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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-43484

mmc: core: Avoid bitfield RMW for claim/retune flags

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Status
Published
Published
Updated
Assigning organization
Linux

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 products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 6c0cedd1ef9527ef13e66875746570e76a3188a7 to < 41dce4dae583a8ce06a7ebf4ce704c46a142957caffected
  • 6c0cedd1ef9527ef13e66875746570e76a3188a7 to < bb7fc2498c3bb25fa6a91f22f4760005325cfbd5affected
  • 6c0cedd1ef9527ef13e66875746570e76a3188a7 to < 270277c2ab631044867adb1bd2f2433d3892de6eaffected
  • 6c0cedd1ef9527ef13e66875746570e76a3188a7 to < 45038e03f15e992c48603fff8c6b1c9be5397ac9affected
  • 6c0cedd1ef9527ef13e66875746570e76a3188a7 to < 0e06cc511c61cff1591e5435a207759adcc76b6daffected
  • 6c0cedd1ef9527ef13e66875746570e76a3188a7 to < d3a3caf44c8ec26f5d63dc17c1c7242effa60ebcaffected
  • 6c0cedd1ef9527ef13e66875746570e76a3188a7 to < 901084c51a0a8fb42a3f37d2e9c62083c495f824affected

Linux Linux

Default version status: affected

  • 4.15affected
  • 0 to < 4.15unaffected
  • 5.15.203 to ≤ 5.15.*unaffected
  • 6.1.167 to ≤ 6.1.*unaffected
  • 6.6.130 to ≤ 6.6.*unaffected
  • 6.12.78 to ≤ 6.12.*unaffected
  • 6.18.19 to ≤ 6.18.*unaffected
  • 6.19.9 to ≤ 6.19.*unaffected
  • 7.0 to ≤ *unaffected

References