5.5

CVE-2026-64163: linux

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-64163DEBIAN-CVE-2026-64163
Published 19-07-2026Last modified 19-07-2026
Open JSON

Vulnerability summary

CVE-2026-64163 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.12% chance of exploitation in the next 30 days, higher than 1.6% 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
0.12%
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 20 · Related 20
USN-8593-1USN-8603-1USN-8618-1USN-8663-1USN-8664-1USN-8728-1

Timeline

  1. 19-07-2026
    PublishedVulnerability first disclosed.

Description

In the Linux kernel, the following vulnerability has been resolved: test_kprobes: clear kprobes between test runs Running the kprobes sanity tests twice makes all tests fail and eventually crashes the kernel. [root@martin-riscv-1 ~]# echo 1 > /sys/kernel/debug/kunit/kprobes_test/run ... # Totals: pass:5 fail:0 skip:0 total:5 ok 1 kprobes_test [root@martin-riscv-1 ~]# echo 1 > /sys/kernel/debug/kunit/kprobes_test/run ... # test_kprobe: EXPECTATION FAILED at lib/tests/test_kprobes.c:64 Expected 0 == register_kprobe(&kp), but register_kprobe(&kp) == -22 (0xffffffffffffffea) ... Unable to handle kernel paging request ... The testsuite defines several kprobes and kretprobes as static variables that are preserved across test runs. After register_kprobe and unregister_kprobe, a kprobe contains some leftover data that must be cleared before the kprobe can be registered again. The tests are setting symbol_name to define the probe location. Address and flags must be cleared. The existing code clears some of the probes between subsequent tests, but not between two test runs. The leftover data from a previous test run makes the registrations fail in the next run. Move the cleanups for all kprobes into kprobes_test_init, this function is called before each single test (including the first test of a test run).

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.12%

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
0.12%

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

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≥ e44e81c5b90f698025eadceb7eef8661eda117d5, < 08d355936fcf70c81c94f9fe7310450b65c53399 | ≥ e44e81c5b90f698025eadceb7eef8661eda117d5, < accc0004c501a9918313142282b094d408af06fb | ≥ e44e81c5b90f698025eadceb7eef8661eda117d5, < 1c24cf1fd67f6702c719ab73499392cb7af956ae | ≥ e44e81c5b90f698025eadceb7eef8661eda117d5, < 96515819d79f356f40da5540968d838ea570fab9 | ≥ e44e81c5b90f698025eadceb7eef8661eda117d5, < ef5581bb30efb939cc2bf093475c6cc85258e5cd | 5.16
  • linux_kernel≥ 5.16, < 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
Debian1 product
  • linuxAll versions (No fix recorded) | < 6.12.94-1 | < 7.0.12-1

3 vendors · 143 products

References

29 links
Show all 29 references