Answer in brief
CVE-2026-72073 records a Unknown severity vulnerability in mmc: vub300: fix use-after-free on probe failure. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=0613ad2401f88bdeae5594c30afe318e93b14676 <5b82af744e06cd741938c3da54fdbe564a7e52d9 || >=0613ad2401f88bdeae5594c30afe318e93b14676 <618cf6b139503ec18ef93ffd663396aaf99b763a || >=0613ad2401f88bdeae5594c30afe318e93b14676 <a3b5f242997a3be7404112fd48784881560aea57 || 41ed46bdbd2878cd6567abe0974a445f8b1b8ec8 || 25f05d762ca5e1c685002a53dd44f68e78ca3feb || a46e681151bbdacdf6b89ee8c4e5bad0555142bb || 3b29f8769d32016b2d89183db4d80c7a71b7e35e || 3049a3b927a40d89d4582ff1033cd7953be773c7 || afc898019e7bf18c5eb7a0ac19852fcb1b341b3c || c9e85979b59cb86f0a15defa8199d740e2b36b90 || 2044b2ea77945f372ef161d1bbf814e471767ff2 || >=4.9.337 <4.10 || >=4.14.303 <4.15 || >=4.19.270 <4.20 || >=5.4.229 <5.5 || >=5.10.163 <5.11 || >=5.15.86 <5.16 || >=6.0.16 <6.1 || >=6.1.2 <6.2 | 5b82af744e06cd741938c3da54fdbe564a7e52d9, 618cf6b139503ec18ef93ffd663396aaf99b763a, a3b5f242997a3be7404112fd48784881560aea57, 4.10, 4.15, 4.20, 5.5, 5.11, 5.16, 6.1, 6.2 |
| Linux/Linuxgeneric | 6.2 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: mmc: vub300: fix use-after-free on probe failure The vub300 driver lifetime-manages its controller state using vub300->kref, with vub300_delete() freeing the mmc host when the last reference is dropped. The probe error path after the inactivity timer has been armed still bypasses that lifetime rule, however, and falls through to mmc_free_host() directly if mmc_add_host() fails. The race window is between arming the inactivity timer and reaching the probe error unwind after mmc_add_host() fails: probe thread timer/workqueue ------------ --------------- kref_init(&vub300->kref) ref = 1 kref_get(&vub300->kref) ref = 2, timer ref add_timer(inactivity_timer) fires after one second | | race window |<----------------------------------------------------> | mmc_add_host(mmc) inactivity timer fires vub300_queue_dead_work() kref_get() ref = 3 queue_work(deadwork) mmc_add_host() fails timer_delete_sync() mmc_free_host(mmc) frees vub300 deadwork runs use-after-free The inactivity timeout is one second, so this would require mmc_add_host() to both fail and take more than one second to do so. This is unlikely to happen in practice, but the error path is still wrong. timer_delete_sync() only waits for the timer callback itself. It does not flush deadwork that the callback may already have queued. As a result, queued deadwork can still hold a kref while the probe error path directly frees the backing mmc host, including the vub300 storage. Fix this by using the same lifetime mechanism as disconnect. Clear vub300->interface so that the timer callback and any queued deadwork return early and drop their references, then drop the initial probe reference and return without falling through to err_free_host.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-72073 records a Unknown severity vulnerability in mmc: vub300: fix use-after-free on probe failure. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=0613ad2401f88bdeae5594c30afe318e93b14676 <5b82af744e06cd741938c3da54fdbe564a7e52d9 || >=0613ad2401f88bdeae5594c30afe318e93b14676 <618cf6b139503ec18ef93ffd663396aaf99b763a || >=0613ad2401f88bdeae5594c30afe318e93b14676 <a3b5f242997a3be7404112fd48784881560aea57 || 41ed46bdbd2878cd6567abe0974a445f8b1b8ec8 || 25f05d762ca5e1c685002a53dd44f68e78ca3feb || a46e681151bbdacdf6b89ee8c4e5bad0555142bb || 3b29f8769d32016b2d89183db4d80c7a71b7e35e || 3049a3b927a40d89d4582ff1033cd7953be773c7 || afc898019e7bf18c5eb7a0ac19852fcb1b341b3c || c9e85979b59cb86f0a15defa8199d740e2b36b90 || 2044b2ea77945f372ef161d1bbf814e471767ff2 || >=4.9.337 <4.10 || >=4.14.303 <4.15 || >=4.19.270 <4.20 || >=5.4.229 <5.5 || >=5.10.163 <5.11 || >=5.15.86 <5.16 || >=6.0.16 <6.1 || >=6.1.2 <6.2 | 5b82af744e06cd741938c3da54fdbe564a7e52d9, 618cf6b139503ec18ef93ffd663396aaf99b763a, a3b5f242997a3be7404112fd48784881560aea57, 4.10, 4.15, 4.20, 5.5, 5.11, 5.16, 6.1, 6.2 |
| Linux/Linuxgeneric | 6.2 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: mmc: vub300: fix use-after-free on probe failure The vub300 driver lifetime-manages its controller state using vub300->kref, with vub300_delete() freeing the mmc host when the last reference is dropped. The probe error path after the inactivity timer has been armed still bypasses that lifetime rule, however, and falls through to mmc_free_host() directly if mmc_add_host() fails. The race window is between arming the inactivity timer and reaching the probe error unwind after mmc_add_host() fails: probe thread timer/workqueue ------------ --------------- kref_init(&vub300->kref) ref = 1 kref_get(&vub300->kref) ref = 2, timer ref add_timer(inactivity_timer) fires after one second | | race window |<----------------------------------------------------> | mmc_add_host(mmc) inactivity timer fires vub300_queue_dead_work() kref_get() ref = 3 queue_work(deadwork) mmc_add_host() fails timer_delete_sync() mmc_free_host(mmc) frees vub300 deadwork runs use-after-free The inactivity timeout is one second, so this would require mmc_add_host() to both fail and take more than one second to do so. This is unlikely to happen in practice, but the error path is still wrong. timer_delete_sync() only waits for the timer callback itself. It does not flush deadwork that the callback may already have queued. As a result, queued deadwork can still hold a kref while the probe error path directly frees the backing mmc host, including the vub300 storage. Fix this by using the same lifetime mechanism as disconnect. Clear vub300->interface so that the timer callback and any queued deadwork return early and drop their references, then drop the initial probe reference and return without falling through to err_free_host.
Quoted source text, attributed separately from HOL analysis.