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CVE-2026-46300VulnerabilityPublished Updated

Bundesamt für Sicherheit in der Informationstechnik Amazon · Linux Kernel (Fragnesia): Schwachstelle ermöglicht Erlangen von Administratorrechten

Affects Bundesamt für Sicherheit in der Informationstechnik AmazonSource GCVE Database

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Authoritative record:CVE-2026-46300· High 7.8

Exploited in the wild · KEV due 31 Oct 2026 · public exploit available (Metasploit, Exploit-DB) · 10% EPSS · fixed in f84eca5817390257cef78013d0112481c503b4a3 : patch Bundesamt für Sicherheit in der Informationstechnik Amazon now.

Data as of 29 Oct 2026, 12:07 UTC

CVSS 3.1 base score
7.8High
How severe the flaw is on the 0–10 CVSS scale.

Sources agree

CVSS scores by source
CNA (Linux)CVSS 3.17.8
ADP (redhat-SADP)CVSS 3.17.8
KEV deadline
 US federal agencies must patch by this date; a sensible deadline for everyone else. Other KEV due dates
EPSS
10.1% chance of exploitation in 30 days – higher than 95% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in f84eca5817390257cef78013d0112481c503b4a3, 3884358a9286b17f389a72b1426fc4547c23c111, 3599e6b3cc1ada96883d496a50a210d3afbb6987 +5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

t = 0 is the CVE’s publication on cve.org

  1. Disclosed: evidence found.

    CVE published 23 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Exploited in the wild: evidence found.

    Listed in CISA KEV 158 days after disclosure

  4. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

Timeline

  1. CVE ID reserved

    by kernel.org

    , 10 days before disclosure

  2. CVE published

    on cve.org

    , t = 0

  3. First Exploit-DB entry (opens in a new tab)

    Linux Kernel - Local Privilege Escalation

    , 6 days after disclosure

  4. , 158 days after disclosure

  5. KEV remediation due

    US federal deadline

    , 161 days after disclosure

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CISA KEV (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ cef401de7be8c4e155c6746bfccf721a4fa5fab9, < f84eca5817390257cef78013d0112481c503b4a3
Fixed in
  • f84eca5817390257cef78013d0112481c503b4a3
LinuxLinuxAffected
  • ≥ cef401de7be8c4e155c6746bfccf721a4fa5fab9, < 3884358a9286b17f389a72b1426fc4547c23c111
Fixed in
  • 3884358a9286b17f389a72b1426fc4547c23c111
LinuxLinuxAffected
  • ≥ cef401de7be8c4e155c6746bfccf721a4fa5fab9, < 3599e6b3cc1ada96883d496a50a210d3afbb6987
Fixed in
  • 3599e6b3cc1ada96883d496a50a210d3afbb6987
LinuxLinuxAffected
  • ≥ cef401de7be8c4e155c6746bfccf721a4fa5fab9, < 760e1addc27ba1a7beb4a0a7e8b3e9ec49e7a34e
Fixed in
  • 760e1addc27ba1a7beb4a0a7e8b3e9ec49e7a34e
LinuxLinuxAffected
  • ≥ cef401de7be8c4e155c6746bfccf721a4fa5fab9, < 78bf6b6bb19541d19fbda6242e7cfe2c682763c0
Fixed in
  • 78bf6b6bb19541d19fbda6242e7cfe2c682763c0
LinuxLinuxAffected
  • ≥ cef401de7be8c4e155c6746bfccf721a4fa5fab9, < 9d3e5fd19fe1063bf607219e8562fbd567b8e8d5
Fixed in
  • 9d3e5fd19fe1063bf607219e8562fbd567b8e8d5

Description

Multiple security vulnerabilities have been identified in the Linux kernel, including a logic flaw in the XFRM ESP-in-TCP subsystem known as Fragnesia (CVE-2026-46300). These flaws could allow a local attacker to escalate privileges or escape container environments. The vulnerabilities affect various kernel subsystems and architectures. Public exploit code is available, and exploitation in the wild is confirmed. Ubuntu has released security updates addressing these issues.

References

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