CVE-2025-21663

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2025-01-21. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.5Exploit: NoneExposed: 0

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

net: stmmac: dwmac-tegra: Read iommu stream id from device tree

Nvidia's Tegra MGBE controllers require the IOMMU "Stream ID" (SID) to be written to the MGBE_WRAP_AXI_ASID0_CTRL register.

The current driver is hard coded to use MGBE0's SID for all controllers. This causes softirq time outs and kernel panics when using controllers other than MGBE0.

Example dmesg errors when an ethernet cable is connected to MGBE1:

[ 116.133290] tegra-mgbe 6910000.ethernet eth1: Link is Up - 1Gbps/Full - flow control rx/tx [ 121.851283] tegra-mgbe 6910000.ethernet eth1: NETDEV WATCHDOG: CPU: 5: transmit queue 0 timed out 5690 ms [ 121.851782] tegra-mgbe 6910000.ethernet eth1: Reset adapter. [ 121.892464] tegra-mgbe 6910000.ethernet eth1: Register MEM_TYPE_PAGE_POOL RxQ-0 [ 121.905920] tegra-mgbe 6910000.ethernet eth1: PHY [stmmac-1:00] driver [Aquantia AQR113] (irq=171) [ 121.907356] tegra-mgbe 6910000.ethernet eth1: Enabling Safety Features [ 121.907578] tegra-mgbe 6910000.ethernet eth1: IEEE 1588-2008 Advanced Timestamp supported [ 121.908399] tegra-mgbe 6910000.ethernet eth1: registered PTP clock [ 121.908582] tegra-mgbe 6910000.ethernet eth1: configuring for phy/10gbase-r link mode [ 125.961292] tegra-mgbe 6910000.ethernet eth1: Link is Up - 1Gbps/Full - flow control rx/tx [ 181.921198] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 181.921404] rcu: 7-....: (1 GPs behind) idle=540c/1/0x4000000000000002 softirq=1748/1749 fqs=2337 [ 181.921684] rcu: (detected by 4, t=6002 jiffies, g=1357, q=1254 ncpus=8) [ 181.921878] Sending NMI from CPU 4 to CPUs 7: [ 181.921886] NMI backtrace for cpu 7 [ 181.922131] CPU: 7 UID: 0 PID: 0 Comm: swapper/7 Kdump: loaded Not tainted 6.13.0-rc3+ #6 [ 181.922390] Hardware name: NVIDIA CTI Forge + Orin AGX/Jetson, BIOS 202402.1-Unknown 10/28/2024 [ 181.922658] pstate: 40400009 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 181.922847] pc : handle_softirqs+0x98/0x368 [ 181.922978] lr : __do_softirq+0x18/0x20 [ 181.923095] sp : ffff80008003bf50 [ 181.923189] x29: ffff80008003bf50 x28: 0000000000000008 x27: 0000000000000000 [ 181.923379] x26: ffffce78ea277000 x25: 0000000000000000 x24: 0000001c61befda0 [ 181.924486] x23: 0000000060400009 x22: ffffce78e99918bc x21: ffff80008018bd70 [ 181.925568] x20: ffffce78e8bb00d8 x19: ffff80008018bc20 x18: 0000000000000000 [ 181.926655] x17: ffff318ebe7d3000 x16: ffff800080038000 x15: 0000000000000000 [ 181.931455] x14: ffff000080816680 x13: ffff318ebe7d3000 x12: 000000003464d91d [ 181.938628] x11: 0000000000000040 x10: ffff000080165a70 x9 : ffffce78e8bb0160 [ 181.945804] x8 : ffff8000827b3160 x7 : f9157b241586f343 x6 : eeb6502a01c81c74 [ 181.953068] x5 : a4acfcdd2e8096bb x4 : ffffce78ea277340 x3 : 00000000ffffd1e1 [ 181.960329] x2 : 0000000000000101 x1 : ffffce78ea277340 x0 : ffff318ebe7d3000 [ 181.967591] Call trace: [ 181.970043] handle_softirqs+0x98/0x368 (P) [ 181.974240] __do_softirq+0x18/0x20 [ 181.977743] ____do_softirq+0x14/0x28 [ 181.981415] call_on_irq_stack+0x24/0x30 [ 181.985180] do_softirq_own_stack+0x20/0x30 [ 181.989379] __irq_exit_rcu+0x114/0x140 [ 181.993142] irq_exit_rcu+0x14/0x28 [ 181.996816] el1_interrupt+0x44/0xb8 [ 182.000316] el1h_64_irq_handler+0x14/0x20 [ 182.004343] el1h_64_irq+0x80/0x88 [ 182.007755] cpuidle_enter_state+0xc4/0x4a8 (P) [ 182.012305] cpuidle_enter+0x3c/0x58 [ 182.015980] cpuidle_idle_call+0x128/0x1c0 [ 182.020005] do_idle+0xe0/0xf0 [ 182.023155] cpu_startup_entry+0x3c/0x48 [ 182.026917] secondary_start_kernel+0xdc/0x120 [ 182.031379] __secondary_switched+0x74/0x78 [ 212.971162] rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 7-.... } 6103 jiffies s: 417 root: 0x80/. [ 212.985935] rcu: blocking rcu_node structures (internal RCU debug): [ 212.992758] Sending NMI from CPU 0 to CPUs 7: [ 212.998539] NMI backtrace for cpu 7 [ 213.004304] CPU: 7 UID: 0 PI ---truncated---

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity55% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
9.9%
KEV
Not listed

Published

January 21, 2025

Last Modified

October 15, 2025

References (3)

Vendor Advisories for CVE-2025-21663(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(17)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-24.04-edge (6.11.0-21.21) @ oracular2026-05-30ubuntu
ubuntulinux-tools-lowlatency-hwe-24.04-edge (6.11.0-1011.12~24.04.1) @ noble2026-05-30ubuntu
ubuntulinux-tools-raspi (6.11.0-1010.10) @ oracular2026-05-30ubuntu
ubuntulinux-tools-lowlatency-64k (6.11.0-1011.12) @ oracular2026-05-30ubuntu
ubuntulinux-tools-oem-24.04b (6.11.0-1017.17) @ noble2026-05-30ubuntu
ubuntulinux-virtual (6.8.0-60.63) @ noble2026-05-30ubuntu
ubuntulinux-tools-realtime (6.8.1-1022.23) @ noble2026-05-30ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k (6.8.0-1028.31.1) @ noble2026-05-30ubuntu
ubuntulinux-tools-oem-24.04a (6.8.0-1028.28) @ noble2026-05-30ubuntu
ubuntulinux-tools-gke (6.8.0-1025.29) @ noble2026-05-30ubuntu
ubuntulinux-tools-azure-nvidia (6.8.0-1016.17) @ noble2026-05-30ubuntu
ubuntulinux-tools-gkeop-6.8 (6.8.0-1012.14) @ noble2026-05-30ubuntu
ubuntulinux-tools-raspi-realtime (6.8.0-2023.24) @ noble2026-05-30ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-60.63~22.04.1) @ jammy2026-05-30ubuntu
ubuntulinux-tools-raspi (6.8.0-1028.32) @ noble2026-05-30ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1026.27~22.04.1) @ jammy2026-05-30ubuntu
redhatkernel-0:5.14.0-570.12.1.el9_62025-05-13redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Additional Vendor Advisories

(16)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 11× in last 7d / 46× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-23 14:17 UTCEPSS rescore
  2. 2026-07-23 02:50 UTCEG score recompute
  3. 2026-07-22 14:07 UTCEPSS rescore
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  1. 2026-07-07 13:45 UTCEPSS rescore
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  32. 2026-06-19 00:05 UTCOSV refresh
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  66. 2026-05-30 13:01 UTCVendor advisory
  67. 2026-05-30 13:01 UTCGHSA enrichment
  68. 2026-05-29 17:20 UTCOSV refresh
  69. 2026-05-29 13:44 UTCEPSS rescore

Frequently asked(5)

What is CVE-2025-21663?
CVE-2025-21663 is a medium vulnerability published on January 21, 2025. In the Linux kernel, the following vulnerability has been resolved: net: stmmac: dwmac-tegra: Read iommu stream id from device tree Nvidia's Tegra MGBE controllers require the IOMMU "Stream ID" (SID) to be written to the MGBEWRAPAXIASID0CTRL register. The current driver is hard coded to use MGBE0's…
When was CVE-2025-21663 disclosed?
CVE-2025-21663 was first published in the National Vulnerability Database on January 21, 2025, with the most recent update on October 15, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-21663 actively exploited?
CVE-2025-21663 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 9.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-21663?
CVE-2025-21663 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2025-21663?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-21663, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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