9.8

CVE-2026-64068: netfs: Fix missing locking around retry adding new subreqs

Modified
AliasesUBUNTU-CVE-2026-64068DEBIAN-CVE-2026-64068CGA-2234-893q-jj6p
Published 19-07-2026Last modified 21-10-2026

Vulnerability summary

CVE-2026-64068 is a critical (CVSS 9.8) Improper Locking vulnerability in linux. EPSS estimates a 0.35% chance of exploitation in the next 30 days, higher than 29% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 9.8 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 0% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.35%
0%100%
Low · -0.15 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 13 · Related 13
OPENSUSE-SU-2026:22167-1SUSE-SU-2026:24386-1SUSE-SU-2026:24422-1SUSE-SU-2026:24437-1SUSE-SU-2026:24446-1USN-8593-1

Timeline

  1. 19-07-2026
    PublishedVulnerability first disclosed.
  2. 21-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: netfs: Fix missing locking around retry adding new subreqs Fix netfs_retry_read_subrequests() and netfs_retry_write_stream() to take the appropriate lock when adding extra subrequests into stream->subrequests.

CVSS metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

0.35%

Chance of exploitation in the next 30 days

Percentile

29%

Versus all other CVEs

30-day change

Decrease -0.15 pp

From 0.50% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu118 products
  • linux< 7.0.0-28.28
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 7.0.0-1009.9
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Chainguard45 products
  • hyperv-daemons-6.18All versions (No fix recorded)
  • linux-aws-6.18All versions (No fix recorded)
  • linux-aws-6.18-boot-installedAll versions (No fix recorded)
  • linux-aws-6.18-bootcAll versions (No fix recorded)
  • linux-aws-6.18-bootc-boot-installedAll versions (No fix recorded)
Linux2 products
  • linux≥ 288ace2f57c9d06dd2e42bd80d03747d879a4068, < f59c4ec86ef3a9ac99706ae163a38ec28129fd76 | ≥ 288ace2f57c9d06dd2e42bd80d03747d879a4068, < d5c9d19b0ff2f7153532ac238a5e96fed2df315c | ≥ 288ace2f57c9d06dd2e42bd80d03747d879a4068, < 393f3f0d7353a94b1e0bc4ca89c683fe983e5fd2 | ≥ 288ace2f57c9d06dd2e42bd80d03747d879a4068, < cce18c263e9623872327ba3c956012f73c1179cc | 6.10
  • linux_kernel≥ 6.10, < 7.0.11 | 7.1:rc1 | 7.1:rc2 | 7.1:rc3 | 7.1:rc4
Debian1 product
  • linuxAll versions (No fix recorded) | < 6.12.115-2 | < 7.0.12-1

4 vendors · 166 products

References

19 links
Show all 19 references