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TI-2021-22304 Aliases CVE-2021-47670GHSA-g3pp-67rc-cjg2

can: peak_usb: fix use after free bugs

Priority LOW 39CWE-416Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
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 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

In the Linux kernel, the following vulnerability has been resolved: can: peak_usb: fix use after free bugs After calling peak_usb_netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the can_frame cf which aliases skb memory is accessed after the peak_usb_netif_rx_ni(). Reordering the lines solves the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00224 13th percentileScored 2026-11-07
Fix Fixed Linux (Linux): 4.19.171, 5.4.93, 5.10.11 +1Red Hat: 6 advisories

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

VendorProductAffected versionsFixed inStatusSource
LinuxLinux4.0 and later4.19.171, 5.4.93, 5.10.11, 5.11Patch availableCNA
  • Linux VendorLinux Affected 4.0 and later Fixed in 4.19.171, 5.4.93, 5.10.11, 5.11 Patch available CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*4.0 to before 4.19.171; 4.20 to before 5.4.93; 5.5 to before 5.10.11VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.11:rc1:*:*:*:*:*:*5.11 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.11:rc2:*:*:*:*:*:*5.11 rc2VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.11:rc3:*:*:*:*:*:*5.11 rc3VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.11:rc4:*:*:*:*:*:*5.11 rc4VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.0 to before 4.19.171; 4.20 to before 5.4.93; 5.5 to before 5.10.11 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.11:rc1:*:*:*:*:*:* Versions 5.11 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.11:rc2:*:*:*:*:*:* Versions 5.11 rc2 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.11:rc3:*:*:*:*:*:* Versions 5.11 rc3 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.11:rc4:*:*:*:*:*:* Versions 5.11 rc4 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 4.19.171, 5.4.93, 5.10.11, 5.11

Red Hat 6 advisories

  • RHSA-2025:15035 Released 2025-09-02 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.170.1.el8_4, kernel-4.18.0-305.170.1.el8_4, kernel-abi-stablelists-4.18.0-305.170.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bpftool-4.18.0-305.170.1.el8_4, kernel-4.18.0-305.170.1.el8_4, kernel-abi-stablelists-4.18.0-305.170.1.el8_4 +14
  • RHSA-2025:14692 Released 2025-08-27 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.158.1.el8_6, kernel-4.18.0-372.158.1.el8_6, kernel-abi-stablelists-4.18.0-372.158.1.el8_6 +14
    • Red Hat Enterprise Linux BaseOS E4S (v.8.6) bpftool-4.18.0-372.158.1.el8_6, kernel-4.18.0-372.158.1.el8_6, kernel-abi-stablelists-4.18.0-372.158.1.el8_6 +19
    • Red Hat Enterprise Linux BaseOS TUS (v.8.6) bpftool-4.18.0-372.158.1.el8_6, kernel-4.18.0-372.158.1.el8_6, kernel-abi-stablelists-4.18.0-372.158.1.el8_6 +14
  • RHSA-2025:14511 Released 2025-08-25 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.107.1.el8_8, kernel-4.18.0-477.107.1.el8_8, kernel-abi-stablelists-4.18.0-477.107.1.el8_8 +14
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.107.1.el8_8, kernel-4.18.0-477.107.1.el8_8, kernel-abi-stablelists-4.18.0-477.107.1.el8_8 +14
Show 3 more Red Hat advisories
  • RHSA-2025:14136 Released 2025-08-20 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) bpftool-4.18.0-193.164.1.el8_2, kernel-4.18.0-193.164.1.el8_2, kernel-abi-whitelists-4.18.0-193.164.1.el8_2 +14
  • RHSA-2025:13589 Released 2025-08-11 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.69.1.el8_10, kernel-4.18.0-553.69.1.el8_10, kernel-abi-stablelists-4.18.0-553.69.1.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.69.1.el8_10
  • RHSA-2025:13590 Released 2025-08-11 · Red Hat rating Moderate
    kernel-rt security update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.69.1.rt7.410.el8_10, kernel-rt-core-4.18.0-553.69.1.rt7.410.el8_10, kernel-rt-debug-4.18.0-553.69.1.rt7.410.el8_10 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.69.1.rt7.410.el8_10, kernel-rt-core-4.18.0-553.69.1.rt7.410.el8_10, kernel-rt-debug-4.18.0-553.69.1.rt7.410.el8_10 +7

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2025:13589
Red Hat Enterprise Linux BaseOS AUS (v. 8.2)Fixed RHSA-2025:14136
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2025:15035
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2025:14692
Red Hat Enterprise Linux BaseOS E4S (v.8.6)Fixed RHSA-2025:14692
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2025:14511
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)Fixed RHSA-2025:15035
Red Hat Enterprise Linux BaseOS TUS (v.8.6)Fixed RHSA-2025:14692
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2025:14511
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2025:13589
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2025:13590
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2025:13590
Not affected: 4 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-47670
  2. 2026-10-03 Alias added: GHSA-g3pp-67rc-cjg2

References

Patch 4

  • 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
See all 15278 →

Sources

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