CVE-2026-63898: linux

CVSS: UnknownAwaiting analysis
AliasesUBUNTU-CVE-2026-63898DEBIAN-CVE-2026-63898
Published 19-07-2026Last modified 19-07-2026
Open JSON

Vulnerability summary

CVE-2026-63898 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.23% chance of exploitation in the next 30 days, higher than 12.5% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.23%
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 31 · Related 31
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.

Description

In the Linux kernel, the following vulnerability has been resolved: USB: serial: mct_u232: fix memory corruption with small endpoint The driver overrides the maximum transfer size for a specific device which only accepts 16 byte packets for its 32 byte bulk-out endpoint. Make sure to never increase the maximum transfer size to prevent slab corruption should a malicious device report a smaller endpoint max packet size than expected.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.23%

Chance of exploitation in the next 30 days

Percentile

13%

Versus all other CVEs

30-day change

+0.01 pp

From 0.22% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.23%

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

Ubuntu167 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 6.8.0-146.146 | < 7.0.0-28.28
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 6.8.0-1066.69 | < 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 | < 7.0.12-1
Linux1 product
  • linux≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 94edbbc5fe00d03cfe1d4e690d7d2cd36317a935 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < bd2ddb3fe9052ad8703593bbec26ecc7ca92869e | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 39e295a91e80f3b91f61c7ada2bde434dcaba20d | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 90dbad14b109e5fdfb4934ff61e561d11ba3742d | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 6cb48f8890f9b2051d7c34823057296a536a31c5 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < d8fdf33d6fcfb90cbec26299baf2352c84b2d768 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 57f332af1745014cd7e40414814ffaa6bc7d3b5b | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 915b36d701950503c4ea0f6e314b10868e59fce3 | 2.6.12

3 vendors · 169 products

References

31 links
Show all 31 references