CVE-2025-21708

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2025-02-27. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

A fix is available — apply it.

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

net: usb: rtl8150: enable basic endpoint checking

Syzkaller reports [1] encountering a common issue of utilizing a wrong usb endpoint type during URB submitting stage. This, in turn, triggers a warning shown below.

For now, enable simple endpoint checking (specifically, bulk and interrupt eps, testing control one is not essential) to mitigate the issue with a view to do other related cosmetic changes later, if they are necessary.

[1] Syzkaller report: usb 1-1: BOGUS urb xfer, pipe 3 != type 1 WARNING: CPU: 1 PID: 2586 at drivers/usb/core/urb.c:503 usb_submit_urb+0xe4b/0x1730 driv> Modules linked in: CPU: 1 UID: 0 PID: 2586 Comm: dhcpcd Not tainted 6.11.0-rc4-syzkaller-00069-gfc88bb11617> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:usb_submit_urb+0xe4b/0x1730 drivers/usb/core/urb.c:503 Code: 84 3c 02 00 00 e8 05 e4 fc fc 4c 89 ef e8 fd 25 d7 fe 45 89 e0 89 e9 4c 89 f2 48 8> RSP: 0018:ffffc9000441f740 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff888112487a00 RCX: ffffffff811a99a9 RDX: ffff88810df6ba80 RSI: ffffffff811a99b6 RDI: 0000000000000001 RBP: 0000000000000003 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001 R13: ffff8881023bf0a8 R14: ffff888112452a20 R15: ffff888112487a7c FS: 00007fc04eea5740(0000) GS:ffff8881f6300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0a1de9f870 CR3: 000000010dbd0000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rtl8150_open+0x300/0xe30 drivers/net/usb/rtl8150.c:733 __dev_open+0x2d4/0x4e0 net/core/dev.c:1474 __dev_change_flags+0x561/0x720 net/core/dev.c:8838 dev_change_flags+0x8f/0x160 net/core/dev.c:8910 devinet_ioctl+0x127a/0x1f10 net/ipv4/devinet.c:1177 inet_ioctl+0x3aa/0x3f0 net/ipv4/af_inet.c:1003 sock_do_ioctl+0x116/0x280 net/socket.c:1222 sock_ioctl+0x22e/0x6c0 net/socket.c:1341 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __x64_sys_ioctl+0x193/0x220 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc04ef73d49 ...

This change has not been tested on real hardware.

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 PROB
0%
EPSS %ILE
10%
KEV
Not listed

Published

February 27, 2025

Last Modified

November 3, 2025

References (10)

Patch Availability(31)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-aws (6.11.0-1014.15) @ oracular2026-05-30ubuntu
ubuntulinux-virtual-hwe-18.04-edge (5.4.0.216.236~18.04.1) @ bionic2026-05-30ubuntu
ubuntulinux-tools-oracle-edge (5.4.0.1144.154~18.04.1) @ bionic2026-05-30ubuntu
ubuntulinux-tools-kvm (5.4.0.1133.129) @ focal2026-05-30ubuntu
ubuntulinux-tools-ibm-edge (5.4.0.1092.97~18.04.1) @ bionic2026-05-30ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (6.8.0-64.67.1) @ noble2026-05-30ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1083.92~20.04.1) @ focal2026-05-30ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.4.0-1064 (5.4.0-1064.68) @ focal2026-05-30ubuntu
ubuntulinux-tools-gcp-lts-22.04 (5.15.0.1083.79) @ jammy2026-05-30ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.11.0-26.26) @ oracular2026-05-30ubuntu
ubuntulinux-tools-azure-fips (5.4.0.1151.88) @ focal2026-05-30ubuntu
ubuntulinux-tools-gcp-fips (5.15.0.1083.73) @ jammy2026-05-30ubuntu
ubuntulinux-tools-gcp-fips (5.4.0.1149.91) @ focal2026-05-30ubuntu
ubuntulinux-virtual-hwe-18.04-edge (5.4.0.216.208) @ focal2026-05-30ubuntu
ubuntulinux-tools-azure-fips (5.15.0.1089.74) @ jammy2026-05-30ubuntu
ubuntulinux-tools-gcp-lts-24.04 (6.8.0-1033.35) @ noble2026-05-30ubuntu
ubuntulinux-tools-bluefield (5.4.0.1105.101) @ focal2026-05-30ubuntu
ubuntulinux-tools-oracle-64k (6.11.0-1016.17) @ oracular2026-05-30ubuntu
ubuntulinux-tools-raspi-6.8 (6.8.0-1031.35) @ noble2026-05-30ubuntu
ubuntulinux-tools-aws-fips (5.15.0.1084.80) @ jammy2026-05-30ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1078.76) @ jammy2026-05-30ubuntu
ubuntulinux-tools-raspi-hwe-18.04-edge (5.4.0.1129.142~18.04.1) @ bionic2026-05-30ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2026.27) @ noble2026-05-30ubuntu
ubuntulinux-tools-fips (5.15.0.140.80) @ jammy2026-05-30ubuntu
ubuntulinux-tools-nvidia-tegra-rt (5.15.0.1037.37) @ jammy2026-05-30ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1081.87~20.04.1) @ focal2026-05-30ubuntu
ubuntulinux-tools-gke-5.15 (5.15.0.1081.80) @ jammy2026-05-30ubuntu
ubuntulinux-tools-realtime (5.15.0.1084.88) @ jammy2026-05-30ubuntu
ubuntulinux-tools-aws-edge (5.15.0.1084.91~20.04.1) @ focal2026-05-30ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-64.67~22.04.1) @ jammy2026-05-30ubuntu
linuxKernel @ 5.4.291—osv

