Read the docs
TI-2020-17819 Aliases CVE-2020-29661GHSA-p865-45gc-8x47

A locking issue was discovered in the tty subsystem of the Linux kernel through 5.9.13.

Priority LOW 36CWE-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 locking issue was discovered in the tty subsystem of the Linux kernel through 5.9.13. drivers/tty/tty_jobctrl.c allows a use-after-free attack against TIOCSPGRP, aka CID-54ffccbf053b.

Why it matters now

EPSS 0.0112 66th percentileScored 2026-11-07
Fix Fixed Red Hat: 17 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 · 20

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*2.6.26 to before 4.4.248; 4.5 to before 4.9.248; 4.10 to before 4.14.212; 4.15 to before 4.19.163; 4.20 to before 5.4.83; 5.5 to before 5.9.14VulnerableLinux
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*32VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*33VulnerableFedoraproject
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*not specified by NVDVulnerableNetApp
cpe:2.3:o:broadcom:fabric_operating_system:-:*:*:*:*:*:*:*not specified by NVDVulnerableBroadcom
cpe:2.3:o:netapp:solidfire_baseboard_management_controller_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:h:netapp:solidfire_baseboard_management_controller:-:*:*:*:*:*:*:*not specified by NVDRunning onNetApp
cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 2.6.26 to before 4.4.248; 4.5 to before 4.9.248; 4.10 to before 4.14.212; 4.15 to before 4.19.163; 4.20 to before 5.4.83; 5.5 to before 5.9.14 Vulnerable ·Linux
  • cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
  • cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:o:broadcom:fabric_operating_system:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Broadcom
  • cpe:2.3:o:netapp:solidfire_baseboard_management_controller_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:h:netapp:solidfire_baseboard_management_controller:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
  • cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
Show 10 more CPE
CPEVersionsRoleVendor
cpe:2.3:h:netapp:h410c:-:*:*:*:*:*:*:*not specified by NVDRunning onNetApp
cpe:2.3:o:netapp:a700s_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:h:netapp:a700s:-:*:*:*:*:*:*:*not specified by NVDRunning onNetApp
cpe:2.3:o:netapp:8300_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:h:netapp:8300:-:*:*:*:*:*:*:*not specified by NVDRunning onNetApp
cpe:2.3:o:netapp:8700_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:h:netapp:8700:-:*:*:*:*:*:*:*not specified by NVDRunning onNetApp
cpe:2.3:o:netapp:a400_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:h:netapp:a400:-:*:*:*:*:*:*:*not specified by NVDRunning onNetApp
cpe:2.3:a:oracle:tekelec_platform_distribution:*:*:*:*:*:*:*:*7.4.0 – 7.7.1VulnerableOracle
  • cpe:2.3:h:netapp:h410c:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
  • cpe:2.3:o:netapp:a700s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:h:netapp:a700s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
  • cpe:2.3:o:netapp:8300_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:h:netapp:8300:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
  • cpe:2.3:o:netapp:8700_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:h:netapp:8700:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
  • cpe:2.3:o:netapp:a400_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:h:netapp:a400:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
  • cpe:2.3:a:oracle:tekelec_platform_distribution:*:*:*:*:*:*:*:* Versions 7.4.0 – 7.7.1 Vulnerable ·Oracle

