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TI-2020-10066 Aliases CVE-2020-12657GHSA-9rm7-vxm7-wq42

An issue was discovered in the Linux kernel before 5.6.5.

Priority LOW 35CWE-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

An issue was discovered in the Linux kernel before 5.6.5. There is a use-after-free in block/bfq-iosched.c related to bfq_idle_slice_timer_body.

Why it matters now

EPSS 0.00711 53rd percentileScored 2026-11-07
Fix Fixed Red Hat: 6 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

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

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*before 5.6.5VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 5.6.5 Vulnerable ·Linux

Remediation

Red Hat 6 advisories

  • RHSA-2020:2667 Released 2020-06-23 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat CodeReady Linux Builder EUS (v. 8.1) kernel-tools-libs-devel-4.18.0-147.20.1.el8_1
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.1) bpftool-4.18.0-147.20.1.el8_1, kernel-4.18.0-147.20.1.el8_1, kernel-abi-whitelists-4.18.0-147.20.1.el8_1 +19
  • RHSA-2020:2669 Released 2020-06-23 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.1) kpatch-patch-4_18_0-147-1-14.el8, kpatch-patch-4_18_0-147_0_2-1-10.el8, kpatch-patch-4_18_0-147_0_3-1-10.el8 +4
  • RHSA-2020:2567 Released 2020-06-15 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS (v. 8) kpatch-patch-4_18_0-193-1-3.el8, kpatch-patch-4_18_0-193_1_2-1-1.el8_2
Show 3 more Red Hat advisories
  • RHSA-2020:2427 Released 2020-06-09 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat CodeReady Linux Builder (v. 8) kernel-tools-libs-devel-4.18.0-193.6.3.el8_2
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-193.6.3.el8_2, kernel-4.18.0-193.6.3.el8_2, kernel-abi-whitelists-4.18.0-193.6.3.el8_2 +19
  • RHSA-2020:2429 Released 2020-06-09 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux BaseOS E4S (v. 8.0) bpftool-4.18.0-80.23.2.el8_0, kernel-4.18.0-80.23.2.el8_0, kernel-abi-whitelists-4.18.0-80.23.2.el8_0 +14
  • RHSA-2020:2428 Released 2020-06-09 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux Real Time (v. 8) kernel-rt-4.18.0-193.6.3.rt13.59.el8_2, kernel-rt-core-4.18.0-193.6.3.rt13.59.el8_2, kernel-rt-debug-4.18.0-193.6.3.rt13.59.el8_2 +7
    • Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt-4.18.0-193.6.3.rt13.59.el8_2, kernel-rt-core-4.18.0-193.6.3.rt13.59.el8_2, kernel-rt-debug-4.18.0-193.6.3.rt13.59.el8_2 +9

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat CodeReady Linux Builder (v. 8)Fixed RHSA-2020:2427
Red Hat CodeReady Linux Builder EUS (v. 8.1)Fixed RHSA-2020:2667
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2020:2427, RHSA-2020:2567
Red Hat Enterprise Linux BaseOS E4S (v. 8.0)Fixed RHSA-2020:2429
Red Hat Enterprise Linux BaseOS EUS (v. 8.1)Fixed RHSA-2020:2667, RHSA-2020:2669
Red Hat Enterprise Linux Real Time (v. 8)Fixed RHSA-2020:2428
Red Hat Enterprise Linux Real Time for NFV (v. 8)Fixed RHSA-2020:2428
Not affected: 4 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise MRG 2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-12657
  2. 2026-10-03 Alias added: GHSA-9rm7-vxm7-wq42

References

Patch 3

Advisory 6

Other 1

  • 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