Out-of-bounds Read The advisory has been revoked - it doesn't affect any version of package perf6.18-debuginfo (opens in a new tab)
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-PERF618DEBUGINFO-16741773
- published18 May 2026
- disclosed6 May 2026
Introduced: 6 May 2026
CVE-2026-43240 (opens in a new tab)Amendment
The Amazon-Linux security team deemed this advisory irrelevant for Amazon-Linux:2023.
NVD Description
Note: Versions mentioned in the description apply only to the upstream perf6.18-debuginfo package and not the perf6.18-debuginfo package as distributed by Amazon-Linux.
In the Linux kernel, the following vulnerability has been resolved:
x86/kexec: add a sanity check on previous kernel's ima kexec buffer
When the second-stage kernel is booted via kexec with a limiting command line such as "mem=<size>", the physical range that contains the carried over IMA measurement list may fall outside the truncated RAM leading to a kernel panic.
BUG: unable to handle page fault for address: ffff97793ff47000
RIP: ima_restore_measurement_list+0xdc/0x45a
#PF: error_code(0x0000) – not-present page
Other architectures already validate the range with page_is_ram(), as done in commit cbf9c4b9617b ("of: check previous kernel's ima-kexec-buffer against memory bounds") do a similar check on x86.
Without carrying the measurement list across kexec, the attestation would fail.
References
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-43240
- https://git.kernel.org/stable/c/22e460b6333a5f818b042ac89201f8e735556f4a
- https://git.kernel.org/stable/c/37f18915a261afe84dab462624ed829cddb77a9b
- https://git.kernel.org/stable/c/4d7a8f5f28187e3d2958b2a134473da2665207e7
- https://git.kernel.org/stable/c/c5489d04337b47e93c0623e8145fcba3f5739efd
- https://git.kernel.org/stable/c/d4a132f121c591b60dbaf57ea91f1faf11631fbc
- https://git.kernel.org/stable/c/f8f73bf0f8a57ee9b86792456bd42079bc98c6b7
- https://git.kernel.org/stable/c/7e2476057950c174c7b2c2802246707bbfb497e4