5.5

CVE-2026-53168: linux

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2026-53168DEBIAN-CVE-2026-53168CGA-34v3-c7vf-8m24
Published 25-06-2026Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2026-53168 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
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 35 · Related 35
MGASA-2026-0312OPENSUSE-SU-2026:21388-1SUSE-SU-2026:22742-1SUSE-SU-2026:22769-1SUSE-SU-2026:22809-1SUSE-SU-2026:22810-1

Timeline

  1. 25-06-2026
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: fuse: reject fuse_notify() pagecache ops on directories The operations FUSE_NOTIFY_STORE and FUSE_NOTIFY_RETRIEVE allow the FUSE daemon to actively write/read pagecache contents. For directories with FOPEN_CACHE_DIR, the pagecache is used as kernel-internal cache storage, and userspace is not supposed to have direct access to this cache - in particular, fuse_parse_cache() will hit WARN_ON() if the cache contains bogus data. Reject FUSE_NOTIFY_STORE and FUSE_NOTIFY_RETRIEVE on anything other than regular files with -EINVAL.

CVSS metrics

4 scores · 3 sources · 2 versions

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 0.12% on 19-09-2026

19-09-202619-10-2026
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

No weakness data has been published for this record.

Affected systems

Ubuntu164 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 6.8.0-146.146 | < 7.0.0-31.31
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 6.8.0-1066.69 | < 7.0.0-1012.12
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Chainguard11 products
  • linux-aws-6.12< 6.12.95-r0
  • linux-aws-6.18< 6.18.38-r0
  • linux-azure-6.18< 6.18.38-r0
  • linux-gcp-6.18< 6.18.38-r0
  • linux-gcp-6.18-bootc-boot-installed< 6.18.38-r0
Linux2 products
  • linux≥ 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0, < 15487f98863dc7156ed43c5be26d478beb82ba35 | ≥ 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0, < bd23fa0c16c5c86e5b7713224ffbb87d9db81cca | ≥ 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0, < 9dbf1b2fadfc6c40805631d8a8276d1639fc9ab6 | ≥ 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0, < dd92773d4d9cea010474eb08a5133c14ff6ab53a | ≥ 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0, < 99c317d7f8b7bbf3de16d20a01f363e390114cea | ≥ 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0, < 12df4cfa738aefff21756728e91056d7defb0fe6 | ≥ 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0, < e692f0cb86204dcdb9dddc0b355407eda6394a67 | ≥ 5d7bc7e8680c7ca4c8a4f139ce2a54ccb8131ef0, < 9c954499d43aefac01c5dfb57a82b13d2dcf4b94 | 4.20
  • linux_kernel≥ 4.20, < 5.10.259 | ≥ 5.11, < 5.15.210 | ≥ 5.16, < 6.1.176 | ≥ 6.2, < 6.6.143 | ≥ 6.7, < 6.12.94 | ≥ 6.13, < 6.18.36 | ≥ 6.19, < 7.0.13 | 7.1:rc1 | 7.1:rc2 | 7.1:rc3 | 7.1:rc4 | 7.1:rc5 | 7.1:rc6
Debian1 product
  • linux< 6.1.176-1 | < 6.12.94-1 | < 7.0.13-1

4 vendors · 178 products

References

37 links
Show all 37 references