CVE-2026-46333 (GCVE-0-2026-46333)
Vulnerability from cvelistv5
Published
2026-05-15 12:58
Modified
2026-05-23 16:07
Severity ?
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: bfedb589252c01fa505ac9f6f2a3d5d68d707ef4
Version: bfedb589252c01fa505ac9f6f2a3d5d68d707ef4
Version: bfedb589252c01fa505ac9f6f2a3d5d68d707ef4
Version: bfedb589252c01fa505ac9f6f2a3d5d68d707ef4
Version: bfedb589252c01fa505ac9f6f2a3d5d68d707ef4
Version: bfedb589252c01fa505ac9f6f2a3d5d68d707ef4
Version: bfedb589252c01fa505ac9f6f2a3d5d68d707ef4
Version: bfedb589252c01fa505ac9f6f2a3d5d68d707ef4
Version: d5b3e840dbf6dd2c0f30b5982b6f5ecd49e46b12
Version: 03eed7afbc09e061f66b448daf7863174c3dc3f3
Version: e45692fa1aea06676449b63ef3c2b6e1e72b7578
Version: 694a95fa6dae4991f16cda333d897ea063021fed
Version: 3.16.52   ≤
Version: 4.4.40   ≤
Version: 4.8.16   ≤
Version: 4.9.1   ≤
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    "datePublished": "2026-05-15T12:58:44.599Z",
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    "dateUpdated": "2026-05-23T16:07:12.401Z",
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