Answer in brief
CVE-2026-43484 records a Medium severity (CVSS 5.5) vulnerability in mmc: core: Avoid bitfield RMW for claim/retune flags. 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.
Answer in brief
CVE-2026-43484 records a Medium severity (CVSS 5.5) vulnerability in mmc: core: Avoid bitfield RMW for claim/retune flags. 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 5.5. 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 | >=6c0cedd1ef9527ef13e66875746570e76a3188a7 <41dce4dae583a8ce06a7ebf4ce704c46a142957c || >=6c0cedd1ef9527ef13e66875746570e76a3188a7 <bb7fc2498c3bb25fa6a91f22f4760005325cfbd5 || >=6c0cedd1ef9527ef13e66875746570e76a3188a7 <270277c2ab631044867adb1bd2f2433d3892de6e || >=6c0cedd1ef9527ef13e66875746570e76a3188a7 <45038e03f15e992c48603fff8c6b1c9be5397ac9 || >=6c0cedd1ef9527ef13e66875746570e76a3188a7 <0e06cc511c61cff1591e5435a207759adcc76b6d || >=6c0cedd1ef9527ef13e66875746570e76a3188a7 <d3a3caf44c8ec26f5d63dc17c1c7242effa60ebc || >=6c0cedd1ef9527ef13e66875746570e76a3188a7 <901084c51a0a8fb42a3f37d2e9c62083c495f824 | 41dce4dae583a8ce06a7ebf4ce704c46a142957c, bb7fc2498c3bb25fa6a91f22f4760005325cfbd5, 270277c2ab631044867adb1bd2f2433d3892de6e, 45038e03f15e992c48603fff8c6b1c9be5397ac9, 0e06cc511c61cff1591e5435a207759adcc76b6d, d3a3caf44c8ec26f5d63dc17c1c7242effa60ebc, 901084c51a0a8fb42a3f37d2e9c62083c495f824 |
| Linux/Linuxgeneric | 4.15 | Not reported |
Published upstream
May 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 26, 2026
In the Linux kernel, the following vulnerability has been resolved: mmc: core: Avoid bitfield RMW for claim/retune flags Move claimed and retune control flags out of the bitfield word to avoid unrelated RMW side effects in asynchronous contexts. The host->claimed bit shared a word with retune flags. Writes to claimed in __mmc_claim_host() or retune_now in mmc_mq_queue_rq() can overwrite other bits when concurrent updates happen in other contexts, triggering spurious WARN_ON(!host->claimed). Convert claimed, can_retune, retune_now and retune_paused to bool to remove shared-word coupling.
Quoted source text, attributed separately from HOL analysis.
CVSS is 5.5. 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 | >=6c0cedd1ef9527ef13e66875746570e76a3188a7 <41dce4dae583a8ce06a7ebf4ce704c46a142957c || >=6c0cedd1ef9527ef13e66875746570e76a3188a7 <bb7fc2498c3bb25fa6a91f22f4760005325cfbd5 || >=6c0cedd1ef9527ef13e66875746570e76a3188a7 <270277c2ab631044867adb1bd2f2433d3892de6e || >=6c0cedd1ef9527ef13e66875746570e76a3188a7 <45038e03f15e992c48603fff8c6b1c9be5397ac9 || >=6c0cedd1ef9527ef13e66875746570e76a3188a7 <0e06cc511c61cff1591e5435a207759adcc76b6d || >=6c0cedd1ef9527ef13e66875746570e76a3188a7 <d3a3caf44c8ec26f5d63dc17c1c7242effa60ebc || >=6c0cedd1ef9527ef13e66875746570e76a3188a7 <901084c51a0a8fb42a3f37d2e9c62083c495f824 | 41dce4dae583a8ce06a7ebf4ce704c46a142957c, bb7fc2498c3bb25fa6a91f22f4760005325cfbd5, 270277c2ab631044867adb1bd2f2433d3892de6e, 45038e03f15e992c48603fff8c6b1c9be5397ac9, 0e06cc511c61cff1591e5435a207759adcc76b6d, d3a3caf44c8ec26f5d63dc17c1c7242effa60ebc, 901084c51a0a8fb42a3f37d2e9c62083c495f824 |
| Linux/Linuxgeneric | 4.15 | Not reported |
Published upstream
May 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 26, 2026
In the Linux kernel, the following vulnerability has been resolved: mmc: core: Avoid bitfield RMW for claim/retune flags Move claimed and retune control flags out of the bitfield word to avoid unrelated RMW side effects in asynchronous contexts. The host->claimed bit shared a word with retune flags. Writes to claimed in __mmc_claim_host() or retune_now in mmc_mq_queue_rq() can overwrite other bits when concurrent updates happen in other contexts, triggering spurious WARN_ON(!host->claimed). Convert claimed, can_retune, retune_now and retune_paused to bool to remove shared-word coupling.
Quoted source text, attributed separately from HOL analysis.