7.8

CVE-2025-37813: usb: xhci: Fix invalid pointer dereference in Etron workaround

Modified
AliasesUBUNTU-CVE-2025-37813DEBIAN-CVE-2025-37813
Published 08-05-2025Last modified 15-10-2026

Vulnerability summary

CVE-2025-37813 is a high (CVSS 7.8) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.8% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.20%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 32 · Related 30
MGASA-2025-0182MGASA-2025-0183SUSE-SU-2025:02254-1SUSE-SU-2025:02307-1SUSE-SU-2025:02333-1SUSE-SU-2026:0447-1

Timeline

  1. 08-05-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: usb: xhci: Fix invalid pointer dereference in Etron workaround This check is performed before prepare_transfer() and prepare_ring(), so enqueue can already point at the final link TRB of a segment. And indeed it will, some 0.4% of times this code is called. Then enqueue + 1 is an invalid pointer. It will crash the kernel right away or load some junk which may look like a link TRB and cause the real link TRB to be replaced with a NOOP. This wouldn't end well. Use a functionally equivalent test which doesn't dereference the pointer and always gives correct result. Something has crashed my machine twice in recent days while playing with an Etron HC, and a control transfer stress test ran for confirmation has just crashed it again. The same test passes with this patch applied.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

10%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.20% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu114 products
  • linux< 6.8.0-100.100
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1046.49
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ fbc0a0c7718a6cb1dc5e0811a4f88a2b1deedfa1, < 142273a49f2c315eabdbdf5a71c15e479b75ca91 | ≥ 9258c9ed32294ce3a4b58c9d92fc49ba030d35c9, < bce3055b08e303e28a8751f6073066f5c33a0744 | ≥ 5e1c67abc9301d05130b7e267c204e7005503b33, < 0624e29c595b05e7a0e6d1c368f0a05799928e30 | ≥ 5e1c67abc9301d05130b7e267c204e7005503b33, < 1ea050da5562af9b930d17cbbe9632d30f5df43a | 4725344ca645a98a9d8e45e25b01a2244de5b8aa | ≥ 6.6.66, < 6.6.89 | ≥ 6.12.2, < 6.12.26 | ≥ 6.11.11, < 6.12 | 6.13
  • linux_kernel≥ 6.6.66, < 6.6.89 | ≥ 6.11.11, < 6.12 | ≥ 6.12.2, < 6.12.26 | ≥ 6.13, < 6.14.5 | 6.15:rc1 | 6.15:rc2 | 6.15:rc3
Debian1 product
  • linux< 6.12.27-1

3 vendors · 117 products

References

27 links
Show all 27 references