8.4

CVE-2026-63860: linux Improper Null Termination

CVSS: 8.4v3.1HighAwaiting analysis
AliasesUBUNTU-CVE-2026-63860DEBIAN-CVE-2026-63860
Published 19-07-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-63860 is a high (CVSS 8.4) Improper Null Termination vulnerability in linux. EPSS estimates a 0.14% chance of exploitation in the next 30 days, higher than 3% of scored vulnerabilities.

Overall risk
34/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.4/10
010
High · v3.1 (CVE.org)
EPSS score
0.14%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 45 · Related 45
OPENSUSE-SU-2026:21910-1SUSE-SU-2026:23477-1SUSE-SU-2026:23481-1SUSE-SU-2026:23528-1SUSE-SU-2026:23529-1SUSE-SU-2026:23881-1

Timeline

  1. 19-07-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/core: Prefer NLA_NUL_STRING These attributes are evaluated as c-string (passed to strcmp), but NLA_STRING doesn't check for the presence of a \0 terminator. Either this needs to switch to nla_strcmp() and needs to adjust printf fmt specifier to not use plain %s, or this needs to use NLA_NUL_STRING. As the code has been this way for long time, it seems to me that userspace does include the terminating nul, even tough its not enforced so far, and thus NLA_NUL_STRING use is the simpler solution.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.14%

Chance of exploitation in the next 30 days

Percentile

3%

Versus all other CVEs

30-day change

0.00 pp

From 0.14% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.14%

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

Affected systems

Ubuntu166 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-136.136 | < 7.0.0-28.28
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1061.64 | < 7.0.0-1009.9
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.176-1 | < 6.12.94-1 | < 7.0.10-1
Linux1 product
  • linux≥ 30dc5e63d6a5ad24894b5512d10b228d73645a44, < fcd07d3b8ee7a39b344d73aed69c1a68cd9eacdf | ≥ 30dc5e63d6a5ad24894b5512d10b228d73645a44, < 87111356d58d86edb221ba144d261ed83a5b8bbe | ≥ 30dc5e63d6a5ad24894b5512d10b228d73645a44, < abda65bdd13084c771842adaac1f652d0660dd82 | ≥ 30dc5e63d6a5ad24894b5512d10b228d73645a44, < 137b5918931d4d05aa8ea8d3adf67f7224eef63c | ≥ 30dc5e63d6a5ad24894b5512d10b228d73645a44, < 5877c043398d5fa0e93919a3d837e5cd7a98a961 | ≥ 30dc5e63d6a5ad24894b5512d10b228d73645a44, < f2c7b39dde2e61df8157066969cc2a408cd3dcd9 | ≥ 30dc5e63d6a5ad24894b5512d10b228d73645a44, < c26a0052cceed4c4d380ee5808b699f937fb58d8 | ≥ 30dc5e63d6a5ad24894b5512d10b228d73645a44, < 6ed3d14fc45d3da6025e7fe4a6a09066856698e2 | 3.16

3 vendors · 168 products

References

45 links
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