Description
A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.
The function nft_trans_gc_catchall did not remove the catchall set element from the catchall_list when the argument sync is true, making it possible to free a catchall set element many times.
We recommend upgrading past commit 93995bf4af2c5a99e2a87f0cd5ce547d31eb7630.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Kernel | 6.6 – < 6.7 | 6.7 |
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 | 6.5.13-1 | — |
| Debian 13 | linux | 6.5.13-1 | — |
| Debian 12 | linux | 6.1.64-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | linux-oem-6.1 | 6.1.0-1028.28 | USN-6576-1 |
| Ubuntu 22.04 LTS | linux-riscv +11 | 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 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | kernel-livepatch-6.1.66-91.160 | 1.0-0.amzn2023 | ALAS2023-2023-461 |
| Amazon Linux 2023 | perf +13 | 6.1.66-91.160.amzn2023 | ALAS2023-2023-461 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | kernel | 6.6.29.1-4 | — |
| Azure Linux 2 (CBL-Mariner) | hyperv-daemons | 5.15.143.1-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | bpftool +13 | 5.15.0-203.146.5.1.el9uek | ELSA-2024-12159 |
Advisories 4
- USN-6576-1 linux-oem-6.1 vulnerability Ubuntu Security Notices (USN) · Feb 10, 2026
- ALAS2023-2023-461 Important: kernel security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 18, 2025
- WID-SEC-2023-2903 Linux Kernel: Schwachstelle ermöglicht Privilegieneskalation BSI CERT-Bund (WID) · Feb 14, 2024
- ELSA-2024-12159 Important: Unbreakable Enterprise kernel security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Feb 13, 2024
References
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=93995bf4af2c5a99e2a87f0cd5ce547d31eb7630 patch
- https://kernel.dance/93995bf4af2c5a99e2a87f0cd5ce547d31eb7630
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IG6IF3FUY7LVZJMFRPANAU4L4PSJ3ESQ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YQ7JVDEDZV5SNHG5EW7RHKK2ZN56HSGB/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3S55P23EYAWDHXZPJEVTGIRZZRICYI3Z/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3OXWBKK7RTQOGGDLQGCZFS753VLGS2GD/