7.5

CVE-2025-68806: linux

CVSS: 7.5v3.1HighDeferred
AliasesUBUNTU-CVE-2025-68806DEBIAN-CVE-2025-68806
Published 13-01-2026Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2025-68806 is a high (CVSS 7.5) vulnerability in linux. EPSS estimates a 0.45% chance of exploitation in the next 30 days, higher than 37.4% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.45%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 23 · Related 20
DLA-4476-1DSA-6126-1DSA-6127-1MGASA-2026-0017MGASA-2026-0018USN-8177-1

Timeline

  1. 13-01-2026
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix buffer validation by including null terminator size in EA length The smb2_set_ea function, which handles Extended Attributes (EA), was performing buffer validation checks that incorrectly omitted the size of the null terminating character (+1 byte) for EA Name. This patch fixes the issue by explicitly adding '+ 1' to EaNameLength where the null terminator is expected to be present in the buffer, ensuring the validation accurately reflects the total required buffer size.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.45%

Chance of exploitation in the next 30 days

Percentile

37%

Versus all other CVEs

30-day change

+0.01 pp

From 0.44% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.45%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu157 products
  • linuxAll versions (No fix recorded) | < 6.8.0-110.110 | < 6.17.0-22.22
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1052.55 | < 6.17.0-1012.12
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.162-1 | < 6.12.69-1 | < 6.18.3-1
Linux1 product
  • linux≥ d070c4dd2a5bed4e9832eec5b6c029c7d14892ea, < cae52c592a07e1d3fa3338a5f064a374a5f26750 | ≥ 0ba5439d9afa2722e7728df56f272c89987540a4, < a28a375a5439eb474e9f284509a407efb479c925 | ≥ 0ba5439d9afa2722e7728df56f272c89987540a4, < d26af6d14da43ab92d07bc60437c62901dc522e6 | ≥ 0ba5439d9afa2722e7728df56f272c89987540a4, < 6dc8cf6e7998ef7aeb9383a4c2904ea5d22fa2e4 | ≥ 0ba5439d9afa2722e7728df56f272c89987540a4, < 95d7a890e4b03e198836d49d699408fd1867cb55 | bb5bf157b5be1643cccc7cbbe57fcdef9ae52c2c | 1a13ecb96230e8b7b91967e292836f7b01ec8111 | 404e7c01e16288b5e0171d1d8fd3328e806d0794 | ≥ 6.1.52, < 6.1.160 | ≥ 5.15.131, < 5.16 | ≥ 6.4.15, < 6.5 | ≥ 6.5.2, < 6.6 | 6.6

3 vendors · 159 products

References

30 links
Show all 30 references