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VulnerabilityPublished Updated

CVE-2026-46333: Linux kernel · ptrace: slightly saner 'get_dumpable()' logic

Affects Linux kernelSource CVE Database V5

0
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Public exploit available · CVSS 7.1 High · fixed in 4709234fd1b95136ceb789f639b1e7ea5de1b181 : patch Linux kernel as a priority.

Data as of 10 Nov 2026, 13:04 UTC

CVSS 3.1 base score
7.1High
How severe the flaw is on the 0–10 CVSS scale.

Sources agree

CVSS scores by source
CNA (Linux)CVSS 3.17.1
ADP (redhat-SADP)CVSS 3.17.8
CISA SSVC
Exploitation
Proof of concept is public or traded
Automatable
Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact
Total control over the software or total information disclosure

CISA SSVC assessment, 2026-05-21.

Patch
Available – fixed in 4709234fd1b95136ceb789f639b1e7ea5de1b181, 01363cb3fbd0238ffdeb09f53e9039c9edf8a730, 93d4ba49d18e3d7fb41a9927c2d0cca5e9dfefd6 +9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Exploitation evidence

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

  1. Disclosed: evidence found.

    CVE published 15 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    CISA SSVC: proof of concept public

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

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

    No attack traffic recorded by OffSeq Mirage sensors

Timeline

  1. CVE ID reserved

    by kernel.org

    , 46 hours before disclosure

  2. CVE published

    on cve.org

    , t = 0

  3. CISA SSVC assessment

    proof of concept public

    , 6 days after disclosure

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CISA SSVC, the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • >=3.16.52 <3.17
  • >=4.4.40 <4.5
  • >=4.8.16 <4.9
  • >=4.9.1 <4.10
Fixed in
  • 4709234fd1b95136ceb789f639b1e7ea5de1b181
  • 01363cb3fbd0238ffdeb09f53e9039c9edf8a730
  • 93d4ba49d18e3d7fb41a9927c2d0cca5e9dfefd6
  • 31e62c2ebbfdc3fe3dbdf5e02c92a9dc67087a3a
  • 15b828a46f305ae9f05a7c16914b3ce273474205
  • 8f907d345bae8f4b3f004c5abc56bf2dfb851ea7
  • 6e5b51e74a40d377bcd3081dd33fbaa0e1aa7e3d
  • 4.10
  • 4.9
  • 4.5
  • 3.17
  • 2a93a4fac7b6051d3be7cd1b015fe7320cd0404d
LinuxLinuxAffected
  • =4.10
Fixed in–

AI-suggested

Patches fixing this vulnerability have been released in Linux kernel versions 4.5, 4.9, 4.10, and later. Users should apply these official fixes promptly. For Red Hat Enterprise Linux systems, follow the Red Hat security advisory RHSB-2026-004 for detailed remediation steps. In container environments, using default restricted security context constraints that disable privilege escalation can mitigate the risk. No additional action is required if these mitigations are in place.

Description

CVE-2026-46333 is a vulnerability in the Linux kernel's ptrace subsystem related to the 'get_dumpable()' logic. It allows a local unprivileged user to read sensitive root-owned files due to a race condition during process termination. This flaw can lead to disclosure of sensitive data such as SSH host private keys or /etc/shadow contents. The vulnerability affects multiple Linux kernel versions prior to the fixed releases. Red Hat has issued advisories and patches to address this issue.

References

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