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

Description

In the Linux kernel, the following vulnerability has been resolved: ptrace: slightly saner 'get_dumpable()' logic The 'dumpability' of a task is fundamentally about the memory image of the task - the concept comes from whether it can core dump or not - and makes no sense when you don't have an associated mm. And almost all users do in fact use it only for the case where the task has a mm pointer. But we have one odd special case: ptrace_may_access() uses 'dumpable' to check various other things entirely independently of the MM (typically explicitly using flags like PTRACE_MODE_READ_FSCREDS). Including for threads that no longer have a VM (and maybe never did, like most kernel threads). It's not what this flag was designed for, but it is what it is. The ptrace code does check that the uid/gid matches, so you do have to be uid-0 to see kernel thread details, but this means that the traditional "drop capabilities" model doesn't make any difference for this all. Make it all make a *bit* more sense by saying that if you don't have a MM pointer, we'll use a cached "last dumpability" flag if the thread ever had a MM (it will be zero for kernel threads since it is never set), and require a proper CAP_SYS_PTRACE capability to override.

Public exploit

An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list a Metasploit module for it. A reference of the record is tagged as an exploit. CISA's SSVC rates its exploitation: a proof of concept is public.

Show the exploits2

Metasploit modules1 module

References tagged exploit1 reference

Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from

Timeline

  1. ID reserved

    By Linux

  2. · 2 days later

    Published

  3. · 6 months later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-46333, by who scored it
Scored byCVSSScoreVector
LinuxCNA (assigner)3.1High7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
redhat-SADPADP (enrichment)3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVDNVD · Modified3.1High7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS (exploitation in 30 days)
4.3% · top 8.7% of all CVEs (13 Nov 2026)
CISA SSVC
Exploitation: poc · Automatable: no · Technical impact: total
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.1.

Affected products

  • Linux · Linux

    • affected bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 – < 93d4ba49d18e3d7fb41a9927c2d0cca5e9dfefd6
    • affected bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 – < 15b828a46f305ae9f05a7c16914b3ce273474205
    • affected bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 – < 4709234fd1b95136ceb789f639b1e7ea5de1b181
    • affected bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 – < 8f907d345bae8f4b3f004c5abc56bf2dfb851ea7
    • affected bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 – < 6e5b51e74a40d377bcd3081dd33fbaa0e1aa7e3d
    • affected bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 – < 2a93a4fac7b6051d3be7cd1b015fe7320cd0404d
    • affected bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 – < 01363cb3fbd0238ffdeb09f53e9039c9edf8a730
    • affected bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 – < 31e62c2ebbfdc3fe3dbdf5e02c92a9dc67087a3a
    • affected d5b3e840dbf6dd2c0f30b5982b6f5ecd49e46b12
    • affected 03eed7afbc09e061f66b448daf7863174c3dc3f3
    • affected e45692fa1aea06676449b63ef3c2b6e1e72b7578
    • affected 694a95fa6dae4991f16cda333d897ea063021fed
    • affected 3.16.52 – < 3.17
    • affected 4.4.40 – < 4.5
    • affected 4.8.16 – < 4.9
    • affected 4.9.1 – < 4.10

  • Linux · Linux

    • affected 4.10
    • unaffected < 4.10
    • unaffected 5.10.256 – ≤ 5.10.*
    • unaffected 5.15.207 – ≤ 5.15.*
    • unaffected 6.1.173 – ≤ 6.1.*
    • unaffected 6.6.139 – ≤ 6.6.*
    • unaffected 6.12.89 – ≤ 6.12.*
    • unaffected 6.18.31 – ≤ 6.18.*
    • unaffected 7.0.8 – ≤ 7.0.*
    • unaffected 7.1 – ≤ *

References

References42

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .