Answer in brief
CVE-2026-93049 records a Unknown severity vulnerability in mtd: mtdswap: Avoid freeing registered blktrans device twice. 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 | >=e8e3edb95ce6a146bc774b6cfad3553f4383edc8 <ecadb9137aeaa0615183f8d23eabea2b45c862f1 || >=e8e3edb95ce6a146bc774b6cfad3553f4383edc8 <eec130fc9ffbbd08a5d5432683122b79aca2a726 || >=e8e3edb95ce6a146bc774b6cfad3553f4383edc8 <d5086911d532b82ca070d944aa08ddde00baefe4 || >=e8e3edb95ce6a146bc774b6cfad3553f4383edc8 <0ce48c6ddea1a8e675a2eb0221b62a9950788f3c || >=e8e3edb95ce6a146bc774b6cfad3553f4383edc8 <a82d93fcfdfd26af17049c34319dfdd079cd1901 || >=e8e3edb95ce6a146bc774b6cfad3553f4383edc8 <5c349c533e72af2313c3be0f80a24d7407fa4777 || >=e8e3edb95ce6a146bc774b6cfad3553f4383edc8 <37be7bc2c2d09c18e939da20224405864a0090b9 || >=e8e3edb95ce6a146bc774b6cfad3553f4383edc8 <779aa4c66a96bf43d2d62982ea1a9096a9128d87 | ecadb9137aeaa0615183f8d23eabea2b45c862f1, eec130fc9ffbbd08a5d5432683122b79aca2a726, d5086911d532b82ca070d944aa08ddde00baefe4, 0ce48c6ddea1a8e675a2eb0221b62a9950788f3c, a82d93fcfdfd26af17049c34319dfdd079cd1901, 5c349c533e72af2313c3be0f80a24d7407fa4777, 37be7bc2c2d09c18e939da20224405864a0090b9, 779aa4c66a96bf43d2d62982ea1a9096a9128d87 |
| Linux/Linuxgeneric | 4.14 | Not reported |
Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 17, 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: mtd: mtdswap: Avoid freeing registered blktrans device twice In mtdswap_add_mtd(), debugfs setup failure after successful blktrans registration can free mbd_dev twice. add_mtd_blktrans_dev() initializes the blktrans device reference and publishes the disk. Once that succeeds, del_mtd_blktrans_dev() tears the disk down and drops the blktrans reference; when that reference reaches zero, blktrans_dev_release() frees the mtd_blktrans_dev. The debugfs failure path called del_mtd_blktrans_dev(mbd_dev), then fell through the common cleanup label and called kfree(mbd_dev) again. Clear the local pointer after deregistration so the common cleanup can still release the mtdswap state without freeing the blktrans object twice. This issue was found by a static analysis checker and confirmed by manual source review.
Quoted source text, attributed separately from HOL analysis.