CVE-2026-43484
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
36/100
Published: 2026-05-13
Modified: 2026-11-06
First seen: 2026-11-06
Status: active
Attack Surface
Low Complexity
No Interaction
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
None
I:
None
A:
High
Description
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.
Affected Software (10)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | 6c0cedd1ef9527ef13e66875746570e76a3188a7 < 41dce4dae583a8ce06a7ebf4ce704c46a142957c |
| Linux | Linux | 6c0cedd1ef9527ef13e66875746570e76a3188a7 < bb7fc2498c3bb25fa6a91f22f4760005325cfbd5 |
| Linux | Linux | 6c0cedd1ef9527ef13e66875746570e76a3188a7 < 270277c2ab631044867adb1bd2f2433d3892de6e |
| Linux | Linux | 6c0cedd1ef9527ef13e66875746570e76a3188a7 < 45038e03f15e992c48603fff8c6b1c9be5397ac9 |
| Linux | Linux | 6c0cedd1ef9527ef13e66875746570e76a3188a7 < 0e06cc511c61cff1591e5435a207759adcc76b6d |
| Linux | Linux | 6c0cedd1ef9527ef13e66875746570e76a3188a7 < d3a3caf44c8ec26f5d63dc17c1c7242effa60ebc |
| Linux | Linux | 6c0cedd1ef9527ef13e66875746570e76a3188a7 < 901084c51a0a8fb42a3f37d2e9c62083c495f824 |
| Linux | Linux | 4.15 |
| linux | linux_kernel | 4.15 – 5.15.203 |
| linux | linux_kernel | 7.0 |