CVE-2023-52910
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2023-52910
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-52910.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2023-52910
- Downstream
- Related
- Published
- 2024-08-21T06:10:51Z
- Modified
- 2025-10-08T17:50:02.609820Z
- Summary
- iommu/iova: Fix alloc iova overflows issue
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
iommu/iova: Fix alloc iova overflows issue
In _allocandinsertiovarange, there is an issue that retrypfn overflows. The value of iovad->anchor.pfnhi is ~0UL, then when iovad->cachednode is iovad->anchor, curriova->pfnhi + 1 will overflow. As a result, if the retry logic is executed, lowpfn is updated to 0, and then newpfn < low_pfn returns false to make the allocation successful.
This issue occurs in the following two situations: 1. The first iova size exceeds the domain size. When initializing iova domain, iovad->cachednode is assigned as iovad->anchor. For example, the iova domain size is 10M, startpfn is 0x1F0000000, and the iova size allocated for the first time is 11M. The following is the log information, new->pfnlo is smaller than iovad->cachednode.
Example log as follows: [ 223.798112][T1705487] sh: [name:iova&]allocandinsertiovarange startpfn:0x1f0000,retrypfn:0x0,size:0xb00,limitpfn:0x1f0a00 [ 223.799590][T1705487] sh: [name:iova&]allocandinsertiovarange success startpfn:0x1f0000,new->pfnlo:0x1efe00,new->pfnhi:0x1f08ff
- The node with the largest iova->pfnlo value in the iova domain is deleted, iovad->cachednode will be updated to iovad->anchor, and then the alloc iova size exceeds the maximum iova size that can be allocated in the domain.
After judging that retrypfn is less than limitpfn, call retry_pfn+1 to fix the overflow issue.
- 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
-
Introduced4e89dce725213d3d0b0475211b500eda4ef4bf2fFixedc929a230c84441e400c32e7b7b4ab763711fb63e
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced4e89dce725213d3d0b0475211b500eda4ef4bf2fFixed61cbf790e7329ed78877560be7136f0b911bba7f
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced4e89dce725213d3d0b0475211b500eda4ef4bf2fFixeddcdb3ba7e2a8caae7bfefd603bc22fd0ce9a389c