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.

All Vendor Advisories

(25)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 7× in last 7d / 39× 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.

Showing the most recent 100 of 108 total refreshes for this CVE.

  1. 2026-08-07 16:26 UTCEPSS rescore
  2. 2026-08-06 13:46 UTCEPSS rescore
  3. 2026-08-05 19:16 UTCEPSS rescore
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  15. 2026-07-24 13:41 UTCOSV refresh
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  17. 2026-07-23 02:50 UTCEG score recompute
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  1. 2026-07-18 10:03 UTCEPSS rescore
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  14. 2026-07-09 19:09 UTCEPSS rescore
  15. 2026-07-08 15:14 UTCEPSS rescore
  16. 2026-07-07 13:45 UTCEPSS rescore
  17. 2026-07-07 09:21 UTCOSV refresh
  18. 2026-07-06 16:26 UTCEPSS rescore
  19. 2026-07-06 02:22 UTCEPSS rescore
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  21. 2026-07-04 06:30 UTCEPSS rescore
  22. 2026-07-01 15:06 UTCEPSS rescore
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  25. 2026-06-29 14:06 UTCEPSS rescore
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  44. 2026-06-19 19:25 UTCEPSS rescore
  45. 2026-06-19 19:25 UTCEPSS rescore
  46. 2026-06-18 20:13 UTCOSV refresh
  47. 2026-06-18 17:52 UTCEPSS rescore
  48. 2026-06-18 17:52 UTCEPSS rescore
  49. 2026-06-17 17:52 UTCEPSS rescore
  50. 2026-06-16 17:52 UTCEPSS rescore
  51. 2026-06-16 17:52 UTCEPSS rescore
  52. 2026-06-15 17:48 UTCEPSS rescore
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  54. 2026-06-13 22:59 UTCEPSS rescore
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  63. 2026-06-06 13:47 UTCEPSS rescore
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  73. 2026-06-01 13:51 UTCEPSS rescore
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  75. 2026-05-31 22:30 UTCEPSS rescore

Related CVEs(same product + same vendor)

Frequently asked(5)

What is CVE-2025-21708?
CVE-2025-21708 is a medium vulnerability published on February 27, 2025. In the Linux kernel, the following vulnerability has been resolved: net: usb: rtl8150: enable basic endpoint checking Syzkaller reports [1] encountering a common issue of utilizing a wrong usb endpoint type during URB submitting stage. This, in turn, triggers a warning shown below. For now, enable…
When was CVE-2025-21708 disclosed?
CVE-2025-21708 was first published in the National Vulnerability Database on February 27, 2025, with the most recent update on November 3, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-21708 actively exploited?
CVE-2025-21708 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 89.8% of all scored CVEs.
What is the CVSS score of CVE-2025-21708?
CVE-2025-21708 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2025-21708?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-21708, 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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