CVE-2026-23386
- Source
- https://cve.org/CVERecord?id=CVE-2026-23386
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-23386.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-23386
- Downstream
- Related
- Published
- 2026-03-25T10:28:04Z
- Modified
- 2026-08-12T03:30:26Z
- Summary
- gve: fix incorrect buffer cleanup in gve_tx_clean_pending_packets for QPL
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
gve: fix incorrect buffer cleanup in gve_tx_clean_pending_packets for QPL
In DQ-QPL mode, gve_tx_clean_pending_packets() incorrectly uses the RDA buffer cleanup path. It iterates num_bufs times and attempts to unmap entries in the dma array.
This leads to two issues:
- The dma array shares storage with tx_qpl_buf_ids (union). Interpreting buffer IDs as DMA addresses results in attempting to unmap incorrect memory locations.
- num_bufs in QPL mode (counting 2K chunks) can significantly exceed the size of the dma array, causing out-of-bounds access warnings (trace below is how we noticed this issue).
UBSAN: array-index-out-of-bounds in drivers/net/ethernet/drivers/net/ethernet/google/gve/gve_tx_dqo.c:178:5 index 18 is out of range for type 'dma_addr_t[18]' (aka 'unsigned long long[18]') Workqueue: gve gve_service_task [gve] Call Trace: dump_stack_lvl+0x33/0xa0 __ubsan_handle_out_of_bounds+0xdc/0x110 gve_tx_stop_ring_dqo+0x182/0x200 [gve] gve_close+0x1be/0x450 [gve] gve_reset+0x99/0x120 [gve] gve_service_task+0x61/0x100 [gve] process_scheduled_works+0x1e9/0x380
Fix this by properly checking for QPL mode and delegating to gve_free_tx_qpl_bufs() to reclaim the buffers.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23386.json" }- References
-
- https://git.kernel.org/stable/c/07e0c80e17ef781799e7cd5c41a7bf44f1bf6a5f
- https://git.kernel.org/stable/c/3744ebd8ffaa542ae8110fb449adcac0202f4cc8
- https://git.kernel.org/stable/c/71511dae56a75ce161aa746741e5c498feaea393
- https://git.kernel.org/stable/c/c171f90f58974c784db25e0606051541cb71b7f0
- https://git.kernel.org/stable/c/fb868db5f4bccd7a78219313ab2917429f715cea
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23386.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-23386
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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
-
Introduceda6fb8d5a8b6925f1e635818d3dd2d89531d4a058Fixed71511dae56a75ce161aa746741e5c498feaea393Fixedc171f90f58974c784db25e0606051541cb71b7f0Fixed07e0c80e17ef781799e7cd5c41a7bf44f1bf6a5fFixed3744ebd8ffaa542ae8110fb449adcac0202f4cc8Fixedfb868db5f4bccd7a78219313ab2917429f715cea