| Summary: |
VUL-0: CVE-2024-27066: kernel: virtio: packed: fix unmap leak for indirect desc table |
| Product: |
[Novell Products] SUSE Security Incidents
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Reporter: |
SMASH SMASH <smash_bz> |
| Component: |
Incidents | Assignee: |
Kernel Bugs <kernel-bugs> |
| Status: |
RESOLVED
FIXED
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QA Contact: |
Security Team bot <security-team> |
| Severity: |
Normal
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| Priority: |
P5 - None
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CC: |
gianluca.gabrielli
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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/403857/
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| Whiteboard: |
CVSSv3.1:SUSE:CVE-2024-27066:5.5:(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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IT Deployment:
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In the Linux kernel, the following vulnerability has been resolved: virtio: packed: fix unmap leak for indirect desc table When use_dma_api and premapped are true, then the do_unmap is false. Because the do_unmap is false, vring_unmap_extra_packed is not called by detach_buf_packed. if (unlikely(vq->do_unmap)) { curr = id; for (i = 0; i < state->num; i++) { vring_unmap_extra_packed(vq, &vq->packed.desc_extra[curr]); curr = vq->packed.desc_extra[curr].next; } } So the indirect desc table is not unmapped. This causes the unmap leak. So here, we check vq->use_dma_api instead. Synchronously, dma info is updated based on use_dma_api judgment This bug does not occur, because no driver use the premapped with indirect. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-27066 https://www.cve.org/CVERecord?id=CVE-2024-27066 https://git.kernel.org/stable/c/51bacd9d29bf98c3ebc65e4a0477bb86306b4140 https://git.kernel.org/stable/c/75450ff8c6fe8755bf5b139b238eaf9739cfd64e https://git.kernel.org/stable/c/d5c0ed17fea60cca9bc3bf1278b49ba79242bbcd https://git.kernel.org/stable/c/e142169aca5546ae6619c39a575cda8105362100 https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-27066.mbox https://bugzilla.redhat.com/show_bug.cgi?id=2278378