References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to nvd@nist.gov.

Change History

https://git.kernel.org/stable/c/74b3d66f91d9f539f99faad74d796fa9a389a015

https://git.kernel.org/stable/c/c70dce4982ce1718bf978a35f8e26160b82081f4

In the Linux kernel, the following vulnerability has been resolved:

fs/proc/task_mmu: fix loss of young/dirty bits during pagemap scan

make_uffd_wp_pte() was previously doing:

  pte = ptep_get(ptep);
  ptep_modify_prot_start(ptep);
  pte = pte_mkuffd_wp(pte);
  ptep_modify_prot_commit(ptep, pte);

But if another thread accessed or dirtied the pte between the first 2
calls, this could lead to loss of that information.  Since
ptep_modify_prot_start() gets and clears atomically, the following is

kernel.org https://git.kernel.org/stable/c/74b3d66f91d9f539f99faad74d796fa9a389a015 [No types assigned]

kernel.org https://git.kernel.org/stable/c/c70dce4982ce1718bf978a35f8e26160b82081f4 [No types assigned]