5.5

CVE-2025-38071: debian debian_linux

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2025-38071DEBIAN-CVE-2025-38071
Published 18-06-2025Last modified 15-10-2026

Vulnerability summary

CVE-2025-38071 is a medium (CVSS 5.5) vulnerability in debian debian_linux. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 7.5% 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
0.18%
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 25 · Related 23

Timeline

  1. 18-06-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: x86/mm: Check return value from memblock_phys_alloc_range() At least with CONFIG_PHYSICAL_START=0x100000, if there is < 4 MiB of contiguous free memory available at this point, the kernel will crash and burn because memblock_phys_alloc_range() returns 0 on failure, which leads memblock_phys_free() to throw the first 4 MiB of physical memory to the wolves. At a minimum it should fail gracefully with a meaningful diagnostic, but in fact everything seems to work fine without the weird reserve allocation.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

8%

Versus all other CVEs

30-day change

0.00 pp

From 0.18% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.18%

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

Ubuntu146 products
  • linuxAll versions (No fix recorded) | < 6.8.0-100.100
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1046.49
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
Linux2 products
  • linux≥ a7259df7670240ee03b0cfce8a3e5d3773911e24, < 8c18c904d301ffeb33b071eadc55cd6131e1e9be | ≥ a7259df7670240ee03b0cfce8a3e5d3773911e24, < bffd5f2815c5234d609725cd0dc2f4bc5de2fc67 | ≥ a7259df7670240ee03b0cfce8a3e5d3773911e24, < c6f2694c580c27dca0cf7546ee9b4bfa6b940e38 | ≥ a7259df7670240ee03b0cfce8a3e5d3773911e24, < dde4800d2b0f68b945fd81d4fc2d4a10ae25f743 | ≥ a7259df7670240ee03b0cfce8a3e5d3773911e24, < 631ca8909fd5c62b9fda9edda93924311a78a9c4 | 5.15
  • linux_kernel< 6.1.141 | ≥ 6.2, < 6.6.93 | ≥ 6.7, < 6.12.31 | ≥ 6.13, < 6.14.9

3 vendors · 150 products

References

35 links
Show all 35 references