Answer in brief
CVE-2026-80718 records a High severity (CVSS 7.8) vulnerability in mm/percpu-km: fix bitmap overflow and accounting in pcpu_create_chunk(). 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 | >=a63d4ac4ab6094c051a5a240260d16117a7a2f86 <5f43d2c1bea280dcdfabaf156c25e7402fb8039f || >=a63d4ac4ab6094c051a5a240260d16117a7a2f86 <92c43ac3c2b09eb16162e8144e73c00b7c3e29d6 || >=a63d4ac4ab6094c051a5a240260d16117a7a2f86 <6fc7da2a052f2825fff785e860e67183f5acaaba || >=a63d4ac4ab6094c051a5a240260d16117a7a2f86 <01504da375f5b19df195cb1cb1cf1dd184318f97 || >=a63d4ac4ab6094c051a5a240260d16117a7a2f86 <a6940b84c8c035da465b7165fdfcfb005545724e || >=a63d4ac4ab6094c051a5a240260d16117a7a2f86 <32134cf9211b83bed9076d0739c5906fbea4c763 || >=a63d4ac4ab6094c051a5a240260d16117a7a2f86 <5c7fc39bf19abb38a996aaad77b3e3a8f48581c3 || >=a63d4ac4ab6094c051a5a240260d16117a7a2f86 <89b1b79c308818a715e75f28744b70d8940a07c9 | 5f43d2c1bea280dcdfabaf156c25e7402fb8039f, 92c43ac3c2b09eb16162e8144e73c00b7c3e29d6, 6fc7da2a052f2825fff785e860e67183f5acaaba, 01504da375f5b19df195cb1cb1cf1dd184318f97, a6940b84c8c035da465b7165fdfcfb005545724e, 32134cf9211b83bed9076d0739c5906fbea4c763, 5c7fc39bf19abb38a996aaad77b3e3a8f48581c3, 89b1b79c308818a715e75f28744b70d8940a07c9 |
| Linux/Linuxgeneric | 3.18 | Not reported |
Published upstream
Aug 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 29, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 28, 2026
In the Linux kernel, the following vulnerability has been resolved: mm/percpu-km: fix bitmap overflow and accounting in pcpu_create_chunk() In pcpu_create_chunk(), nr_pages is the total contiguous backing allocation, i.e., nr_units * pcpu_unit_pages, but pcpu_chunk_populated() uses it to set chunk->populated, whose size is pcpu_unit_pages, bitmap. Since bit N in chunk->populated means page offset N inside every unit is backed. When nr_units > 1, the function writes beyond chunk->populated. Fix it by using chunk->nr_pages. It also fixes the global pcpu_nr_empty_pop_pages accounting, since pcpu_balance_free() only iterates up to chunk->nr_pages. Commit a63d4ac4ab609 ("percpu: make percpu-km set chunk->populated bitmap properly") introduced the bitmap overflow issue. Later, commit b539b87fed37f ("percpu: implmeent pcpu_nr_empty_pop_pages and chunk->nr_populated") added pcpu_nr_empty_pop_pages and caused the accounting issue.
Quoted source text, attributed separately from HOL analysis.