CVE-2025-21743: linux Out-of-bounds Read
Vulnerability summary
CVE-2025-21743 is a high (CVSS 7.1) Out-of-bounds Read vulnerability in linux. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 11.2% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 20 · Related 20Timeline
- 27-02-2025PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: usbnet: ipheth: fix possible overflow in DPE length check Originally, it was possible for the DPE length check to overflow if wDatagramIndex + wDatagramLength > U16_MAX. This could lead to an OoB read. Move the wDatagramIndex term to the other side of the inequality. An existing condition ensures that wDatagramIndex < urb->actual_length.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- NVDNIST7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
EPSS trend
Probability
0.22%
Chance of exploitation in the next 30 days
Percentile
11%
Versus all other CVEs
30-day change
+0.01 pp
From 0.21% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu106 products
- linux< 6.8.0-64.67
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 6.8.0-1032.34
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ a2d274c62e44b1995c170595db3865c6fe701226, < 18bf6f5cce3172cb303c3f0551aa9443d5ed74f8 | ≥ a2d274c62e44b1995c170595db3865c6fe701226, < d677e7dd59ad6837496f5a02d8e5d39824278dfd | ≥ a2d274c62e44b1995c170595db3865c6fe701226, < d824a964185910e317287f034c0a439c08b4fe49 | ≥ a2d274c62e44b1995c170595db3865c6fe701226, < c219427ed296f94bb4b91d08626776dc7719ee27 | 6.5
- linux_kernel≥ 6.5, < 6.6.78 | ≥ 6.7, < 6.12.14 | ≥ 6.13, < 6.13.3
Debian1 product
- linux< 6.12.15-1
3 vendors · 109 products
