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CVE-2025-38635

20
FAUCET Score

CVE-2025-38635 is a NULL pointer dereference vulnerability in the Linux kernel's clock driver for DaVinci platforms, specifically within the davinci_lpsc_clk_register() function. This flaw affects various Debian and Linux kernel distributions. Rated Medium (CVSS 5.5), an attacker with local access could trigger a denial-of-service condition due to memory allocation failure. There is no evidence of active exploitation, publicly available exploit code, or inclusion in CISA's KEV catalog, though it has garnered some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.17, < 5.4.297CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 5.5, < 5.10.241CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 5.11, < 5.15.190CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 5.16, < 6.1.148CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 6.2, < 6.6.102CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.17%
Probability of exploitation in next 30 days
EPSS Percentile
6.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0017 is in the 37th percentile among its peer group of 15,940 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (10)

microsoftpatch availablevia msrc
Product: 20412-17084Fixed in: 6.6.104.2-1
microsoftpatch availablevia msrc
Product: 17087-17086Fixed in: 5.15.200.1-1
microsoftpatch availablevia msrc
Product: azl3 kernel 6.6.96.2-2 on Azure Linux 3.0Fixed in: 6.6.104.2-1
microsoftpatch availablevia msrc
Product: cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0Fixed in: 5.15.200.1-1
ubuntupatch availablevia ubuntu_usn
Product: linux-xilinx (noble)Fixed in: 6.8.0-1023.24
ubuntupatch availablevia ubuntu_usn
Product: linux-azure-6.8 (jammy)Fixed in: 6.8.0-1051.57~22.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-azure (noble)Fixed in: 6.8.0-1046.52
ubuntupatch availablevia ubuntu_usn
Product: linux-ibm-6.8 (jammy)Fixed in: 6.8.0-1044.44~22.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-ibm (noble)Fixed in: 6.8.0-1044.44
ubuntupatch availablevia ubuntu_usn
Product: linux-azure-fips (noble)Fixed in: 6.8.0-1046.52+fips1

Vendor Advisories (7)

ubuntuUSN-8126-1

Linux kernel (Azure) vulnerabilities

Mar 25, 2026
ubuntuUSN-8074-2

Linux kernel (Azure FIPS) vulnerabilities

Mar 4, 2026
ubuntuUSN-8074-1

Linux kernel (Azure) vulnerabilities

Mar 4, 2026
ubuntuUSN-8052-2

Linux kernel (Xilinx) vulnerabilities

Feb 24, 2026
ubuntuUSN-8028-8

Linux kernel (IBM) vulnerabilities

Feb 24, 2026
redhatCVE-2025-38635

kernel: clk: davinci: Add NULL check in davinci_lpsc_clk_register()

Aug 22, 2025
microsoft2025-Aug/CVE-2025-38635

clk: davinci: Add NULL check in davinci_lpsc_clk_register()

Aug 12, 2025

References

git.kernel.org / stable/c/105e8115944a9f93e9412abe7bb07ed96725adf9
Patch
git.kernel.org / stable/c/13de464f445d42738fe18c9a28bab056ba3a290a
Patch
git.kernel.org / stable/c/1d92608a29251278015f57f3572bc950db7519f0
Patch
git.kernel.org / stable/c/23f564326deaafacfd7adf6104755b15216d8320
Patch
git.kernel.org / stable/c/2adc945b70c4d97e9491a6c0c9f3b217a9eecfba
Patch
git.kernel.org / stable/c/6fb19cdcf040e1dec052a9032acb66cc2ad1d43f
Patch
git.kernel.org / stable/c/77e9ad7a2d0e2a771c9e0be04b9d1639413b5f13
Patch
git.kernel.org / stable/c/7843412e5927dafbb844782c56b6380564064109
Patch
git.kernel.org / stable/c/7943ed1f05f5cb7372dca2aa227f848747a98791
Patch
lists.debian.org / debian-lts-announce/2025/10/msg00007.html
Third Party Advisory
lists.debian.org / debian-lts-announce/2025/10/msg00008.html
Third Party Advisory