AZL-96045
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-96045.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-96045
- Upstream
- Published
- 2026-08-15T06:22:42Z
- Modified
- 2026-08-29T05:27:27Z
- Summary
- CVE-2026-74405 affecting package kernel 6.6.150.1-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
OPP: Fix race between OPP addition and lookup
A race exists between devpmoppadddynamic() and devpmoppfindfreq_exact():
CPU0 (add) CPU1 (lookup) ------------------------------- ------------------------------ oppadd() mutexlock() listadd(&newopp->node, head) mutexunlock() opptablefindkey() mutexlock() devpmoppget(opp) krefget() mutexunlock() krefinit(&newopp->kref) devpmoppput() krefput_mutex()
The newly added OPP is inserted into the list before its kref is initialized. A concurrent lookup can find this OPP and increment its reference count while it is still uninitialized, leading to refcount corruption and a potential premature free.
Fix this by initializing ->kref and ->opptable before making the OPP visible via listadd(). This ensures any concurrent lookup observes a fully initialized object.
[ Viresh: Updated commit log ]
- References