Answer in brief
CVE-2026-93045 records a High severity (CVSS 7.8) vulnerability in bpf: Reject arena frees below the arena base. 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 7.8. 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 | >=317460317a02a1af512697e6e964298dedd8a163 <90453eaf8f14e7be0ab03983f2a93aeb6b990a58 || >=317460317a02a1af512697e6e964298dedd8a163 <a968dffa5ab3c74d2ebb3a6233bf8b843f0bfc20 || >=317460317a02a1af512697e6e964298dedd8a163 <8a08635656037aee9c12231ed384449c4ffb1a93 || >=317460317a02a1af512697e6e964298dedd8a163 <b5a71cb2db6d84ac0042549dcec266b18429d41e | 90453eaf8f14e7be0ab03983f2a93aeb6b990a58, a968dffa5ab3c74d2ebb3a6233bf8b843f0bfc20, 8a08635656037aee9c12231ed384449c4ffb1a93, b5a71cb2db6d84ac0042549dcec266b18429d41e |
| Linux/Linuxgeneric | 6.9 | Not reported |
Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 17, 2026
In the Linux kernel, the following vulnerability has been resolved: bpf: Reject arena frees below the arena base bpf_arena_free_pages() accepts scalar arena addresses. The runtime masks the address to the low 32 bits and reconstructs a full user address from the arena base before returning the range to the arena free tree. When the scalar value is below the low 32 bits of the arena base, full_uaddr falls below user_vm_start. The existing upper-end clipping then turns this into an out-of-range free-tree offset. A later allocation can reuse that offset and return an address below the arena mapping. Reject such frees before computing the clipped range.
Quoted source text, attributed separately from HOL analysis.