CVE-2026-63956: linux

CVSS: UnknownAwaiting analysis
AliasesUBUNTU-CVE-2026-63956DEBIAN-CVE-2026-63956
Published 19-07-2026Last modified 19-07-2026
Open JSON

Vulnerability summary

CVE-2026-63956 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 11.4% 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
0.22%
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 27 · Related 27
OPENSUSE-SU-2026:22091-1SUSE-SU-2026:24179-1SUSE-SU-2026:24181-1SUSE-SU-2026:24182-1SUSE-SU-2026:24184-1SUSE-SU-2026:4640-1

Timeline

  1. 19-07-2026
    PublishedVulnerability first disclosed.

Description

In the Linux kernel, the following vulnerability has been resolved: USB: serial: cypress_m8: fix memory corruption with small endpoint Make sure that the interrupt-out endpoint max packet size is at least eight bytes to avoid user-controlled slab corruption or NULL-pointer dereference should a malicious device report a smaller size.

CVSS metrics

Risk metrics not yet published.

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 21-09-2026

21-09-202621-10-2026
EPSS score
0.22%

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≥ 3416eaa1f8f8d516b77de514e14cf8da256d28fb, < 4fcb22218f0a7229b7ce3b3952fb644def293fa5 | ≥ 3416eaa1f8f8d516b77de514e14cf8da256d28fb, < ad3d1628a46134276546d7a12fedf04be9979158 | ≥ 3416eaa1f8f8d516b77de514e14cf8da256d28fb, < 52e18ae0c47c5c89e18fcd8022f287f7cc8802ec | ≥ 3416eaa1f8f8d516b77de514e14cf8da256d28fb, < 4bcaa59f403dbde6328604a500d65ee8d40975d9 | ≥ 3416eaa1f8f8d516b77de514e14cf8da256d28fb, < 1ef25704bd3b625fd151c09feee459479f71ee64 | ≥ 3416eaa1f8f8d516b77de514e14cf8da256d28fb, < 284105c40fc31fff90cdab8a0377aaeb92f87f0e | ≥ 3416eaa1f8f8d516b77de514e14cf8da256d28fb, < 6c13f3bb652bc8665e709ba07122612586aea648 | ≥ 3416eaa1f8f8d516b77de514e14cf8da256d28fb, < e1a9d791fd66ab2431b9e6f6f835823809869047 | 2.6.26

3 vendors · 169 products

References

31 links
Show all 31 references