CVE-2024-26786
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-26786
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-26786.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2024-26786
- Downstream
- Related
- Published
- 2024-04-04T08:20:19Z
- Modified
- 2025-10-09T05:13:31.620220Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- iommufd: Fix iopt_access_list_id overwrite bug
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
iommufd: Fix ioptaccesslist_id overwrite bug
Syzkaller reported the following WARNON: WARNING: CPU: 1 PID: 4738 at drivers/iommu/iommufd/iopagetable.c:1360
Call Trace: iommufdaccesschangeioas+0x2fe/0x4e0 iommufdaccessdestroyobject+0x50/0xb0 iommufdobjectremove+0x2a3/0x490 iommufdobjectdestroyuser iommufdaccessdestroy+0x71/0xb0 iommufdteststaccessrelease+0x89/0xd0 _fput+0x272/0xb50 _fputsync+0x4b/0x60 _dosysclose _sesysclose _x64sysclose+0x8b/0x110 dosyscallx64
The mismatch between the access pointer in the list and the passed-in pointer is resulting from an overwrite of access->ioptaccesslistid, in ioptaddaccess(). Called from iommufdaccesschangeioas() when xaalloc() succeeds but ioptcalculateiovaalignment() fails.
Add a newid in ioptaddaccess() and only update ioptaccesslistid when returning successfully.
- References
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced9227da7816dd1a42e20d41e2244cb63c205477caFixedf1fb745ee0a6fe43f1d84ec369c7e6af2310fda9
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced9227da7816dd1a42e20d41e2244cb63c205477caFixed9526a46cc0c378d381560279bea9aa34c84298a0
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced9227da7816dd1a42e20d41e2244cb63c205477caFixedaeb004c0cd6958e910123a1607634401009c9539