Description
The Linux kernel before 6.5.4 has an es1 use-after-free in fs/ext4/extents_status.c, related to ext4_es_insert_extent.
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 | 6.5.6-1 | — |
| Debian 13 | linux | 6.5.6-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi | 6.7.0-1001.1 | — |
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-aws-6.5 | 6.5.0-1011.11~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-azure-6.5 | 6.5.0-1010.10~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-nvidia-6.5 | 6.5.0-1007.7 | — |
| Ubuntu 22.04 LTS | linux-oem-6.5 | 6.5.0-1009.10 | USN-6536-1 |
| Ubuntu 22.04 LTS | linux-riscv +13 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +26 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | kernel | 5.15.135.1-2 | — |
Advisories 6
- USN-6536-1 linux, linux-aws, linux-laptop, linux-lowlatency, linux-oem-6.5, linux-oracle, linux-raspi, linux-starfive vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- SSA-265688 SSA-265688: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 TM MFP V1.1 Siemens ProductCERT · Oct 13, 2026
- SSA-398330 SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5 Siemens ProductCERT · Oct 13, 2026
- ICSA-24-102-01 Siemens SIMATIC S7-1500 TM MFP CISA ICS & IT advisories · May 14, 2026
- ICSA-23-348-10 Siemens SIMATIC S7-1500 CISA ICS & IT advisories · Aug 12, 2025
- WID-SEC-2023-2645 Linux Kernel: Schwachstelle ermöglicht nicht spezifizierten Angriff BSI CERT-Bund (WID) · Apr 8, 2024
References
- https://lore.kernel.org/lkml/aa03f191-445c-0d2e-d6d7-0a3208d7df7a%40huawei.com/T/
- https://www.spinics.net/lists/stable-commits/msg317086.html
- https://lkml.org/lkml/2023/8/13/477
- https://github.com/torvalds/linux/commit/768d612f79822d30a1e7d132a4d4b05337ce42ec
- https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.4