CVE-2026-43484In 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 unrela…
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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.
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 26, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
linux linux_kernel linux:linux_kernel | from 4.15 before 5.15.203; from 5.16 before 6.1.167; from 6.2 before 6.6.130; from 6.7 before 6.12.78; from 6.13 before 6.18.19; from 6.19 before 6.19.9; 7.0 | NVD |
References
- https://git.kernel.org/stable/c/0e06cc511c61cff1591e5435a207759adcc76b6dpatch
- https://git.kernel.org/stable/c/270277c2ab631044867adb1bd2f2433d3892de6epatch
- https://git.kernel.org/stable/c/41dce4dae583a8ce06a7ebf4ce704c46a142957cpatch
- https://git.kernel.org/stable/c/45038e03f15e992c48603fff8c6b1c9be5397ac9patch
- https://git.kernel.org/stable/c/901084c51a0a8fb42a3f37d2e9c62083c495f824patch
- https://git.kernel.org/stable/c/bb7fc2498c3bb25fa6a91f22f4760005325cfbd5patch
- https://git.kernel.org/stable/c/d3a3caf44c8ec26f5d63dc17c1c7242effa60ebcpatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.