Security readout for executives and security teams
Plain-English summary
CVE-2025-38581 is a Linux kernel reliability flaw in the AMD CCP crypto driver. On kernels built with CCP debugfs support, rebinding the CCP PCI device can trigger a kernel NULL pointer dereference and crash the system. The sources show a kernel fix, but no KEV listing or cited active exploitation.
Executive priority
Prioritize patching on AMD-based Linux hosts where kernel crashes would disrupt production workloads. This is not currently evidenced as internet-exploited, but it can cause system instability when the affected driver path is exercised.
Technical view
The bug occurs in ccp.ko when CONFIG_CRYPTO_DEV_CCP_DEBUGFS is enabled. After debugfs teardown, ccp_debugfs_dir was not cleared, so a later device rebind could reuse invalid state while recreating debugfs entries, leading to an oops in debugfs_create_dir. The fix sets ccp_debugfs_dir to NULL after destruction.
Likely exposure
Exposure is mainly Linux systems using affected kernels, AMD CCP hardware/driver support, and builds with CONFIG_CRYPTO_DEV_CCP_DEBUGFS enabled. Practical triggering appears tied to local device unbind and bind operations through sysfs, which usually require elevated administrative control.
Exploitation context
The source bundle documents a reproducible crash during CCP PCI device rebind and marks KEV as false. It does not show remote exploitation, privilege escalation, public weaponization, or active exploitation. Treat this primarily as a local denial-of-service and operational stability issue unless vendor advisories add more evidence.
Researcher notes
The affected data is version-oriented and commit references are provided, but the bundle does not include CVSS, CWE, or detailed downstream package mapping. Validation should focus on kernel lineage, CCP driver presence, debugfs configuration, and whether the stable patch was backported by the distribution.
Mitigation direction
- Apply vendor kernel updates containing the referenced stable fixes.
- Review Debian LTS advisories if running Debian LTS kernels.
- Avoid CCP device rebinding on affected systems until patched.
- Restrict administrative access to device-management sysfs paths.
- For custom kernels, review whether CCP debugfs support is required.
Validation and detection
- Inventory kernels against the affected version information in the CVE record.
- Confirm AMD CCP driver usage on systems with relevant hardware.
- Check whether CONFIG_CRYPTO_DEV_CCP_DEBUGFS is enabled in custom builds.
- Verify vendor kernel packages include the ccp_debugfs_dir cleanup fix.
- Review crash logs for CCP rebind-related NULL pointer dereferences.
Public sources used
- CVE Program
- CVE List V5
- Linux stable commit a25ab6dfa0ce
- Linux stable commit ce63a8392596
- Linux stable commit 20c0ed8dd658
- Linux stable commit 2d4060f05e74
- Linux stable commit db1114685317
- Linux stable commit 9dea08eac4f6
- Linux stable commit 6eadf50c1d89
- Linux stable commit 64ec9a7e7a63
- Linux stable commit 181698af38d3
- Debian LTS announcement
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2025-38581 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/a25ab6dfa0ce323ec308966988be6b675eb9d3e5CVE reference, Linux
- https://git.kernel.org/stable/c/ce63a83925964ab7564bd216bd92b80bc365492eCVE reference, Linux
- https://git.kernel.org/stable/c/20c0ed8dd65834e6bab464f54cd6ff68659bacb9CVE reference, Linux
- https://git.kernel.org/stable/c/2d4060f05e74dbee884ba723f6afd9282befc3c5CVE reference, Linux
- https://git.kernel.org/stable/c/db111468531777cac8b4beb6515a88a54b0c4a74CVE reference, Linux
- https://git.kernel.org/stable/c/9dea08eac4f6d6fbbae59992978252e2edab995dCVE reference, Linux
- https://git.kernel.org/stable/c/6eadf50c1d894cb34f3237064063207460946040CVE reference, Linux
- https://git.kernel.org/stable/c/64ec9a7e7a6398b172ab6feba60e952163a1c3d5CVE reference, Linux
- https://git.kernel.org/stable/c/181698af38d3f93381229ad89c09b5bd0496661aCVE reference, Linux
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlCVE reference, CVE
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlCVE reference, CVE
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.