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CVE-2025-38071 (GCVE-0-2025-38071)

Vulnerability from cvelistv5 – Published: 2025-06-18 09:33 – Updated: 2026-07-14 12:41
VLAI
Title
x86/mm: Check return value from memblock_phys_alloc_range()
Summary
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.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a7259df7670240ee03b0cfce8a3e5d3773911e24 , < 8c18c904d301ffeb33b071eadc55cd6131e1e9be (git)
Affected: a7259df7670240ee03b0cfce8a3e5d3773911e24 , < bffd5f2815c5234d609725cd0dc2f4bc5de2fc67 (git)
Affected: a7259df7670240ee03b0cfce8a3e5d3773911e24 , < c6f2694c580c27dca0cf7546ee9b4bfa6b940e38 (git)
Affected: a7259df7670240ee03b0cfce8a3e5d3773911e24 , < dde4800d2b0f68b945fd81d4fc2d4a10ae25f743 (git)
Affected: a7259df7670240ee03b0cfce8a3e5d3773911e24 , < 631ca8909fd5c62b9fda9edda93924311a78a9c4 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 6.1.141 , ≤ 6.1.* (semver)
Unaffected: 6.6.93 , ≤ 6.6.* (semver)
Unaffected: 6.12.31 , ≤ 6.12.* (semver)
Unaffected: 6.14.9 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
guessed Create a notification for this product.
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
guessed Create a notification for this product.
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
guessed Create a notification for this product.
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}



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  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.