--- id: CVE-2025-37833 title: 'net/niu: Niu requires MSIX ENTRY_DATA fields touch before entry reads' summary: |- In the Linux kernel, the following vulnerability has been resolved: net/niu: Niu requires MSIX ENTRY_DATA fields touch before entry reads Fix niu_try_msix() to not cause a fatal trap on sparc systems. Set PCI_DEV_FLAGS_MSIX_TOUCH_ENTR… severity: none vendor: Linux product: Linux affected: - >- Linux >= 7d5ec3d3612396dc6d4b76366d20ab9fc06f399f < 52a266008a9450e4222994666b4510c026fbb03c - >- Linux >= 7d5ec3d3612396dc6d4b76366d20ab9fc06f399f < 0afd48b173bebd6d94769ba2c91bd7404b9eb3c9 - >- Linux >= 7d5ec3d3612396dc6d4b76366d20ab9fc06f399f < c187aaa9e79b4b6d86ac7ba941e579ad33df5538 - >- Linux >= 7d5ec3d3612396dc6d4b76366d20ab9fc06f399f < 64903e4849a71cf7f7c7e5d45225ccefc1280929 - >- Linux >= 7d5ec3d3612396dc6d4b76366d20ab9fc06f399f < fbb429ddff5c8e479edcc7dde5a542c9295944e6 - Linux e6454fd429b0ba6513ac1de27a0bd6ccac021a40 - Linux 3590d16b47ac561a4f2504befe43def10ed1814c - Linux e1d5e8a561baaafed6e35d72a6ad53d248580d6c - Linux 3b570884c868c12e3184627ce4b4a167e9d6f018 - Linux 1866c8f6d43c3c6ffa2bfe086b65392b3a3fafb1 - Linux aa8092c1d1f142f797995d0448afb73a5148f4ae - Linux 6c971252f09040af40d20851cf4e14018e6710d9 - Linux >= 4.4.282 < 4.5 - Linux >= 4.9.281 < 4.10 - Linux >= 4.14.245 < 4.15 - Linux >= 4.19.205 < 4.20 - Linux >= 5.4.142 < 5.5 - Linux >= 5.10.60 < 5.11 - Linux >= 5.13.12 < 5.14 - Linux 5.14 published: '2025-05-08' updated: '2026-09-14' sourceUpdated: '2026-09-14T11:58:00.073Z' source: CVEORG sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-37833' references: - url: 'https://git.kernel.org/stable/c/52a266008a9450e4222994666b4510c026fbb03c' - url: 'https://git.kernel.org/stable/c/0afd48b173bebd6d94769ba2c91bd7404b9eb3c9' - url: 'https://git.kernel.org/stable/c/c187aaa9e79b4b6d86ac7ba941e579ad33df5538' - url: 'https://git.kernel.org/stable/c/64903e4849a71cf7f7c7e5d45225ccefc1280929' - url: 'https://git.kernel.org/stable/c/fbb429ddff5c8e479edcc7dde5a542c9295944e6' tags: - cve.org epss: 0.00181 epssPercentile: 0.06801 ingestedAt: '2026-09-14T15:23:07.459Z' --- ## Overview In the Linux kernel, the following vulnerability has been resolved: net/niu: Niu requires MSIX ENTRY_DATA fields touch before entry reads Fix niu_try_msix() to not cause a fatal trap on sparc systems. Set PCI_DEV_FLAGS_MSIX_TOUCH_ENTRY_DATA_FIRST on the struct pci_dev to work around a bug in the hardware or firmware. For each vector entry in the msix table, niu chips will cause a fatal trap if any registers in that entry are read before that entries' ENTRY_DATA register is written to. Testing indicates writes to other registers are not sufficient to prevent the fatal trap, however the value does not appear to matter. This only needs to happen once after power up, so simply rebooting into a kernel lacking this fix will NOT cause the trap. NON-RESUMABLE ERROR: Reporting on cpu 64 NON-RESUMABLE ERROR: TPC [0x00000000005f6900] NON-RESUMABLE ERROR: RAW [4010000000000016:00000e37f93e32ff:0000000202000080:ffffffffffffffff