Description
In the Linux kernel 4.19.83, there is a use-after-free (read) in the debugfs_remove function in fs/debugfs/inode.c (which is used to remove a file or directory in debugfs that was previously created with a call to another debugfs function such as debugfs_create_file). NOTE: Linux kernel developers dispute this issue as not being an issue with debugfs, instead this is an issue with misuse of debugfs within blktrace
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 5.7.17-1 | — |
| Debian 13 | linux | 5.7.17-1 | — |
| Debian 12 | linux | 5.7.17-1 | — |
| Debian 9 | linux-4.19 | 4.19.160-2~deb9u1 | DLA-2483-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-realtime +1 | No fix yet | — |
| Ubuntu 20.04 LTS | linux | 5.4.0-51.56 | — |
| Ubuntu 20.04 LTS | linux-aws +2 | 5.4.0-1028.29 | — |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1031.32 | — |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1026.27 | — |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1021.24 | — |
| Ubuntu 20.04 LTS | linux-raspi2 +1 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-riscv | 5.4.0-36.41 | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-129.132 | USN-4680-1 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1091.96 | USN-4680-1 |
| Ubuntu 18.04 LTS | linux-aws-5.4 +2 | 5.4.0-1028.29~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-azure-4.15 | 4.15.0-1103.114 | USN-4680-1 |
| Ubuntu 18.04 LTS | linux-azure-5.4 | 5.4.0-1031.32~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-dell300x | 4.15.0-1010.14 | — |
| Ubuntu 18.04 LTS | linux-gcp +12 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-4.15 | 4.15.0-1091.104 | USN-4680-1 |
| Ubuntu 18.04 LTS | linux-gke-5.4 | 5.4.0-1027.28~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-gkeop-5.4 | 5.4.0-1003.3 | — |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-51.56~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1082.84 | USN-4680-1 |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1062.68 | USN-4680-1 |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1021.24~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-raspi2 +1 | 4.15.0-1077.82 | USN-4680-1 |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1094.103 | USN-4680-1 |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1091.96~16.04.1 | USN-4680-1 |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1103.114~16.04.1 | USN-4680-1 |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1091.104~16.04.1 | USN-4680-1 |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-129.132~16.04.1 | USN-4680-1 |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu 16.04 LTS | linux-oracle | 4.15.0-1062.68~16.04.1 | USN-4680-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS 20.04 LTS | linux-aws-fips +2 | No fix yet | — |
| Ubuntu Pro FIPS 18.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-aws-fips | 5.4.0-1069.73+fips2 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-azure-fips | 5.4.0-1073.76+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-gcp-fips | 5.4.0-1067.71~20.04.1 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2034.35 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2016.18 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1049.56 | — |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1103.114~14.04.1 | USN-4680-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | kernel-rt +12 | 4.18.0-240.rt7.54.el8 | RHSA-2020:4609 |
| RHEL 8 | perf +26 | 4.18.0-240.el8 | RHSA-2020:4431 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | kernel-tools-libs-devel | 4.18.0-240.el8 | ALSA-2020:4431 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | kernel-azure +2 | 4.12.14-8.30.1 | SUSE-SU-2020:1087-1 |
| SLES 15 SP1 | kernel-docs +5 | 4.12.14-197.40.1 | SUSE-SU-2020:1146-1 |
| SLES 15 | kernel-docs +6 | 4.12.14-150.52.1 | SUSE-SU-2020:1663-1 |
| SLES 12 SP5 | kernel-azure +2 | 4.12.14-16.13.1 | SUSE-SU-2020:1118-1 |
| SLES 12 SP5 | kernel-docs +4 | 4.12.14-122.20.1 | SUSE-SU-2020:1142-1 |
| SLES 12 SP4 | kernel-azure +2 | 4.12.14-6.40.1 | SUSE-SU-2020:1119-1 |
| SLES 12 SP4 | kernel-docs +4 | 4.12.14-95.51.1 | SUSE-SU-2020:1141-1 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 | kernel-docs +5 | 4.12.14-150.52.1 | SUSE-SU-2020:1663-1 |
| SLES for SAP 12 SP5 | kernel-azure +2 | 4.12.14-16.13.1 | SUSE-SU-2020:1118-1 |
| SLES for SAP 12 SP5 | kernel-syms +2 | 4.12.14-122.20.1 | SUSE-SU-2020:1142-1 |
| SLES for SAP 12 SP4 | kernel-azure +2 | 4.12.14-6.40.1 | SUSE-SU-2020:1119-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.51.1 | SUSE-SU-2020:1141-1 |
| SLE Real Time 12 SP5 | kernel-rt +3 | 4.12.14-10.8.1 | SUSE-SU-2020:1084-1 |
| SLE Real Time 12 SP4 | kernel-rt +3 | 4.12.14-8.18.1 | SUSE-SU-2020:1085-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-197.40.1 | SUSE-SU-2020:1146-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_11 | 1-3.3.1 | SUSE-SU-2020:1146-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-150.52.1 | SUSE-SU-2020:1663-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_18 | 1-1.5.1 | SUSE-SU-2020:1663-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.20.1 | SUSE-SU-2020:1142-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_4 | 1-8.3.1 | SUSE-SU-2020:1142-1 |
| SLE Live Patching 12 SP4 | kernel-default | 4.12.14-95.51.1 | SUSE-SU-2020:1141-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_13 | 1-6.3.1 | SUSE-SU-2020:1141-1 |
| SLE HPC 15 | kernel-docs +5 | 4.12.14-150.52.1 | SUSE-SU-2020:1663-1 |
| SUSE Real Time Module 15 SP1 | kernel-rt +3 | 4.12.14-14.23.1 | SUSE-SU-2020:1123-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.1 | kernel-docs +8 | 4.12.14-lp151.28.48.1 | openSUSE-SU-2020:0543-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | kernel-livepatch-4.14.209-160.335 | 1.0-0.amzn2 | ALAS2-2020-1566 |
| Amazon Linux 2 | perf +8 | 4.14.209-160.335.amzn2 | ALAS2-2020-1566 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | perf +19 | 4.18.0-240.el8 | ELSA-2020-4431 |
Advisories 19
- ALSA-2020:4431 Moderate: kernel security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2020:4431 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2020:4609 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- USN-4680-1 linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-gke-4.15, linux-hwe, linux-kvm, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- DLA-2483-1 linux-4.19 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2020:1087-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1118-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0543-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1123-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1663-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1084-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1142-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1141-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1146-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1119-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1085-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2022-2096 Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · May 30, 2024
- ALAS2-2020-1566 Important: kernel security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Dec 8, 2020
- ELSA-2020-4431 Moderate: kernel security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 10, 2020
References
- https://bugzilla.kernel.org/show_bug.cgi?id=205713
- https://security.netapp.com/advisory/ntap-20200103-0001/
- https://lore.kernel.org/linux-block/20200402000002.7442-1-mcgrof%40kernel.org/
- openSUSE-SU-2020:0543 vendor-advisory
- [debian-lts-announce] 20201210 [SECURITY] [DLA 2483-1] linux-4.19 security update mailing-list