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TI-2022-23743 Aliases CVE-2022-47929GHSA-cmq9-w454-24mf

In the Linux kernel before 6.1.6, a NULL pointer dereference bug in the traffic control…

Priority MEDIUM 58CWE-476Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 12 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-476.

Summary

In the Linux kernel before 6.1.6, a NULL pointer dereference bug in the traffic control subsystem allows an unprivileged user to trigger a denial of service (system crash) via a crafted traffic control configuration that is set up with "tc qdisc" and "tc class" commands. This affects qdisc_graft in net/sched/sch_api.c.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0104 64th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 5 advisoriesRed Hat: 12 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*before 6.1.6VulnerableLinux
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*11.0VulnerableDebian
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 6.1.6 Vulnerable ·Linux
  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian

Remediation

Red Hat 5 advisories

  • RHSA-2024:0412 Released 2024-01-25 · Red Hat rating Important
    kernel 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-2023:2951 Released 2023-05-16 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-477.10.1.el8_8, kernel-4.18.0-477.10.1.el8_8, kernel-abi-stablelists-4.18.0-477.10.1.el8_8 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-477.10.1.el8_8
  • RHSA-2023:2736 Released 2023-05-16 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-core-4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-debug-4.18.0-477.10.1.rt7.274.el8_8 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-core-4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-debug-4.18.0-477.10.1.rt7.274.el8_8 +7
Show 2 more Red Hat advisories
  • RHSA-2023:2458 Released 2023-05-09 · Red Hat rating Important
    kernel 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 Important
    kernel-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 →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
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 BaseOS (v. 8)Fixed RHSA-2023:2951
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2023:2458
Red Hat Enterprise Linux BaseOS EUS (v.8.6)Fixed RHSA-2024:0412
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2023:2951
Red Hat Enterprise Linux CRB (v. 9)Fixed RHSA-2023:2458
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2023:2736
Red Hat Enterprise Linux NFV (v. 9)Fixed RHSA-2023:2148
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2023:2736
Red Hat Enterprise Linux RT (v. 9)Fixed RHSA-2023:2148
Red Hat Virtualization 4 Hypervisor for RHEL 8Fixed RHSA-2024:0412

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-47929
  2. 2026-10-03 Alias added: GHSA-cmq9-w454-24mf

References

Exploit 1

Patch 2

Advisory 2

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences