{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-72073", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-72073", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-08-15T05:52:24.676Z", "updatedAt": "2026-10-21T12:44:20.898Z", "importedAt": "2026-10-24T01:58:25.636Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "mmc: vub300: fix use-after-free on probe failure", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: vub300: fix use-after-free on probe failure\n\nThe vub300 driver lifetime-manages its controller state using\nvub300->kref, with vub300_delete() freeing the mmc host when the last\nreference is dropped. The probe error path after the inactivity timer has\nbeen armed still bypasses that lifetime rule, however, and falls through\nto mmc_free_host() directly if mmc_add_host() fails.\n\nThe race window is between arming the inactivity timer and reaching the\nprobe error unwind after mmc_add_host() fails:\n\n probe thread timer/workqueue\n ------------ ---------------\n kref_init(&vub300->kref) ref = 1\n kref_get(&vub300->kref) ref = 2, timer ref\n add_timer(inactivity_timer) fires after one second\n |\n | race window\n |<---------------------------------------------------->\n |\n mmc_add_host(mmc)\n inactivity timer fires\n vub300_queue_dead_work()\n kref_get() ref = 3\n queue_work(deadwork)\n mmc_add_host() fails\n timer_delete_sync()\n mmc_free_host(mmc)\n frees vub300\n deadwork runs\n use-after-free\n\nThe inactivity timeout is one second, so this would require\nmmc_add_host() to both fail and take more than one second to do so. This\nis unlikely to happen in practice, but the error path is still wrong.\n\ntimer_delete_sync() only waits for the timer callback itself. It does\nnot flush deadwork that the callback may already have queued. As a\nresult, queued deadwork can still hold a kref while the probe error path\ndirectly frees the backing mmc host, including the vub300 storage.\n\nFix this by using the same lifetime mechanism as disconnect. Clear\nvub300->interface so that the timer callback and any queued deadwork\nreturn early and drop their references, then drop the initial probe\nreference and return without falling through to err_free_host.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "0613ad2401f88bdeae5594c30afe318e93b14676", "status": "affected", "versionType": "git", "lessThan": "face65f80c6946c631ca3490b4ebd2c016a4fd2c" }, { "version": "0613ad2401f88bdeae5594c30afe318e93b14676", "status": "affected", "versionType": "git", "lessThan": "6c66653dac9b25272d5fd4ed42a34aa5249e16df" }, { "version": "0613ad2401f88bdeae5594c30afe318e93b14676", "status": "affected", "versionType": "git", "lessThan": "5b82af744e06cd741938c3da54fdbe564a7e52d9" }, { "version": "0613ad2401f88bdeae5594c30afe318e93b14676", "status": "affected", "versionType": "git", "lessThan": "618cf6b139503ec18ef93ffd663396aaf99b763a" }, { "version": "0613ad2401f88bdeae5594c30afe318e93b14676", "status": "affected", "versionType": "git", "lessThan": "a3b5f242997a3be7404112fd48784881560aea57" }, { "version": "41ed46bdbd2878cd6567abe0974a445f8b1b8ec8", "status": "affected", "versionType": "git" }, { "version": "25f05d762ca5e1c685002a53dd44f68e78ca3feb", "status": "affected", "versionType": "git" }, { "version": "a46e681151bbdacdf6b89ee8c4e5bad0555142bb", "status": "affected", "versionType": "git" }, { "version": "3b29f8769d32016b2d89183db4d80c7a71b7e35e", "status": "affected", "versionType": "git" }, { "version": "3049a3b927a40d89d4582ff1033cd7953be773c7", "status": "affected", "versionType": "git" }, { "version": "afc898019e7bf18c5eb7a0ac19852fcb1b341b3c", "status": "affected", "versionType": "git" }, { "version": "c9e85979b59cb86f0a15defa8199d740e2b36b90", "status": "affected", "versionType": "git" }, { "version": "2044b2ea77945f372ef161d1bbf814e471767ff2", "status": "affected", "versionType": "git" }, { "version": "4.9.337", "status": "affected", "versionType": "semver", "lessThan": "4.10" }, { "version": "4.14.303", "status": "affected", "versionType": "semver", "lessThan": "4.15" }, { "version": "4.19.270", "status": "affected", "versionType": "semver", "lessThan": "4.20" }, { "version": "5.4.229", "status": "affected", "versionType": "semver", "lessThan": "5.5" }, { "version": "5.10.163", "status": "affected", "versionType": "semver", "lessThan": "5.11" }, { "version": "5.15.86", "status": "affected", "versionType": "semver", "lessThan": "5.16" }, { "version": "6.0.16", "status": "affected", "versionType": "semver", "lessThan": "6.1" }, { "version": "6.1.2", "status": "affected", "versionType": "semver", "lessThan": "6.2" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.2", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.2" }, { "version": "6.6.160", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.114", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.42", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.1.5", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.1.*" }, { "version": "7.2", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }