5.5

CVE-2026-53327: linux

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-53327DEBIAN-CVE-2026-53327
Published 01-07-2026Last modified 04-07-2026
Open JSON

Vulnerability summary

CVE-2026-53327 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.3% 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 14 · Related 13
MGASA-2026-0312USN-8726-1USN-8726-2USN-8726-3USN-8726-4USN-8727-1

Timeline

  1. 01-07-2026
    PublishedVulnerability first disclosed.
  2. 04-07-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: debugobjects: Do not fill_pool() if pi_blocked_on On RT enabled kernels, fill_pool() ends up calling rtlock_lock(), which asserts if current::pi_blocked_on is set, because a task can obviously only block on one lock as otherwise the priority inheritenace chain gets corrupted. Prevent this by expanding the conditional to take current::pi_blocked_on into account.

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 0.13% 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

Ubuntu157 products
  • linuxAll versions (No fix recorded) | < 6.8.0-147.147 | < 7.0.0-31.31
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1067.70 | < 7.0.0-1012.12
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 4bedcc28469a24fe481a8a31b3584e6070457ddb, < 8a680d54f1adf3e3aa815578684556716fda6f0c | ≥ 4bedcc28469a24fe481a8a31b3584e6070457ddb, < a3383df76f0d7a597066df018409eb9e5e698064 | ≥ 4bedcc28469a24fe481a8a31b3584e6070457ddb, < 3f6a3b24ab7b9d51f6f4778254bef0e5847beb55 | ≥ 4bedcc28469a24fe481a8a31b3584e6070457ddb, < 3a408cae608d9c075dd3a9e5cfc03b3cb0726863 | ≥ 4bedcc28469a24fe481a8a31b3584e6070457ddb, < 33bee10644f8fff3b1a0187ad5ad34513e5e8e72 | ≥ 4bedcc28469a24fe481a8a31b3584e6070457ddb, < 5f41161059fd0f1bbf18c90f3180e38cc45a14eb | 5.15
  • linux_kernel≥ 5.15, < 6.1.177 | ≥ 6.2, < 6.6.144 | ≥ 6.7, < 6.12.95 | ≥ 6.13, < 6.18.37 | ≥ 6.19, < 7.0.13 | 7.1:rc1 | 7.1:rc2 | 7.1:rc3 | 7.1:rc4
Debian1 product
  • linux< 6.1.177-1 | < 6.12.95-1 | < 7.0.13-1

3 vendors · 160 products

References

23 links
Show all 23 references