CVE-2026-63969 Affecting perf-debuginfo package, versions <1:6.1.176-220.358.amzn2023
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-AMZN2023-PERFDEBUGINFO-18528299
- published5 Aug 2026
- disclosed19 Jul 2026
Introduced: 19 Jul 2026
NewCVE-2026-63969 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2023 perf-debuginfo to version 1:6.1.176-220.358.amzn2023 or higher.
This issue was patched in ALAS2023-2026-1924.
NVD Description
Note: Versions mentioned in the description apply only to the upstream perf-debuginfo package and not the perf-debuginfo package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
ipv6: fix possible infinite loop in rt6_fill_node()
Sashiko reported this issue [1]. Apply the same fix as commit f8d8ce1b515a ("ipv6: fix possible infinite loop in fib6_info_uses_dev()").
Writers holding tb6_lock can list_del_rcu(&rt->fib6_siblings) without waiting for RCU readers; rt->fib6_siblings.next then still points into the old ring and this softirq-side walker never reaches &rt->fib6_siblings, causing a CPU stall. fib6_del_route() always WRITE_ONCE()s rt->fib6_nsiblings to 0 before list_del_rcu(), so an inside-loop check is a reliable detach signal.
[1] https://sashiko.dev/#/patchset/20260526020227.4857-1-jiayuan.chen%40linux.dev
References
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-63969
- https://git.kernel.org/stable/c/279853aec9f58d5cd723e6e5617c1c3337b30383
- https://git.kernel.org/stable/c/5e40de719ee76b8d96e2556ce36dbd3bd07bf37d
- https://git.kernel.org/stable/c/9f72412bcf60144f252b0d6205106abf14344abc
- https://git.kernel.org/stable/c/b014a63d2f2c2c767762b548381882dfb1655529
- https://git.kernel.org/stable/c/c65b1f60237daac7c56c2652e064cc566a45dc81
- https://git.kernel.org/stable/c/dc36a04621dcc2447dae428709207810b6c06e14