- FIRST EPSS
- GHSA-c22h-4v9p-5cx2 · GitHub Advisory Database · CC BY 4.0
- CVE-2021-43267 · 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