Tracker / CVE-2026-46333
CVE-2026-46333
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.
Prodotti e versioni affette
| debian | debian_linux |
|---|---|
| linux | linux_kernel |
| linux | linux_kernel · 3.16.52 → 3.17 |
| linux | linux_kernel · 4.4.40 → 4.5 |
| linux | linux_kernel · 4.8.16 → 4.9 |
| linux | linux_kernel · 4.9.1 → 5.10.256 |
| linux | linux_kernel · 5.11 → 5.15.207 |
| linux | linux_kernel · 5.16 → 6.1.173 |
| linux | linux_kernel · 6.13 → 6.18.31 |
| linux | linux_kernel · 6.19 → 7.0.8 |
| linux | linux_kernel · 6.2 → 6.6.139 |
| linux | linux_kernel · 6.7 → 6.12.89 |