5.5

CVE-2026-43240: linux

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2026-43240DEBIAN-CVE-2026-43240
Published 06-05-2026Last modified 19-06-2026
Open JSON

Vulnerability summary

CVE-2026-43240 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.12% chance of exploitation in the next 30 days, higher than 1.8% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.12%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 27 · Related 27
OPENSUSE-SU-2026:21388-1OPENSUSE-SU-2026:21555-1SUSE-SU-2026:22742-1SUSE-SU-2026:22769-1SUSE-SU-2026:22809-1SUSE-SU-2026:22810-1

Timeline

  1. 06-05-2026
    PublishedVulnerability first disclosed.
  2. 19-06-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.12%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

0.00 pp

From 0.12% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.12%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu131 products
  • linux< 6.8.0-146.146 | All versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1066.69 | All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ b69a2afd5afce9bf6d56e349d6ab592c916e20f2, < 37f18915a261afe84dab462624ed829cddb77a9b | ≥ b69a2afd5afce9bf6d56e349d6ab592c916e20f2, < 22e460b6333a5f818b042ac89201f8e735556f4a | ≥ b69a2afd5afce9bf6d56e349d6ab592c916e20f2, < 7e2476057950c174c7b2c2802246707bbfb497e4 | ≥ b69a2afd5afce9bf6d56e349d6ab592c916e20f2, < f8f73bf0f8a57ee9b86792456bd42079bc98c6b7 | ≥ b69a2afd5afce9bf6d56e349d6ab592c916e20f2, < d4a132f121c591b60dbaf57ea91f1faf11631fbc | ≥ b69a2afd5afce9bf6d56e349d6ab592c916e20f2, < 4d7a8f5f28187e3d2958b2a134473da2665207e7 | ≥ b69a2afd5afce9bf6d56e349d6ab592c916e20f2, < c5489d04337b47e93c0623e8145fcba3f5739efd | 6.0
  • linux_kernel≥ 6.0, < 6.1.165 | ≥ 6.2, < 6.6.128 | ≥ 6.7, < 6.12.75 | ≥ 6.13, < 6.18.16 | ≥ 6.19, < 6.19.6
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.19.6-1

3 vendors · 134 products

References

17 links
Show all 17 references