Answer in brief
CVE-2026-93238 records a Unknown severity vulnerability in s390/vfio-ap: fix potential use of uninitialized apm_filtered bitmap. 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.
A CVSS score is not reported in the current record. 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.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=eeb386aeb5b7c8d2dae6a3ba49255d8a97803182 <4ba8a08f5f26ed59f356a6318bca3aa7cc0af3e2 || >=eeb386aeb5b7c8d2dae6a3ba49255d8a97803182 <f73db632524320d2b93bc8534be8ea875053502d || >=eeb386aeb5b7c8d2dae6a3ba49255d8a97803182 <6d554f2571e6b4db242593ba561efd6a6d1f99a9 || >=eeb386aeb5b7c8d2dae6a3ba49255d8a97803182 <09548edc6114f1eb1035b30795e893204ef45b85 || >=eeb386aeb5b7c8d2dae6a3ba49255d8a97803182 <bf09b9d7cd7890bc3a3b7eb63d5ece15f88bfde7 | 4ba8a08f5f26ed59f356a6318bca3aa7cc0af3e2, f73db632524320d2b93bc8534be8ea875053502d, 6d554f2571e6b4db242593ba561efd6a6d1f99a9, 09548edc6114f1eb1035b30795e893204ef45b85, bf09b9d7cd7890bc3a3b7eb63d5ece15f88bfde7 |
| Linux/Linuxgeneric | 6.0 | Not reported |
Published upstream
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 25, 2026
In the Linux kernel, the following vulnerability has been resolved: s390/vfio-ap: fix potential use of uninitialized apm_filtered bitmap The DECLARE_BITMAP(apm_filtered, AP_DEVICES) macro allocates the bitmap on the stack without zero-initializing it. In vfio_ap_mdev_hot_plug_cfg(), the vfio_ap_mdev_filter_matrix() function is only called to initialize and populate apm_filtered if either filter_adapters or filter_domains is true. If the hot plug configuration change only adds control domains (meaning filter_cdoms is true, but filter_adapters and filter_domains are both false), vfio_ap_mdev_filter_matrix() is bypassed. Consequently, apm_filtered is passed to reset_queues_for_apids() with uninitialized stack garbage. This can cause reset_queues_for_apids() to interpret arbitrary stack garbage bits as valid APIDs to reset, potentially performing unintended guest hardware queue resets. Fix this by zero-initializing the apm_filtered bitmap at the beginning of vfio_ap_mdev_hot_plug_cfg() using bitmap_zero().
Quoted source text, attributed separately from HOL analysis.