Use After Free in Linux
CVE-2026-43499
In the Linux kernel, the following vulnerability has been resolved: rtmutex: Use waiter::task instead of current in remove_waiter() remove_waiter() is used by the slowlock paths, but it is also used for proxy-lock rollback in rt_mutex_st…
Vulnerability class: Use-After-Free
EPSS: 0.001 (2.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Linux — versions 6.18.27, 7.1-rc1, 6.1.175
- Linux Linux_kernel
Weakness classification (CWE)
Public proof-of-concept exploits
- x-spy/CVE-2026-43499-popsicle
- MobiusM/CVE-2026-43499
- Linuxoid-cn/Mi8E5-Unlocker-by-CVE-2026-43499
- Linuxoid-cn/CVE-2026-43499-Poc-Analysis
- pubglite55/oppo-ghostlock
- JoinChang/ghostlock-oneplus
- BuSung-dev/Root-My-Galaxy
- Colorful-glassblock/duchamp-root
- BuSung-dev/CVE-2026-43499-S25U
- CakesTwix/Android-CVE-2026-43499
References
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2026-43499?
- CVE-2026-43499 is a high-severity vulnerability in Linux, classified under Use After Free. CVSS score: 7.8/10. Published 2026-05-21.
- How severe is CVE-2026-43499?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2026-43499 known to be exploited?
- 41 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.