5.5

CVE-2025-39728: linux Improper Validation of Array Index

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2025-39728DEBIAN-CVE-2025-39728
Published 18-04-2025Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2025-39728 is a medium (CVSS 5.5) Improper Validation of Array Index vulnerability in linux. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 19% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.28%
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 45 · Related 40
DLA-4178-1DLA-4193-1DSA-5907-1MGASA-2025-0142MGASA-2025-0146SUSE-SU-2025:01614-1

Timeline

  1. 18-04-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: clk: samsung: Fix UBSAN panic in samsung_clk_init() With UBSAN_ARRAY_BOUNDS=y, I'm hitting the below panic due to dereferencing `ctx->clk_data.hws` before setting `ctx->clk_data.num = nr_clks`. Move that up to fix the crash. UBSAN: array index out of bounds: 00000000f2005512 [#1] PREEMPT SMP <snip> Call trace: samsung_clk_init+0x110/0x124 (P) samsung_clk_init+0x48/0x124 (L) samsung_cmu_register_one+0x3c/0xa0 exynos_arm64_register_cmu+0x54/0x64 __gs101_cmu_top_of_clk_init_declare+0x28/0x60 ...

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.28%

Chance of exploitation in the next 30 days

Percentile

19%

Versus all other CVEs

30-day change

0.00 pp

From 0.27% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.28%

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

Affected systems

Ubuntu125 products
  • linux< 5.15.0-142.152 | < 6.8.0-86.87
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1086.93 | < 6.8.0-1041.43
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ e620a1e061c4738e26c3edf2abaae7842532cd80, < 00307934eb94aaa0a99addfb37b9fe206f945004 | ≥ e620a1e061c4738e26c3edf2abaae7842532cd80, < d974e177369c034984cece9d7d4fada9f8b9c740 | ≥ e620a1e061c4738e26c3edf2abaae7842532cd80, < 0fef48f4a70e45a93e73c39023c3a6ea624714d6 | ≥ e620a1e061c4738e26c3edf2abaae7842532cd80, < 4d29a6dcb51e346595a15b49693eeb728925ca43 | ≥ e620a1e061c4738e26c3edf2abaae7842532cd80, < 24307866e0ac0a5ddb462e766ceda5e27a6fbbe3 | ≥ e620a1e061c4738e26c3edf2abaae7842532cd80, < a1500b98cd81a32fdfb9bc63c33bb9f0c2a0a1bf | ≥ e620a1e061c4738e26c3edf2abaae7842532cd80, < 157de9e48007a20c65d02fc0229a16f38134a72d | ≥ e620a1e061c4738e26c3edf2abaae7842532cd80, < d19d7345a7bcdb083b65568a11b11adffe0687af | 5.5
  • linux_kernel≥ 5.5, < 5.10.236 | ≥ 5.11, < 5.15.180 | ≥ 5.16, < 6.1.134 | ≥ 6.2, < 6.6.87 | ≥ 6.7, < 6.12.23 | ≥ 6.13, < 6.13.11 | ≥ 6.14, < 6.14.2
Debian1 product
  • linux< 6.1.135-1 | < 6.12.25-1

3 vendors · 128 products

References

44 links
Show all 44 references