Description
In the Linux kernel, the following vulnerability has been resolved:
ext2: Add more validity checks for inode counts
Add checks verifying number of inodes stored in the superblock matches
the number computed from number of inodes per group. Also verify we have
at least one block worth of inodes per group. This prevents crashes on
corrupted filesystems.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 2.6.12 | 4.14.291 |
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 | 6.0.2-1 | — |
| Debian 13 | linux | 6.0.2-1 | — |
| Debian 12 | linux | 6.0.2-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 22.04 LTS | linux +1 | 5.15.0-53.59 | — |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1023.27 | — |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1023.29 | — |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1024.30.1 | — |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1022.29 | — |
| Ubuntu 22.04 LTS | linux-gke | 5.15.0-1020.25 | — |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1008.12 | — |
| Ubuntu 22.04 LTS | linux-ibm | 5.15.0-1018.21 | — |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1018.23 | — |
| Ubuntu 22.04 LTS | linux-kvm | 5.15.0-1021.26 | — |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1015.15 | — |
| Ubuntu 22.04 LTS | linux-oracle | 5.15.0-1022.28 | — |
| Ubuntu 22.04 LTS | linux-raspi | 5.15.0-1018.20 | — |
| Ubuntu 22.04 LTS | linux-riscv +32 | No fix yet | — |
| Ubuntu 20.04 LTS | linux | 5.4.0-132.148 | — |
| Ubuntu 20.04 LTS | linux-aws | 5.4.0-1089.97 | — |
| Ubuntu 20.04 LTS | linux-aws-5.15 +1 | 5.15.0-1023.27~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1095.101 | — |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1023.29~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-bluefield | 5.4.0-1050.56 | — |
| Ubuntu 20.04 LTS | linux-gcp | 5.4.0-1093.102 | — |
| Ubuntu 20.04 LTS | linux-gcp-5.15 | 5.15.0-1022.29~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-gke +28 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-hwe-5.15 +1 | 5.15.0-53.59~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-ibm | 5.4.0-1037.42 | — |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1018.23~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-iot | 5.4.0-1006.8 | — |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1079.85 | — |
| Ubuntu 20.04 LTS | linux-oracle | 5.4.0-1087.96 | — |
| Ubuntu 20.04 LTS | linux-oracle-5.15 | 5.15.0-1022.28~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1074.85 | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-197.208 | — |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1143.155 | — |
| Ubuntu 18.04 LTS | linux-aws-5.4 | 5.4.0-1089.97~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-azure-4.15 | 4.15.0-1157.172 | — |
| Ubuntu 18.04 LTS | linux-azure-5.4 | 5.4.0-1095.101~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-4.15 | 4.15.0-1138.154 | — |
| Ubuntu 18.04 LTS | linux-gcp-5.4 | 5.4.0-1093.102~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-132.148~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-ibm-5.4 | 5.4.0-1037.42~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1129.134 | — |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1108.119 | — |
| Ubuntu 18.04 LTS | linux-oracle-5.4 | 5.4.0-1087.96~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1074.85~18.04.1 | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1025.28 | — |
| Ubuntu Pro FIPS 20.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS 18.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-aws-fips | 5.4.0-1089.97+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-azure-fips | 5.4.0-1095.101+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-fips | 5.4.0-1065.74 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-gcp-fips | 5.4.0-1093.102+fips1 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2082.88 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2066.72 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1100.111 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-gcp-fips | 4.15.0-2047.52 | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro 16.04 LTS | linux +2 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | linux-aws-hwe | 4.15.0-1143.155~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-azure | 4.15.0-1159.174~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-gcp | 4.15.0-1138.154~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-hwe | 4.15.0-197.208~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-oracle | 4.15.0-1108.119~16.04.1 | — |
| Ubuntu Pro 14.04 LTS | linux +2 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1157.172~14.04.2 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | kernel-livepatch-4.14.291-218.527 | 1.0-0.amzn2 | ALAS2-2022-1838 |
| Amazon Linux 2 | perf +8 | 4.14.291-218.527.amzn2 | ALAS2-2022-1838 |
Advisories 2
- WID-SEC-2025-1350 Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Nov 10, 2026
- ALAS2-2022-1838 Important: kernel security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Aug 26, 2025
References
- https://git.kernel.org/stable/c/0bcdc31094a12b4baf59e241feabc9787cf635fa
- https://git.kernel.org/stable/c/07303a9abe3a997d9864fb4315e34b5acfe8fc25
- https://git.kernel.org/stable/c/b3f423683818cfe15de14d5d9dff44148ff16bbf
- https://git.kernel.org/stable/c/d08bb199a406424a8ed0009efdf41710e6d849ee
- https://git.kernel.org/stable/c/96b18d3a1be0354ccce43f0ef61b5a3d7e432552
- https://git.kernel.org/stable/c/7a48fdc88a3c35e046a6a0a38eba00f21c65b16e
- https://git.kernel.org/stable/c/5e63c5fe9123fa76ffaeff26c211308736ec3a07
- https://git.kernel.org/stable/c/fa78f336937240d1bc598db817d638086060e7e9