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CVE PROGRAM SOURCE RECORD7.1 High

CVE-2026-46333

ptrace: slightly saner 'get_dumpable()' logic

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Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 to < 93d4ba49d18e3d7fb41a9927c2d0cca5e9dfefd6affected
  • bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 to < 15b828a46f305ae9f05a7c16914b3ce273474205affected
  • bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 to < 4709234fd1b95136ceb789f639b1e7ea5de1b181affected
  • bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 to < 8f907d345bae8f4b3f004c5abc56bf2dfb851ea7affected
  • bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 to < 6e5b51e74a40d377bcd3081dd33fbaa0e1aa7e3daffected
  • bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 to < 2a93a4fac7b6051d3be7cd1b015fe7320cd0404daffected
  • bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 to < 01363cb3fbd0238ffdeb09f53e9039c9edf8a730affected
  • bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 to < 31e62c2ebbfdc3fe3dbdf5e02c92a9dc67087a3aaffected
  • d5b3e840dbf6dd2c0f30b5982b6f5ecd49e46b12affected
  • 03eed7afbc09e061f66b448daf7863174c3dc3f3affected
  • e45692fa1aea06676449b63ef3c2b6e1e72b7578affected
  • 694a95fa6dae4991f16cda333d897ea063021fedaffected
  • 3.16.52 to < 3.17affected
  • 4.4.40 to < 4.5affected
  • 4.8.16 to < 4.9affected
  • 4.9.1 to < 4.10affected

Linux Linux

Default version status: affected

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

References