CVE-2022-50058
vdpa_sim_blk: set number of address spaces and virtqueue groups
Reported by linux · Published June 18, 2025
In the Linux kernel, the following vulnerability has been resolved: vdpa_sim_blk: set number of address spaces and virtqueue groups Commit bda324fd037a ("vdpasim: control virtqueue support") added two new fields (nas, ngroups) to vdpasim_dev_attr, but we forgot to initialize them for vdpa_sim_blk. When creating a new vdpa_sim_blk device this causes the kernel to panic in this way: $ vdpa dev add mgmtdev vdpasim_blk name blk0 BUG: kernel NULL pointer dereference, address: 0000000000000030 ... RIP: 0010:vhost_iotlb_add_range_ctx+0x41/0x220 [vhost_iotlb] ... Call Trace: <TASK> vhost_iotlb_add_range+0x11/0x800 [vhost_iotlb] vdpasim_map_range+0x91/0xd0 [vdpa_sim] vdpasim_alloc_coherent+0x56/0x90 [vdpa_sim] ... This happens because vdpasim->iommu[0] is not initialized when dev_attr.nas is 0. Let's fix this issue by initializing both (nas, ngroups) to 1 for vdpa_sim_blk.
EPSS 0.16% · 5.5th percentile
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | bda324fd037a6b0d44da5699574ce741ca161bc4, bda324fd037a6b0d44da5699574ce741ca161bc4 |
| Linux | Linux | 5.19, 0, 5.19.4 |
| linux | linux_kernel | 5.19, 5.19 |
| Linux | Linux | *, *, 5.19 |
Timeline
- Jun 18, 2025 CVE Published
- Jun 29, 2025 EPSS Score (29 in total, the first dated here)
- May 23, 2026 Coalition ESS Score
- Jun 2, 2026 Security Advisory (239 in total, the first dated here)
- Oct 13, 2026 CVE Updated
- Oct 18, 2026 Distribution Patch (228 in total, the first dated here)
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