| Summary: |
VUL-0: CVE-2024-27007: kernel: userfaultfd: change src_folio after ensuring it's unpinned in UFFDIO_MOVE |
| Product: |
[Novell Products] SUSE Security Incidents
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Reporter: |
SMASH SMASH <smash_bz> |
| Component: |
Incidents | Assignee: |
Security Team bot <security-team> |
| Status: |
RESOLVED
FIXED
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QA Contact: |
Security Team bot <security-team> |
| Severity: |
Normal
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| Priority: |
P3 - Medium
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CC: |
carlos.lopez, vasant.karasulli
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| Version: |
unspecified | |
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| Target Milestone: |
--- | |
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| Hardware: |
Other | |
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| OS: |
Other | |
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| URL: |
https://smash.suse.de/issue/403775/
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| Whiteboard: |
CVSSv3.1:SUSE:CVE-2024-27007:5.5:(AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H) |
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Found By:
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Security Response Team
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Services Priority:
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Business Priority:
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Blocker:
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---
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Marketing QA Status:
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---
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IT Deployment:
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In the Linux kernel, the following vulnerability has been resolved: userfaultfd: change src_folio after ensuring it's unpinned in UFFDIO_MOVE Commit d7a08838ab74 ("mm: userfaultfd: fix unexpected change to src_folio when UFFDIO_MOVE fails") moved the src_folio->{mapping, index} changing to after clearing the page-table and ensuring that it's not pinned. This avoids failure of swapout+migration and possibly memory corruption. However, the commit missed fixing it in the huge-page case. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-27007 https://www.cve.org/CVERecord?id=CVE-2024-27007 https://git.kernel.org/stable/c/c0205eaf3af9f5db14d4b5ee4abacf4a583c3c50 https://git.kernel.org/stable/c/df5f6e683e7f21a15d8be6e7a0c7a46436963ebe https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-27007.mbox https://bugzilla.redhat.com/show_bug.cgi?id=2278285