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CVE-2026-80963

dm-stats: fix a crash if allocation of per-cpu data fails

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.109, and 2 more
None on Exploit-DB, Metasploit or GitHub

Summary

In the Linux kernel, the following vulnerability has been resolved: dm-stats: fix a crash if allocation of per-cpu data fails If "dm_kvzalloc(percpu_alloc_size, cpu_to_node(cpu))" fails, the code jumps to the "out" label and calls dm_stat_free. dm_stat_free does "for_each_possible_cpu(cpu) { dm_kvfree(s->stat_percpu[cpu][0].histogram, s->histogram_alloc_size);", which crashes with NULL pointer dereference if s->stat_percpu[cpu] is NULL. This commit fixes the bug by testing s->stat_percpu[cpu] for NULL before using it.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From fd2ed4d252701d3bbed4cd3e3d267ad469bb832a · fixed in e45f0b0c41139810ff395ba2f3cfca1460a5b8a6; From fd2ed4d252701d3bbed4cd3e3d267ad469bb832a · fixed in 9805d87d0e26c68ee69da3928e665214d2e2851a; From fd2ed4d252701d3bbed4cd3e3d267ad469bb832a · fixed in 564d17573ef643c13cf6e9015124a205fa65e704; From fd2ed4d252701d3bbed4cd3e3d267ad469bb832a · fixed in 389a50d094e13724f5f45e6d9d6ef734c98ba291; From fd2ed4d252701d3bbed4cd3e3d267ad469bb832a · fixed in c3f211b7a277dd404b4e7d23095be964b5b46a27; From fd2ed4d252701d3bbed4cd3e3d267ad469bb832a · fixed in 74210fa072960a18bb0eead487585452af722e4f; From fd2ed4d252701d3bbed4cd3e3d267ad469bb832a · fixed in 0c8f7870ed3ebd512f090d7714cc2c556b9e5c75; From fd2ed4d252701d3bbed4cd3e3d267ad469bb832a · fixed in cc87e26d9cce22061dc21e51e11afef29dbbc36a

  • Linux Linux

    3.12

  • KernelLinux

    From 3.12.0 · fixed in 5.10.270; From 5.11.0 · fixed in 5.15.221; From 5.16.0 · fixed in 6.1.188; From 6.2.0 · fixed in 6.6.157; From 6.7.0 · fixed in 6.12.109; From 6.13.0 · fixed in 6.18.50; From 6.19.0 · fixed in 7.2.4

References 8

git.kernel.org