5.5

CVE-2026-64244: linux

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-64244DEBIAN-CVE-2026-64244
Published 24-07-2026Last modified 17-08-2026
Open JSON

Vulnerability summary

CVE-2026-64244 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.11% chance of exploitation in the next 30 days, higher than 1.4% 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
0.11%
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 21 · Related 21
OPENSUSE-SU-2026:11476-1OPENSUSE-SU-2026:21910-1SUSE-SU-2026:23881-1SUSE-SU-2026:23887-1SUSE-SU-2026:23897-1SUSE-SU-2026:23902-1

Timeline

  1. 24-07-2026
    PublishedVulnerability first disclosed.
  2. 17-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: drivers/base/memory: set mem->altmap after successful device registration If __add_memory_block() fails at xa_store() (under memory pressure for example), device_unregister() is called, which eventually triggers memory_block_release() with mem->altmap still set, causing a WARN_ON(mem->altmap). This was triggered by modifying virtio-mem driver. Fix this by delaying the assignment of mem->altmap until after __add_memory_block() has succeeded.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.11%

Chance of exploitation in the next 30 days

Percentile

1%

Versus all other CVEs

30-day change

0.00 pp

From 0.11% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.11%

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

Ubuntu142 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≥ 1a8c64e110435e44e71bcd50a75663174b575f22, < 802e113cf120df7208e4c7e604950a85e87120a8 | ≥ 1a8c64e110435e44e71bcd50a75663174b575f22, < 22dc0d042f02ce82aa61422ea5f232628bfd9e9c | ≥ 1a8c64e110435e44e71bcd50a75663174b575f22, < 6c25bf4e44a2b6a14332f952bba0974521f5b72d | ≥ 1a8c64e110435e44e71bcd50a75663174b575f22, < bc3dd82a0ffd488bb902f4c69c3d28fd4088d973 | ≥ 1a8c64e110435e44e71bcd50a75663174b575f22, < 059ac6252a63edf1cea79bf30bd860a8c264b62c | ≥ 1a8c64e110435e44e71bcd50a75663174b575f22, < a2b8d7827f48ee54a686cb80e4a1d0ff954ec42a | 6.6
  • linux_kernel≥ 6.6, < 6.6.144 | ≥ 6.7, < 6.12.95 | ≥ 6.13, < 6.18.37 | ≥ 6.19, < 7.0.14 | ≥ 7.1, < 7.1.2
Debian1 product
  • linux< 6.12.95-1 | < 7.0.14-1

3 vendors · 145 products

References

24 links
Show all 24 references