Description
ext4_empty_dir in fs/ext4/namei.c in the Linux kernel through 5.3.12 allows a NULL pointer dereference because ext4_read_dirblock(inode,0,DIRENT_HTREE) can be zero.
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 | 5.4.8-1 | — |
| Debian 13 | linux | 5.4.8-1 | — |
| Debian 12 | linux | 5.4.8-1 | — |
| Debian 8 | linux-4.9 | 4.9.210-1~deb8u1 | DLA-2114-1 |
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 | 4.15.0-88.88 | — |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1060.62 | — |
| Ubuntu 18.04 LTS | linux-aws-5.0 | 5.0.0-1025.28 | — |
| Ubuntu 18.04 LTS | linux-azure | 5.0.0-1032.34 | — |
| Ubuntu 18.04 LTS | linux-azure-5.3 | 5.3.0-1013.14~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-gcp | 5.0.0-1031.32 | — |
| Ubuntu 18.04 LTS | linux-gcp-5.3 +1 | 5.3.0-1012.13~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-gcp-edge +2 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gke-4.15 | 4.15.0-1052.55 | — |
| Ubuntu 18.04 LTS | linux-gke-5.0 | 5.0.0-1030.31 | — |
| Ubuntu 18.04 LTS | linux-hwe | 5.3.0-40.32~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1053.53 | — |
| Ubuntu 18.04 LTS | linux-oem | 4.15.0-1073.83 | — |
| Ubuntu 18.04 LTS | linux-oem-osp1 | 5.0.0-1039.44 | — |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1033.36 | — |
| Ubuntu 18.04 LTS | linux-oracle-5.0 | 5.0.0-1011.16 | — |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1055.59 | — |
| Ubuntu 18.04 LTS | linux-raspi2-5.3 | 5.3.0-1018.20~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1072.79 | — |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1060.62~16.04.1 | — |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1071.76 | — |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1055.59 | — |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-88.88~16.04.1 | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu 16.04 LTS | linux-oracle | 4.15.0-1033.36~16.04.1 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1071.76~14.04.1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | kernel-uek +5 | 4.1.12-124.46.3.el7uek | ELSA-2021-9002, ELSA-2020-5804 |
| Oracle Linux 7 | perf +5 | 4.14.35-1902.305.4.el7uek | ELSA-2020-5804 |
Advisories 4
- DLA-2114-1 linux-4.9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- WID-SEC-2025-2771 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Dec 9, 2025
- ELSA-2021-9002 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jan 7, 2021
- ELSA-2020-5804 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 10, 2020