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

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ptrace的get_dumpable逻辑处理不当，可能导致权限检查问题。

CVSS 7.1 · High EPSS 0.51% · P41

Public Exploits 1

Metasploit · 1 cve_2026_46333_chage.rb [post]

Possible ATT&CK Techniques 1 AI

T1055.011 · Extra Window Memory Injection

Affected Version Matrix 26

VendorProduct Version RangeStatus
Linux Linux bfedb589252c01fa505ac9f6f2a3d5d68d707ef4< 93d4ba49d18e3d7fb41a9927c2d0cca5e9dfefd6 affected
bfedb589252c01fa505ac9f6f2a3d5d68d707ef4< 15b828a46f305ae9f05a7c16914b3ce273474205 affected
bfedb589252c01fa505ac9f6f2a3d5d68d707ef4< 4709234fd1b95136ceb789f639b1e7ea5de1b181 affected
bfedb589252c01fa505ac9f6f2a3d5d68d707ef4< 8f907d345bae8f4b3f004c5abc56bf2dfb851ea7 affected
bfedb589252c01fa505ac9f6f2a3d5d68d707ef4< 6e5b51e74a40d377bcd3081dd33fbaa0e1aa7e3d affected
bfedb589252c01fa505ac9f6f2a3d5d68d707ef4< 2a93a4fac7b6051d3be7cd1b015fe7320cd0404d affected
bfedb589252c01fa505ac9f6f2a3d5d68d707ef4< 01363cb3fbd0238ffdeb09f53e9039c9edf8a730 affected
bfedb589252c01fa505ac9f6f2a3d5d68d707ef4< 31e62c2ebbfdc3fe3dbdf5e02c92a9dc67087a3a affected
… +18 more rows
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I. Basic Information for CVE-2026-46333

Vulnerability Information
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Vulnerability Title
ptrace: slightly saner 'get_dumpable()' logic
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ptrace的get_dumpable逻辑处理不当，可能导致权限检查问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 ~ 93d4ba49d18e3d7fb41a9927c2d0cca5e9dfefd6 -
Linux Linux 4.10 -

II. Public POCs for CVE-2026-46333

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III. Intelligence Information for CVE-2026-46333

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Patches & Fixes for CVE-2026-46333 (8)

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46333

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