Answer in brief
CVE-2026-98775 records a Unknown severity vulnerability in nitro_enclaves: fix use-after-free on SLOT_ALLOC failure. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), 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), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=9c8eb50fe9e2bb8a2e725979e052fbf592b6b799 <466041d14f26dc2babd606a2e85dce08774112a6 || >=9c8eb50fe9e2bb8a2e725979e052fbf592b6b799 <f7fb6c2835ede1b8ad84cf7e78a528a9d0159b84 || >=9c8eb50fe9e2bb8a2e725979e052fbf592b6b799 <43f78b328f3907ca2f7424e15b7e45ffbf9fe21c || >=9c8eb50fe9e2bb8a2e725979e052fbf592b6b799 <9bc184a2eda8b773c88ecbff934001ad649b9cc1 | 466041d14f26dc2babd606a2e85dce08774112a6, f7fb6c2835ede1b8ad84cf7e78a528a9d0159b84, 43f78b328f3907ca2f7424e15b7e45ffbf9fe21c, 9bc184a2eda8b773c88ecbff934001ad649b9cc1 |
| Linux/Linuxgeneric | 5.10 | Not reported |
| Linux/Linuxgeneric | >=9c8eb50fe9e2bb8a2e725979e052fbf592b6b799 <8bde6f643ab6fe5e3e3f4c312f84ce327ecf39b2 || >=9c8eb50fe9e2bb8a2e725979e052fbf592b6b799 <466041d14f26dc2babd606a2e85dce08774112a6 || >=9c8eb50fe9e2bb8a2e725979e052fbf592b6b799 <f7fb6c2835ede1b8ad84cf7e78a528a9d0159b84 || >=9c8eb50fe9e2bb8a2e725979e052fbf592b6b799 <43f78b328f3907ca2f7424e15b7e45ffbf9fe21c || >=9c8eb50fe9e2bb8a2e725979e052fbf592b6b799 <9bc184a2eda8b773c88ecbff934001ad649b9cc1 | 8bde6f643ab6fe5e3e3f4c312f84ce327ecf39b2, 466041d14f26dc2babd606a2e85dce08774112a6, f7fb6c2835ede1b8ad84cf7e78a528a9d0159b84, 43f78b328f3907ca2f7424e15b7e45ffbf9fe21c, 9bc184a2eda8b773c88ecbff934001ad649b9cc1 |
Published upstream
Oct 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 18, 2026
In the Linux kernel, the following vulnerability has been resolved: nitro_enclaves: fix use-after-free on SLOT_ALLOC failure When ne_create_vm_ioctl() fails the SLOT_ALLOC request after anon_inode_getfile() has succeeded, the error path calls fput(enclave_file) and then frees ne_enclave. In normal userspace context, fput() defers the final __fput() via task_work. ne_enclave_release() therefore runs after ne_enclave has already been freed and dereferences ne_enclave->slot_uid, causing a use-after-free: KASAN: slab-use-after-free in ne_enclave_release. The enclave has no slot allocated and is not yet linked into the enclaves list on this error path, so ne_enclave_release() is expected to return early when slot_uid is zero. However, reading slot_uid already accesses the freed object. Clear enclave_file->private_data before fput() on the error path. ne_enclave_release() then returns immediately when private_data is NULL, leaving the ioctl error path as the sole owner of ne_enclave. This is safe because the file has not been fd_install()'d yet. Tested on an AWS EC2 m5.2xlarge with CONFIG_KASAN=y. Without the patch, the reproducer triggers a KASAN slab-use-after-free on every SLOT_ALLOC failure. With the patch, no KASAN report is produced and the SLOT_ALLOC error is still returned. Normal enclave creation and teardown are unaffected.
Quoted source text, attributed separately from HOL analysis.