Remediation

Red Hat 17 advisories

  • RHSA-2021:2164 Released 2021-06-01 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux Server AUS (v. 7.4) kernel-3.10.0-693.87.1.el7, kernel-abi-whitelists-3.10.0-693.87.1.el7, kernel-debug-3.10.0-693.87.1.el7 +7
    • Red Hat Enterprise Linux Server E4S (v. 7.4) kernel-3.10.0-693.87.1.el7, kernel-abi-whitelists-3.10.0-693.87.1.el7, kernel-bootwrapper-3.10.0-693.87.1.el7 +8
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.4) kernel-tools-libs-devel-3.10.0-693.87.1.el7
    • Red Hat Enterprise Linux Server Optional E4S (v. 7.4) kernel-debug-devel-3.10.0-693.87.1.el7, kernel-tools-libs-devel-3.10.0-693.87.1.el7
    • Red Hat Enterprise Linux Server Optional TUS (v. 7.4) kernel-tools-libs-devel-3.10.0-693.87.1.el7
    • Red Hat Enterprise Linux Server TUS (v. 7.4) kernel-3.10.0-693.87.1.el7, kernel-abi-whitelists-3.10.0-693.87.1.el7, kernel-debug-3.10.0-693.87.1.el7 +7
  • RHSA-2021:1288 Released 2021-04-20 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Server (v. 6 ELS) kernel-2.6.32-754.39.1.el6, kernel-abi-whitelists-2.6.32-754.39.1.el6, kernel-debug-2.6.32-754.39.1.el6 +7
    • Red Hat Enterprise Linux Server Optional (v. 6 ELS) python-perf-2.6.32-754.39.1.el6
  • RHSA-2021:1028 Released 2021-03-30 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.7) bpftool-3.10.0-1062.46.1.el7, kernel-3.10.0-1062.46.1.el7, kernel-abi-whitelists-3.10.0-1062.46.1.el7 +8
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7) kernel-tools-libs-devel-3.10.0-1062.46.1.el7
    • Red Hat Enterprise Linux Server EUS (v. 7.7) bpftool-3.10.0-1062.46.1.el7, kernel-3.10.0-1062.46.1.el7, kernel-abi-whitelists-3.10.0-1062.46.1.el7 +11
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.7) kernel-debug-devel-3.10.0-1062.46.1.el7, kernel-tools-libs-devel-3.10.0-1062.46.1.el7
Show 14 more Red Hat advisories
  • RHSA-2021:1031 Released 2021-03-30 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux Server EUS (v. 7.7) kpatch-patch-3_10_0-1062_21_1-1-3.el7, kpatch-patch-3_10_0-1062_26_1-1-1.el7, kpatch-patch-3_10_0-1062_30_1-1-1.el7 +8
  • RHSA-2021:0940 Released 2021-03-18 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux Server EUS (v. 7.6) kpatch-patch-3_10_0-957_46_1-1-4.el7, kpatch-patch-3_10_0-957_48_1-1-4.el7, kpatch-patch-3_10_0-957_54_1-1-1.el7 +7
  • RHSA-2021:0878 Released 2021-03-16 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) bpftool-3.10.0-957.70.1.el7, kernel-3.10.0-957.70.1.el7, kernel-abi-whitelists-3.10.0-957.70.1.el7 +8
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) kernel-tools-libs-devel-3.10.0-957.70.1.el7
    • Red Hat Enterprise Linux Server EUS (v. 7.6) bpftool-3.10.0-957.70.1.el7, kernel-3.10.0-957.70.1.el7, kernel-abi-whitelists-3.10.0-957.70.1.el7 +11
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.6) kernel-debug-devel-3.10.0-957.70.1.el7, kernel-tools-libs-devel-3.10.0-957.70.1.el7
    • Red Hat Virtualization 4.2 Hypervisor for RHEL 7.6 EUS kernel-devel-3.10.0-957.70.1.el7, perf-3.10.0-957.70.1.el7, python-perf-3.10.0-957.70.1.el7
  • RHSA-2021:0856 Released 2021-03-16 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) bpftool-3.10.0-1160.21.1.el7, kernel-3.10.0-1160.21.1.el7, kernel-abi-whitelists-3.10.0-1160.21.1.el7 +8
    • Red Hat Enterprise Linux Client Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.21.1.el7
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.21.1.el7
    • Red Hat Enterprise Linux Server (v. 7) bpftool-3.10.0-1160.21.1.el7, kernel-3.10.0-1160.21.1.el7, kernel-abi-whitelists-3.10.0-1160.21.1.el7 +11
    • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debug-devel-3.10.0-1160.21.1.el7, kernel-tools-libs-devel-3.10.0-1160.21.1.el7
    • Red Hat Enterprise Linux Workstation (v. 7) bpftool-3.10.0-1160.21.1.el7, kernel-3.10.0-1160.21.1.el7, kernel-abi-whitelists-3.10.0-1160.21.1.el7 +8
    • Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.21.1.el7
  • RHSA-2021:0857 Released 2021-03-16 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt-3.10.0-1160.21.1.rt56.1158.el7, kernel-rt-debug-3.10.0-1160.21.1.rt56.1158.el7, kernel-rt-debug-devel-3.10.0-1160.21.1.rt56.1158.el7 +4
    • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt-3.10.0-1160.21.1.rt56.1158.el7, kernel-rt-debug-3.10.0-1160.21.1.rt56.1158.el7, kernel-rt-debug-devel-3.10.0-1160.21.1.rt56.1158.el7 +7
  • RHSA-2021:0862 Released 2021-03-16 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux Server (v. 7) kpatch-patch-3_10_0-1160-1-3.el7, kpatch-patch-3_10_0-1160_11_1-1-2.el7, kpatch-patch-3_10_0-1160_15_2-1-2.el7 +3
  • RHSA-2021:0765 Released 2021-03-09 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder EUS (v. 8.2) kernel-tools-libs-devel-4.18.0-193.46.1.el8_2
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.2) bpftool-4.18.0-193.46.1.el8_2, kernel-4.18.0-193.46.1.el8_2, kernel-abi-whitelists-4.18.0-193.46.1.el8_2 +19
  • RHSA-2021:0774 Released 2021-03-09 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux Real Time EUS (v. 8.2) kernel-rt-4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-core-4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-debug-4.18.0-193.46.1.rt13.96.el8_2 +7
    • Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2) kernel-rt-4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-core-4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-debug-4.18.0-193.46.1.rt13.96.el8_2 +9
  • RHSA-2021:0763 Released 2021-03-09 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.2) kpatch-patch-4_18_0-193-1-10.el8, kpatch-patch-4_18_0-193_13_2-1-5.el8_2, kpatch-patch-4_18_0-193_14_3-1-5.el8_2 +8
  • RHSA-2021:0689 Released 2021-03-03 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.1) kpatch-patch-4_18_0-147_13_2-1-8.el8_1, kpatch-patch-4_18_0-147_20_1-1-7.el8_1, kpatch-patch-4_18_0-147_24_2-1-5.el8_1 +5
  • RHSA-2021:0686 Released 2021-03-03 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat CodeReady Linux Builder EUS (v. 8.1)
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.1) kernel-4.18.0-147.43.1.el8_1, kernel-core-4.18.0-147.43.1.el8_1, kernel-debug-4.18.0-147.43.1.el8_1 +12
  • RHSA-2021:0537 Released 2021-02-16 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux Real Time (v. 8) kernel-rt-4.18.0-240.15.1.rt7.69.el8_3, kernel-rt-core-4.18.0-240.15.1.rt7.69.el8_3, kernel-rt-debug-4.18.0-240.15.1.rt7.69.el8_3 +7
    • Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt-4.18.0-240.15.1.rt7.69.el8_3, kernel-rt-core-4.18.0-240.15.1.rt7.69.el8_3, kernel-rt-debug-4.18.0-240.15.1.rt7.69.el8_3 +9
  • RHSA-2021:0558 Released 2021-02-16 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder (v. 8) kernel-tools-libs-devel-4.18.0-240.15.1.el8_3
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-240.15.1.el8_3, kernel-4.18.0-240.15.1.el8_3, kernel-abi-whitelists-4.18.0-240.15.1.el8_3 +19
  • RHSA-2021:0354 Released 2021-02-02 · Red Hat rating Important
    kernel-alt security update
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) kernel-4.14.0-115.35.1.el7a, kernel-abi-whitelists-4.14.0-115.35.1.el7a, kernel-alt-4.14.0-115.35.1.el7a +8
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) kernel-debug-devel-4.14.0-115.35.1.el7a, kernel-tools-libs-devel-4.14.0-115.35.1.el7a

