7.8

CVE-2026-64217: linux Out-of-bounds Write

CVSS: 7.8v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-64217DEBIAN-CVE-2026-64217
Published 24-07-2026Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2026-64217 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.3% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.13%
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 30 · Related 30
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. 24-07-2026
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: netfs: Fix overrun check in netfs_extract_user_iter() Fix netfs_extract_user_iter() so that if iov_iter_extract_pages() overfills pages[], then those pages don't get included in the iterator constructed at the end of the function. If there was an overfill, memory corruption has already happened.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

0.00 pp

From 0.13% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.13%

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

Ubuntu140 products
  • linux< 6.8.0-139.139 | < 7.0.0-28.28
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1064.67 | < 7.0.0-1009.9
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 85dd2c8ff368b1446be9febde84afe1d7aec4261, < 00efe58bbdcc93272d579ca24bfc912563f4a204 | ≥ 85dd2c8ff368b1446be9febde84afe1d7aec4261, < 96cc3beb2390ba9f9c128c5733c0ccfe450dd4f9 | ≥ 85dd2c8ff368b1446be9febde84afe1d7aec4261, < afeb32d9bf9aaeea51d0f723a19f14afb73bd94d | ≥ 85dd2c8ff368b1446be9febde84afe1d7aec4261, < f48b9157f0f611fa436c360648603d5ded719b12 | ≥ 85dd2c8ff368b1446be9febde84afe1d7aec4261, < 0ef37eef83fad3542ee06db2940433ae1a92b39d | 6.3
  • linux_kernel≥ 6.3, < 6.6.142 | ≥ 6.7, < 6.12.92 | ≥ 6.13, < 6.18.34 | ≥ 6.19, < 7.0.11 | 7.1:rc1 | 7.1:rc2 | 7.1:rc3 | 7.1:rc4
Debian1 product
  • linux< 6.12.94-1 | < 7.0.12-1

3 vendors · 143 products

References

27 links
Show all 27 references