5.5

CVE-2025-39681: debian debian_linux

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2025-39681DEBIAN-CVE-2025-39681
Published 05-09-2025Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2025-39681 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 6.7% 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 46 · Related 40
DLA-4327-1DLA-4328-1DSA-6008-1DSA-6009-1MGASA-2025-0234MGASA-2025-0235

Timeline

  1. 05-09-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: x86/cpu/hygon: Add missing resctrl_cpu_detect() in bsp_init helper Since 923f3a2b48bd ("x86/resctrl: Query LLC monitoring properties once during boot") resctrl_cpu_detect() has been moved from common CPU initialization code to the vendor-specific BSP init helper, while Hygon didn't put that call in their code. This triggers a division by zero fault during early booting stage on our machines with X86_FEATURE_CQM* supported, where get_rdt_mon_resources() tries to calculate mon_l3_config with uninitialized boot_cpu_data.x86_cache_occ_scale. Add the missing resctrl_cpu_detect() in the Hygon BSP init helper. [ bp: Massage commit message. ]

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

0.00 pp

From 0.17% on 22-09-2026

22-09-202622-10-2026
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

Ubuntu136 products
  • linux< 5.15.0-163.173 | < 6.8.0-100.100
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1097.104 | < 6.8.0-1046.49
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.153-1 | < 6.12.48-1 | < 6.16.5-1
  • debian_linuxEOL11.0
Linux2 products
  • linux≥ 923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9, < 62f12cde10118253348a7540e85606869bd69432 | ≥ 923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9, < 873f32201df8876bdb2563e3187e79149427cab4 | ≥ 923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9, < fb81222c1559f89bfe3aa1010f6d112531d55353 | ≥ 923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9, < 7207923d8453ebfb35667c1736169f2dd796772e | ≥ 923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9, < a9e5924daa954c9f585c1ca00358afe71d6781c4 | ≥ 923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9, < d23264c257a70dbe021b43b3bc2ee16134cd2c69 | ≥ 923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9, < d8df126349dad855cdfedd6bbf315bad2e901c2f | 5.8
  • linux_kernel≥ 5.8, < 5.10.242 | ≥ 5.11, < 5.15.190 | ≥ 5.16, < 6.1.149 | ≥ 6.2, < 6.6.103 | ≥ 6.7, < 6.12.44 | ≥ 6.13, < 6.16.4 | 6.17:rc1 | 6.17:rc2

3 vendors · 140 products

References

42 links
Show all 42 references