CVE-2024-41032: mm: vmalloc: check if a hash-index is in cpu_possible_mask
First published: Mon Jul 29 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: mm: vmalloc: check if a hash-index is in cpu_possible_mask The problem is that there are systems where cpu_possible_mask has gaps between set CPUs, for example SPARC. In this scenario addr_to_vb_xa() hash function can return an index which accesses to not-possible and not setup CPU area using per_cpu() macro. This results in an oops on SPARC. A per-cpu vmap_block_queue is also used as hash table, incorrectly assuming the cpu_possible_mask has no gaps. Fix it by adjusting an index to a next possible CPU.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <6.6.41 | 6.6.41 |
| redhat/kernel | <6.9.10 | 6.9.10 |
| redhat/kernel | <6.10 | 6.10 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.112-1 6.11.7-1 6.11.9-1 |
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Reference Links
- https://git.kernel.org/stable/c/28acd531c9a365dac01b32e6bc54aed8c1429bcb
- https://git.kernel.org/stable/c/47f9b6e49b422392fb0e348a65eb925103ba1882
- https://git.kernel.org/stable/c/a34acf30b19bc4ee3ba2f1082756ea2604c19138
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-41032
- https://nvd.nist.gov/vuln/detail/CVE-2024-41032
- https://launchpad.net/bugs/cve/CVE-2024-41032
- https://security-tracker.debian.org/tracker/CVE-2024-41032
- https://ubuntu.com/security/CVE-2024-41032
- https://git.kernel.org/linus/a34acf30b19bc4ee3ba2f1082756ea2604c19138
- https://lore.kernel.org/linux-cve-announce/2024072922-CVE-2024-41032-6284@gregkh/T
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2301533
- https://access.redhat.com/errata/RHSA-2024:9315
- https://bugzilla.redhat.com/show_bug.cgi?id=2300398
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