Answer in brief
CVE-2025-38257 records a High severity (CVSS 7.3) vulnerability in s390/pkey: Prevent overflow in size calculation for memdup_user(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.16:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.16:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.16:rc3:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d <ad1bdd24a02d5a8d119af8e4cd50933780a6d29f || >=f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d <faa1ab4a23c42e34dc000ef4977b751d94d5148c || >=f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d <88f3869649edbc4a13f6c2877091f81cd5a50f05 || >=f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d <f855b119e62b004a5044ed565f2a2b368c4d3f16 || >=f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d <73483ca7e07a5e39bdf612eec9d3d293e8bef649 || >=f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d <7360ee47599af91a1d5f4e74d635d9408a54e489 | ad1bdd24a02d5a8d119af8e4cd50933780a6d29f, faa1ab4a23c42e34dc000ef4977b751d94d5148c, 88f3869649edbc4a13f6c2877091f81cd5a50f05, f855b119e62b004a5044ed565f2a2b368c4d3f16, 73483ca7e07a5e39bdf612eec9d3d293e8bef649, 7360ee47599af91a1d5f4e74d635d9408a54e489 |
| Linux/Linuxgeneric | 5.4 | Not reported |
Published upstream
Jul 9, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: s390/pkey: Prevent overflow in size calculation for memdup_user() Number of apqn target list entries contained in 'nr_apqns' variable is determined by userspace via an ioctl call so the result of the product in calculation of size passed to memdup_user() may overflow. In this case the actual size of the allocated area and the value describing it won't be in sync leading to various types of unpredictable behaviour later. Use a proper memdup_array_user() helper which returns an error if an overflow is detected. Note that it is different from when nr_apqns is initially zero - that case is considered valid and should be handled in subsequent pkey_handler implementations. Found by Linux Verification Center (linuxtesting.org).
Quoted source text, attributed separately from HOL analysis.