CVE-2025-38569 Information

Aug 20, 2025 cve

Description

In the Linux kernel the following vulnerability has been resolved:

benet: fix BUG when creating VFs

benet crashes as soon as SRIOV VFs are created:

kernel BUG at mm/vmalloc.c:3457! Oops: invalid opcode: 0000 [1] SMP KASAN NOPTI CPU: 4 UID: 0 PID: 7408 Comm: test.sh Kdump: loaded Not tainted 6.16.0+ 1 PREEMPT(voluntary) […] RIP: 0010:vunmap+0x5f/0x70 […] Call Trace: __iommu_dma_free+0xe8/0x1c0 be_cmd_set_mac_list+0x3fe/0x640 [be2net] be_cmd_set_mac+0xaf/0x110 [be2net] be_vf_eth_addr_config+0x19f/0x330 [be2net] be_vf_setup+0x4f7/0x990 [be2net] be_pci_sriov_configure+0x3a1/0x470 [be2net] sriov_numvfs_store+0x20b/0x380 kernfs_fop_write_iter+0x354/0x530 vfs_write+0x9b9/0xf60 ksys_write+0xf3/0x1d0 do_syscall_64+0x8c/0x3d0

be_cmd_set_mac_list() calls dma_free_coherent() under a spin_lock_bh. Fix it by freeing only after the lock has been released.

Reference

https://git.kernel.org/stable/c/0ddfe8b127ef1149fddccb79db6e6eaba7738e7d https://git.kernel.org/stable/c/46d44a23a3723a89deeb65b13cddb17f8d9f2700 https://git.kernel.org/stable/c/5a40f8af2ba1b9bdf46e2db10e8c9710538fbc63 https://git.kernel.org/stable/c/c377ba2be9430d165a98e4b782902ed630bc7546 https://git.kernel.org/stable/c/d5dc09ee5d74277bc47193fe28ce8703e229331b https://git.kernel.org/stable/c/f4e4e0c4bc4d799d6fa39055acdbc3af066cd13e

CNNVD-202508-2135 (Published: 2025-08-19)

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