{"cve":"CVE-2026-43484","nvd":{"published":"2026-05-13T16:16:51.623","modified":"2026-06-26T19:27:23.197","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: core: Avoid bitfield RMW for claim/retune flags\n\nMove claimed and retune control flags out of the bitfield word to\navoid unrelated RMW side effects in asynchronous contexts.\n\nThe host->claimed bit shared a word with retune flags. Writes to claimed\nin __mmc_claim_host() or retune_now in mmc_mq_queue_rq() can overwrite\nother bits when concurrent updates happen in other contexts, triggering\nspurious WARN_ON(!host->claimed). Convert claimed, can_retune,\nretune_now and retune_paused to bool to remove shared-word coupling.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/0e06cc511c61cff1591e5435a207759adcc76b6d","https://git.kernel.org/stable/c/270277c2ab631044867adb1bd2f2433d3892de6e","https://git.kernel.org/stable/c/41dce4dae583a8ce06a7ebf4ce704c46a142957c","https://git.kernel.org/stable/c/45038e03f15e992c48603fff8c6b1c9be5397ac9","https://git.kernel.org/stable/c/901084c51a0a8fb42a3f37d2e9c62083c495f824"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:35:16.954578616+00:00"},"epss":{"cve":"CVE-2026-43484","score":0.00114,"percentile":0.01473,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}