Answer in brief
CVE-2026-89953 records a Unknown severity vulnerability in mtd: mtdoops: free page bitmap when the backing MTD is removed. 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 | >=be95745f01677245a061a8f51473ef5ec8ad008e <477d61d54e097e90f748aa18d013805abd56bcbd || >=be95745f01677245a061a8f51473ef5ec8ad008e <a91ac71e67c3e01ed9afd9841435bebb930293f8 || >=be95745f01677245a061a8f51473ef5ec8ad008e <698944132083d143ef965c0090ee14ba1d9e1a5f || >=be95745f01677245a061a8f51473ef5ec8ad008e <f25c804947e0a28c15e73da8e2e0db959cbed716 || >=be95745f01677245a061a8f51473ef5ec8ad008e <8414f0e9f707226de20b48c7048179fd86d352fc || >=be95745f01677245a061a8f51473ef5ec8ad008e <d06f91a52af11630c9f7e487f6daf242ac310cb8 || >=be95745f01677245a061a8f51473ef5ec8ad008e <1e5cd8bc902331ff801df88cbb299029ae062753 || >=be95745f01677245a061a8f51473ef5ec8ad008e <956e7da12c114f13c63d126ab1d79c3b6a819060 | 477d61d54e097e90f748aa18d013805abd56bcbd, a91ac71e67c3e01ed9afd9841435bebb930293f8, 698944132083d143ef965c0090ee14ba1d9e1a5f, f25c804947e0a28c15e73da8e2e0db959cbed716, 8414f0e9f707226de20b48c7048179fd86d352fc, d06f91a52af11630c9f7e487f6daf242ac310cb8, 1e5cd8bc902331ff801df88cbb299029ae062753, 956e7da12c114f13c63d126ab1d79c3b6a819060 |
| Linux/Linuxgeneric | 2.6.33 | Not reported |
Published upstream
Sep 16, 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 16, 2026
In the Linux kernel, the following vulnerability has been resolved: mtd: mtdoops: free page bitmap when the backing MTD is removed mtdoops_notify_add() allocates oops_page_used when the configured MTD device is registered. mtdoops_notify_remove() detaches from that device but leaves the bitmap allocated. If the same MTD device is later registered again, the add path allocates a new bitmap and overwrites the old pointer, leaking one vmalloc allocation per remove/add cycle. This is only visible when the backing MTD device can disappear and be registered again while mtdoops remains loaded, so the usual static MTD case does not expose it. Free the bitmap after unregistering the dumper and flushing the pending workers, then clear the pointer and page count before a later attach can allocate fresh state. Clearing the pointer also keeps the module exit path from freeing the same bitmap a second time after a remove event.
Quoted source text, attributed separately from HOL analysis.