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-2021:0558
Red Hat CodeReady Linux Builder EUS (v. 8.1)Fixed RHSA-2021:0686
Red Hat CodeReady Linux Builder EUS (v. 8.2)Fixed RHSA-2021:0765
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2021:0558
Red Hat Enterprise Linux BaseOS EUS (v. 8.1)Fixed RHSA-2021:0686, RHSA-2021:0689
Red Hat Enterprise Linux BaseOS EUS (v. 8.2)Fixed RHSA-2021:0763, RHSA-2021:0765
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2021:0856
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2021:0856
Red Hat Enterprise Linux ComputeNode EUS (v. 7.6)Fixed RHSA-2021:0878
Red Hat Enterprise Linux ComputeNode EUS (v. 7.7)Fixed RHSA-2021:1028
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2021:0856
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6)Fixed RHSA-2021:0878
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7)Fixed RHSA-2021:1028
Red Hat Enterprise Linux Real Time (v. 8)Fixed RHSA-2021:0537
Red Hat Enterprise Linux Real Time EUS (v. 8.2)Fixed RHSA-2021:0774
Red Hat Enterprise Linux Real Time for NFV (v. 8)Fixed RHSA-2021:0537
Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2)Fixed RHSA-2021:0774
Red Hat Enterprise Linux Server (v. 6 ELS)Fixed RHSA-2021:1288
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2021:0856, RHSA-2021:0862
Red Hat Enterprise Linux Server AUS (v. 7.4)Fixed RHSA-2021:2164
Red Hat Enterprise Linux Server E4S (v. 7.4)Fixed RHSA-2021:2164
Red Hat Enterprise Linux Server EUS (v. 7.6)Fixed RHSA-2021:0878, RHSA-2021:0940
Red Hat Enterprise Linux Server EUS (v. 7.7)Fixed RHSA-2021:1028, RHSA-2021:1031
Red Hat Enterprise Linux Server Optional (v. 6 ELS)Fixed RHSA-2021:1288
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2021:0856
Red Hat Enterprise Linux Server Optional AUS (v. 7.4)Fixed RHSA-2021:2164
Red Hat Enterprise Linux Server Optional E4S (v. 7.4)Fixed RHSA-2021:2164
Red Hat Enterprise Linux Server Optional EUS (v. 7.6)Fixed RHSA-2021:0878
Red Hat Enterprise Linux Server Optional EUS (v. 7.7)Fixed RHSA-2021:1028
Red Hat Enterprise Linux Server Optional TUS (v. 7.4)Fixed RHSA-2021:2164
Red Hat Enterprise Linux Server TUS (v. 7.4)Fixed RHSA-2021:2164
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2021:0856
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2021:0856
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)Fixed RHSA-2021:0354
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)Fixed RHSA-2021:0354
Red Hat Enterprise Linux for Real Time (v. 7)Fixed RHSA-2021:0857
Red Hat Enterprise Linux for Real Time for NFV (v. 7)Fixed RHSA-2021:0857
Red Hat Virtualization 4.2 Hypervisor for RHEL 7.6 EUSFixed RHSA-2021:0878
Not affected: 2 products
  • Red Hat CodeReady Linux Builder EUS (v. 8.1)
  • Red Hat Enterprise Linux BaseOS EUS (v. 8.1)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-29661
  2. 2026-10-03 Alias added: GHSA-p865-45gc-8x47

References

Patch 3

Advisory 8

Sources

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