NON-RESUMABLE ERROR: 0000000800000000:0000000000000000:0000000000000000:0000000000000000] NON-RESUMABLE ERROR: handle [0x4010000000000016] stick [0x00000e37f93e32ff] NON-RESUMABLE ERROR: type [precise nonresumable] NON-RESUMABLE ERROR: attrs [0x02000080] < ASI sp-faulted priv > NON-RESUMABLE ERROR: raddr [0xffffffffffffffff] NON-RESUMABLE ERROR: insn effective address [0x000000c50020000c] NON-RESUMABLE ERROR: size [0x8] NON-RESUMABLE ERROR: asi [0x00] CPU: 64 UID: 0 PID: 745 Comm: kworker/64:1 Not tainted 6.11.5 #63 Workqueue: events work_for_cpu_fn TSTATE: 0000000011001602 TPC: 00000000005f6900 TNPC: 00000000005f6904 Y: 00000000 Not tainted TPC: g0: 00000000000002e9 g1: 000000000000000c g2: 000000c50020000c g3: 0000000000000100 g4: ffff8000470307c0 g5: ffff800fec5be000 g6: ffff800047a08000 g7: 0000000000000000 o0: ffff800014feb000 o1: ffff800047a0b620 o2: 0000000000000011 o3: ffff800047a0b620 o4: 0000000000000080 o5: 0000000000000011 sp: ffff800047a0ad51 ret_pc: 00000000005f7128 RPC: <__pci_enable_msix_range+0x3cc/0x460> l0: 000000000000000d l1: 000000000000c01f l2: ffff800014feb0a8 l3: 0000000000000020 l4: 000000000000c000 l5: 0000000000000001 l6: 0000000020000000 l7: ffff800047a0b734 i0: ffff800014feb000 i1: ffff800047a0b730 i2: 0000000000000001 i3: 000000000000000d i4: 0000000000000000 i5: 0000000000000000 i6: ffff800047a0ae81 i7: 00000000101888b0 I7: Call Trace: [<00000000101888b0>] niu_try_msix.constprop.0+0xc0/0x130 [niu] [<000000001018f840>] niu_get_invariants+0x183c/0x207c [niu] [<00000000101902fc>] niu_pci_init_one+0x27c/0x2fc [niu] [<00000000005ef3e4>] local_pci_probe+0x28/0x74 [<0000000000469240>] work_for_cpu_fn+0x8/0x1c [<000000000046b008>] process_scheduled_works+0x144/0x210 [<000000000046b518>] worker_thread+0x13c/0x1c0 [<00000000004710e0>] kthread+0xb8/0xc8 [<00000000004060c8>] ret_from_fork+0x1c/0x2c [<0000000000000000>] 0x0 Kernel panic - not syncing: Non-resumable error. ## Affected - `Linux >= 7d5ec3d3612396dc6d4b76366d20ab9fc06f399f < 52a266008a9450e4222994666b4510c026fbb03c` - `Linux >= 7d5ec3d3612396dc6d4b76366d20ab9fc06f399f < 0afd48b173bebd6d94769ba2c91bd7404b9eb3c9` - `Linux >= 7d5ec3d3612396dc6d4b76366d20ab9fc06f399f < c187aaa9e79b4b6d86ac7ba941e579ad33df5538` - `Linux >= 7d5ec3d3612396dc6d4b76366d20ab9fc06f399f < 64903e4849a71cf7f7c7e5d45225ccefc1280929` - `Linux >= 7d5ec3d3612396dc6d4b76366d20ab9fc06f399f < fbb429ddff5c8e479edcc7dde5a542c9295944e6` - `Linux e6454fd429b0ba6513ac1de27a0bd6ccac021a40` - `Linux 3590d16b47ac561a4f2504befe43def10ed1814c` - `Linux e1d5e8a561baaafed6e35d72a6ad53d248580d6c` - `Linux 3b570884c868c12e3184627ce4b4a167e9d6f018` - `Linux 1866c8f6d43c3c6ffa2bfe086b65392b3a3fafb1` - `Linux aa8092c1d1f142f797995d0448afb73a5148f4ae` - `Linux 6c971252f09040af40d20851cf4e14018e6710d9` - `Linux >= 4.4.282 < 4.5` - `Linux >= 4.9.281 < 4.10` - `Linux >= 4.14.245 < 4.15` - `Linux >= 4.19.205 < 4.20` - `Linux >= 5.4.142 < 5.5` - `Linux >= 5.10.60 < 5.11` - `Linux >= 5.13.12 < 5.14` - `Linux 5.14` ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges.