# CVE-2026-74405: OPP: Fix race between OPP addition and lookup CVE-2026-74405 is fixed in 38 products on 1 platform, first by DEBIAN-CVE-2026-74405, released August 15, 2026. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2026-74405 - Priority: High - CVSS: 7.8 (Moderate) - EPSS: 0.0013 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Aug 15, 2026 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74405 ## Description In the Linux kernel, the following vulnerability has been resolved: OPP: Fix race between OPP addition and lookup A race exists between dev_pm_opp_add_dynamic() and dev_pm_opp_find_freq_exact(): CPU0 (add) CPU1 (lookup) ------------------------------- ------------------------------ _opp_add() mutex_lock() list_add(&new_opp->node, head) mutex_unlock() _opp_table_find_key() mutex_lock() dev_pm_opp_get(opp) kref_get() mutex_unlock() kref_init(&new_opp->kref) dev_pm_opp_put() kref_put_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 ->opp_table before making the OPP visible via list_add(). This ensures any concurrent lookup observes a fully initialized object. [ Viresh: Updated commit log ] ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | bpftool6.12 amzn 2023 | 1:6.12.103-129.197.amzn2023 | [ALAS2023-2026-3103](https://patchblox.com/security/data/fix/linux/alas2023-2026-3103.md) | Sep 18, 2026 | | Linux | bpftool6.12-debuginfo amzn 2023 | 1:6.12.103-129.197.amzn2023 | [ALAS2023-2026-3103](https://patchblox.com/security/data/fix/linux/alas2023-2026-3103.md) | Sep 18, 2026 | | Linux | bpftool6.18 amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 | | Linux | bpftool6.18-debuginfo amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 | | Linux | kernel-livepatch-6.12.103-129.197 amzn 2023 | 1:1.0-0.amzn2023 | [ALAS2023-2026-3103](https://patchblox.com/security/data/fix/linux/alas2023-2026-3103.md) | Sep 18, 2026 | | Linux | kernel-livepatch-6.18.41-94.142 amzn 2023 | 1:1.0-0.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 | | Linux | kernel6.12 amzn 2023 | 1:6.12.103-129.197.amzn2023 | [ALAS2023-2026-3103](https://patchblox.com/security/data/fix/linux/alas2023-2026-3103.md) | Sep 18, 2026 | | Linux | kernel6.12-debuginfo amzn 2023 | 1:6.12.103-129.197.amzn2023 | [ALAS2023-2026-3103](https://patchblox.com/security/data/fix/linux/alas2023-2026-3103.md) | Sep 18, 2026 | | Linux | kernel6.12-debuginfo-common-aarch64 amzn 2023 | 1:6.12.103-129.197.amzn2023 | [ALAS2023-2026-3103](https://patchblox.com/security/data/fix/linux/alas2023-2026-3103.md) | Sep 18, 2026 | | Linux | kernel6.12-debuginfo-common-x86_64 amzn 2023 | 1:6.12.103-129.197.amzn2023 | [ALAS2023-2026-3103](https://patchblox.com/security/data/fix/linux/alas2023-2026-3103.md) | Sep 18, 2026 | | Linux | kernel6.12-devel amzn 2023 | 1:6.12.103-129.197.amzn2023 | [ALAS2023-2026-3103](https://patchblox.com/security/data/fix/linux/alas2023-2026-3103.md) | Sep 18, 2026 | | Linux | kernel6.12-headers amzn 2023 | 1:6.12.103-129.197.amzn2023 | [ALAS2023-2026-3103](https://patchblox.com/security/data/fix/linux/alas2023-2026-3103.md) | Sep 18, 2026 | | Linux | kernel6.12-modules-extra amzn 2023 | 1:6.12.103-129.197.amzn2023 | [ALAS2023-2026-3103](https://patchblox.com/security/data/fix/linux/alas2023-2026-3103.md) | Sep 18, 2026 | | Linux | kernel6.12-modules-extra-common amzn 2023 | 1:6.12.103-129.197.amzn2023 | [ALAS2023-2026-3103](https://patchblox.com/security/data/fix/linux/alas2023-2026-3103.md) | Sep 18, 2026 | | Linux | kernel6.12-tools amzn 2023 | 1:6.12.103-129.197.amzn2023 | [ALAS2023-2026-3103](https://patchblox.com/security/data/fix/linux/alas2023-2026-3103.md) | Sep 18, 2026 | | Linux | kernel6.12-tools-debuginfo amzn 2023 | 1:6.12.103-129.197.amzn2023 | [ALAS2023-2026-3103](https://patchblox.com/security/data/fix/linux/alas2023-2026-3103.md) | Sep 18, 2026 | | Linux | kernel6.12-tools-devel amzn 2023 | 1:6.12.103-129.197.amzn2023 | [ALAS2023-2026-3103](https://patchblox.com/security/data/fix/linux/alas2023-2026-3103.md) | Sep 18, 2026 | | Linux | kernel6.18 amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 | | Linux | kernel6.18-debuginfo amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 | | Linux | kernel6.18-debuginfo-common-aarch64 amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 | | Linux | kernel6.18-debuginfo-common-x86_64 amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 | | Linux | kernel6.18-devel amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 | | Linux | kernel6.18-headers amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 | | Linux | kernel6.18-modules-extra amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 | | Linux | kernel6.18-modules-extra-common amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 | | Linux | kernel6.18-tools amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 | | Linux | kernel6.18-tools-debuginfo amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 | | Linux | kernel6.18-tools-devel amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 | | Linux | linux Debian 13.5 (trixie) | 6.12.115-2 | [DEBIAN-CVE-2026-74405](https://patchblox.com/security/data/fix/linux/debian-cve-2026-74405.md) | Aug 15, 2026 | | Linux | linux Debian 14 | 7.1.5-1 | [DEBIAN-CVE-2026-74405](https://patchblox.com/security/data/fix/linux/debian-cve-2026-74405.md) | Aug 15, 2026 | | Linux | microvm-kernel6.18 amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 | | Linux | perf6.12 amzn 2023 | 1:6.12.103-129.197.amzn2023 | [ALAS2023-2026-3103](https://patchblox.com/security/data/fix/linux/alas2023-2026-3103.md) | Sep 18, 2026 | | Linux | perf6.12-debuginfo amzn 2023 | 1:6.12.103-129.197.amzn2023 | [ALAS2023-2026-3103](https://patchblox.com/security/data/fix/linux/alas2023-2026-3103.md) | Sep 18, 2026 | | Linux | perf6.18 amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 | | Linux | perf6.18-debuginfo amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 | | Linux | python3-perf6.12 amzn 2023 | 1:6.12.103-129.197.amzn2023 | [ALAS2023-2026-3103](https://patchblox.com/security/data/fix/linux/alas2023-2026-3103.md) | Sep 18, 2026 | | Linux | python3-perf6.12-debuginfo amzn 2023 | 1:6.12.103-129.197.amzn2023 | [ALAS2023-2026-3103](https://patchblox.com/security/data/fix/linux/alas2023-2026-3103.md) | Sep 18, 2026 | | Linux | python3-perf6.18 amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 | | Linux | python3-perf6.18-debuginfo amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 | --- Data as of 2026-11-08T13:06:02Z UTC. 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