CVE-2026-63899: linux

CVSS: UnknownAwaiting analysis
AliasesUBUNTU-CVE-2026-63899DEBIAN-CVE-2026-63899
Published 19-07-2026Last modified 19-07-2026
Open JSON

Vulnerability summary

CVE-2026-63899 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 12.4% 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 · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 33 · Related 32
OPENSUSE-SU-2026:21555-1RHSA-2026:83207SUSE-SU-2026:23066-1SUSE-SU-2026:23068-1SUSE-SU-2026:23193-1SUSE-SU-2026:23194-1

Timeline

  1. 19-07-2026
    PublishedVulnerability first disclosed.

Description

In the Linux kernel, the following vulnerability has been resolved: USB: serial: mxuport: fix memory corruption with small endpoint Make sure that the bulk-out endpoint max packet size is at least eight bytes to avoid user-controlled slab corruption should a malicious device report a smaller size.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.23%

Chance of exploitation in the next 30 days

Percentile

12%

Versus all other CVEs

30-day change

0.00 pp

From 0.23% on 19-09-2026

19-09-202619-10-2026
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≥ ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e, < 086b858b5f5125bc9d967ea2bd825f83d9f8f29d | ≥ ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e, < 2f3661eb2446e1ef593da45e01a3b21a906768ec | ≥ ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e, < ccbec56f2f9af008f1574335cc6a668f16603e47 | ≥ ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e, < be3a1ed4ae51fa8dde57383277d336ce834f2cd9 | ≥ ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e, < e906545641d34fb1a09a65b4b5cfdff40eb09681 | ≥ ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e, < 6c0cf56f00f280d72180bb6ce79741bc787a6269 | ≥ ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e, < b40166b4ef96067620a0f248e74ad9658c8f680c | ≥ ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e, < 4085f0dbb1ce2251c9a5938d693de6593f0ab2bd | 3.14

3 vendors · 169 products

References

31 links
Show all 31 references