CVE-2026-46333 (GCVE-0-2026-46333)

Vulnerability from cvelistv5 – Published: 2026-05-15 12:58 – Updated: 2026-05-16 12:20
VLAI?
Title
ptrace: slightly saner 'get_dumpable()' logic
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 93d4ba49d18e3d7fb41a9927c2d0cca5e9dfefd6 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 15b828a46f305ae9f05a7c16914b3ce273474205 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4709234fd1b95136ceb789f639b1e7ea5de1b181 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8f907d345bae8f4b3f004c5abc56bf2dfb851ea7 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6e5b51e74a40d377bcd3081dd33fbaa0e1aa7e3d (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 2a93a4fac7b6051d3be7cd1b015fe7320cd0404d (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 01363cb3fbd0238ffdeb09f53e9039c9edf8a730 (git)
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Linux Linux Unaffected: 5.10.256 , ≤ 5.10.* (semver)
Unaffected: 5.15.207 , ≤ 5.15.* (semver)
Unaffected: 6.1.173 , ≤ 6.1.* (semver)
Unaffected: 6.6.139 , ≤ 6.6.* (semver)
Unaffected: 6.12.89 , ≤ 6.12.* (semver)
Unaffected: 6.18.31 , ≤ 6.18.* (semver)
Unaffected: 7.0.8 , ≤ 7.0.* (semver)
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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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