Description
fs/namei.c in the Linux kernel before 5.5 has a may_create_in_sticky use-after-free, which allows local users to cause a denial of service (OOPS) or possibly obtain sensitive information from kernel memory, aka CID-d0cb50185ae9. One attack vector may be an open system call for a UNIX domain socket, if the socket is being moved to a new parent directory and its old parent directory is being removed.
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 | 5.4.19-1 | — |
| Debian 13 | linux | 5.4.19-1 | — |
| Debian 12 | linux | 5.4.19-1 | — |
| Debian 10 | linux | 4.19.98-1+deb10u1 | DSA-4667-1 |
| Debian 9 | linux | 4.9.210-1+deb9u1 | DSA-4698-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 8 | linux-4.9 | 4.9.210-1+deb9u1~deb8u1 | DLA-2242-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +2 | No fix yet | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-96.97 | USN-4318-1 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1065.69 | USN-4324-1 |
| Ubuntu 18.04 LTS | linux-aws-5.0 +3 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-azure | 5.0.0-1036.38 | USN-4325-1 |
| Ubuntu 18.04 LTS | linux-azure-5.3 | 5.3.0-1019.20~18.04.1 | USN-4319-1 |
| Ubuntu 18.04 LTS | linux-gcp | 5.0.0-1034.35 | USN-4325-1 |
| Ubuntu 18.04 LTS | linux-gcp-5.3 +1 | 5.3.0-1017.18~18.04.1 | USN-4319-1 |
| Ubuntu 18.04 LTS | linux-gke-4.15 | 4.15.0-1057.60 | USN-4324-1 |
| Ubuntu 18.04 LTS | linux-gke-5.0 | 5.0.0-1033.34 | USN-4325-1 |
| Ubuntu 18.04 LTS | linux-hwe | 5.3.0-46.38~18.04.1 | USN-4319-1 |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1058.59 | USN-4324-1 |
| Ubuntu 18.04 LTS | linux-oem | 4.15.0-1079.89 | USN-4324-1 |
| Ubuntu 18.04 LTS | linux-oem-osp1 | 5.0.0-1047.52 | USN-4325-1 |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1037.41 | USN-4324-1 |
| Ubuntu 18.04 LTS | linux-oracle-5.0 | 5.0.0-1014.19 | USN-4325-1 |
| Ubuntu 18.04 LTS | linux-oracle-5.3 | 5.3.0-1014.15~18.04.1 | USN-4319-1 |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1060.64 | USN-4324-1 |
| Ubuntu 18.04 LTS | linux-raspi2-5.3 | 5.3.0-1022.24~18.04.1 | USN-4319-1 |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1076.83 | USN-4324-1 |
| Ubuntu 16.04 LTS | linux | 4.4.0-177.207 | USN-4320-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1105.116 | USN-4320-1 |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1065.69~16.04.1 | USN-4324-1 |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1077.82 | USN-4324-1 |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1060.64 | USN-4324-1 |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-96.97~16.04.1 | USN-4318-1 |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1069.76 | USN-4320-1 |
| Ubuntu 16.04 LTS | linux-oracle | 4.15.0-1037.41~16.04.1 | USN-4324-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1131.140 | USN-4320-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1135.143 | USN-4320-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1032.37 | — |
| Ubuntu Pro 18.04 LTS | linux | 4.15.0-96.97 | LSN-0065-1 |
| Ubuntu Pro 18.04 LTS | linux-azure | 5.0.0-1036.38 | LSN-0065-1 |
| Ubuntu Pro 18.04 LTS | linux-gcp | 5.0.0-1034.35 | LSN-0065-1 |
| Ubuntu Pro 16.04 LTS | linux | 4.4.0-177.207 | LSN-0065-1 |
| Ubuntu Pro 16.04 LTS | linux-aws | 4.4.0-1105.116 | LSN-0065-1 |
| Ubuntu Pro 16.04 LTS | linux-azure | 4.15.0-1077.82 | LSN-0065-1 |
| Ubuntu Pro 16.04 LTS | linux-hwe | 4.15.0-96.97~16.04.1 | LSN-0065-1 |
| Ubuntu Pro 14.04 LTS | linux-aws | 4.4.0-1065.69 | USN-4320-1 |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1077.82~14.04.1 | USN-4324-1 |
| Ubuntu Pro 14.04 LTS | linux-lts-xenial | 4.4.0-177.207~14.04.1 | USN-4320-1, LSN-0065-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | kernel-azure +2 | 4.12.14-8.27.1 | SUSE-SU-2020:0511-1 |
| SLES 15 SP1 | kernel-docs +5 | 4.12.14-197.34.1 | SUSE-SU-2020:0560-1 |
| SLES 15 | kernel-docs +6 | 4.12.14-150.52.1 | SUSE-SU-2020:1663-1 |
| SLES 12 SP5 | kernel-azure +2 | 4.12.14-16.10.1 | SUSE-SU-2020:0558-1 |
| SLES 12 SP5 | kernel-docs | 4.12.14-122.17.2 | SUSE-SU-2020:0580-1 |
