Description
A flaw was found in the IPv6 module of the Linux kernel. The arg.result was not used consistently in fib6_rule_lookup, sometimes holding rt6_info and other times fib6_info. This was not accounted for in other parts of the code where rt6_info was expected unconditionally, potentially leading to a kernel panic in fib6_rule_suppress.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | Linux Kernel (IPv6) | Fixed in kernel 5.2-rc1 | — |
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 | 5.2.6-1 | — |
| Debian 13 | linux | 5.2.6-1 | — |
| Debian 12 | linux | 5.2.6-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-riscv +23 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | kernel-rt +12 | 4.18.0-372.9.1.rt7.166.el8 | RHSA-2022:1975 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhev Hypervisor 4 | perf +2 | 4.18.0-372.46.1.el8_6 | RHSA-2023:1130 |
| RHEL 8.6 EUS | perf +26 | 4.18.0-372.46.1.el8_6 | RHSA-2023:1130 |
Advisories 3
- RHSA-2022:1975 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2023:1130 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- WID-SEC-2023-1343 Linux Kernel: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · May 31, 2023