| SLES 12 SP5 | kernel-syms +3 | 4.12.14-122.17.1 | SUSE-SU-2020:0580-1 |
| SLES 12 SP4 | kernel-azure +2 | 4.12.14-6.37.1 | SUSE-SU-2020:0559-1 |
| SLES 12 SP4 | kernel-docs +4 | 4.12.14-95.48.1 | SUSE-SU-2020:0584-1 |
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 | 4.12.14-16.10.1 | SUSE-SU-2020:0558-1 |
| SLES for SAP 12 SP5 | kernel-syms +2 | 4.12.14-122.17.1 | SUSE-SU-2020:0580-1 |
| SLES for SAP 12 SP4 | kernel-azure +2 | 4.12.14-6.37.1 | SUSE-SU-2020:0559-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.48.1 | SUSE-SU-2020:0584-1 |
| SLE Real Time 12 SP5 | kernel-rt +3 | 4.12.14-10.5.1 | SUSE-SU-2020:0667-1 |
| SLE Real Time 12 SP4 | kernel-rt +3 | 4.12.14-8.15.1 | SUSE-SU-2020:0649-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-197.34.1 | SUSE-SU-2020:0560-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_9 | 1-3.5.1 | SUSE-SU-2020:0560-1 |
| 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 | 4.12.14-122.17.1 | SUSE-SU-2020:0580-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_3 | 1-8.5.1 | SUSE-SU-2020:0580-1 |
| SLE Live Patching 12 SP4 | kernel-default | 4.12.14-95.48.1 | SUSE-SU-2020:0584-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_12 | 1-6.3.1 | SUSE-SU-2020:0584-1 |
| 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 | 4.12.14-14.17.1 | SUSE-SU-2020:0613-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.1 | kernel-docs +8 | 4.12.14-lp151.28.40.1 | openSUSE-SU-2020:0336-1 |
Advisories 20
- USN-4318-1 linux, linux-hwe vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- LSN-0065-1 Kernel Live Patch Security Notice Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4324-1 linux-aws, linux-aws-hwe, linux-azure, linux-gcp, linux-gke-4.15, linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4320-1 linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerability Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4325-1 linux-azure, linux-gcp, linux-gke-5.0, linux-oem-osp1, linux-oracle-5.0 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4319-1 linux, linux-aws, linux-gcp, linux-gcp-5.3, linux-hwe, linux-kvm, linux-oracle, linux-oracle-5.3, linux-raspi2, linux-raspi2-5.3 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- DSA-4667-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-4698-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2242-1 linux-4.9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2020:0649-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0584-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0559-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0580-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0336-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0560-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0558-1 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-2020:0511-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0667-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2020:0613-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
References
- https://www.openwall.com/lists/oss-security/2020/01/28/2
- https://github.com/torvalds/linux/commit/d0cb50185ae942b03c4327be322055d622dc79f6
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d0cb50185ae942b03c4327be322055d622dc79f6
- [oss-security] 20200129 Re: Linux kernel: user-triggerable read-after-free crash or 1-bit infoleak oracle in open(2) mailing-list
- [oss-security] 20200202 Re: Linux kernel: user-triggerable read-after-free crash or 1-bit infoleak oracle in open(2) mailing-list
- https://security.netapp.com/advisory/ntap-20200313-0003/
- openSUSE-SU-2020:0336 vendor-advisory
- USN-4320-1 vendor-advisory
- USN-4318-1 vendor-advisory
- http://packetstormsecurity.com/files/157233/Kernel-Live-Patch-Security-Notice-LSN-0065-1.html
- USN-4324-1 vendor-advisory
- USN-4325-1 vendor-advisory
- USN-4319-1 vendor-advisory
- DSA-4667 vendor-advisory
- [debian-lts-announce] 20200610 [SECURITY] [DLA 2242-1] linux-4.9 security update mailing-list
- DSA-4698 vendor-advisory