CVE-2026-43499
rtmutex: Use waiter::task instead of current in remove_waiter()
Description
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_start_proxy_lock() when invoked from futex_requeue(). In the latter case waiter::task is not current, but remove_waiter() operates on current for the dequeue operation. That results in several problems: 1) the rbtree dequeue happens without waiter::task::pi_lock being held 2) the waiter task's pi_blocked_on state is not cleared, which leaves a dangling pointer primed for UAF around. 3) rt_mutex_adjust_prio_chain() operates on the wrong top priority waiter task Use waiter::task instead of current in all related operations in remove_waiter() to cure those problems. [ tglx: Fixup rt_mutex_adjust_prio_chain(), add a comment and amend the changelog ]
INFO
Published Date :
May 21, 2026, 1:16 p.m.
Last Modified :
July 24, 2026, 3:17 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Update the Linux kernel to the latest patched version.
- Verify the patch is applied to rtmutex operations.
- Review kernel change logs for rtmutex fixes.
- Test system stability after patching.
Public PoC/Exploit Available at Github
CVE-2026-43499 has a 83 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-43499.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-43499 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-43499
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
CVE-2026-43499 PoC Scanner
cve cve-2026-43499 go golang golang-cli linux linux-kernel linux-server poc scanner
Go
OnePlus Ace 3 preload.so for CVE-2026-43499 (GhostLock)
Makefile C Assembly
None
Makefile Python C
Use CVE-2026-43499 on Redmi Turbo 5 to escalate privilege
CVE-2026-43499
C Assembly Makefile
None
Makefile C Assembly
中转
None
Makefile C Assembly Kotlin CMake C++ HTML JavaScript
Sanitized public CI mirror for Lenovo TB322FC Android 15 GKI 6.6.111 ReSukiSU build
C Python Shell HTML JavaScript SCSS Makefile C++ Assembly
CVE-2026-43499-cloudflare-gate签名授权计算
JavaScript HTML CSS
CVE-2026-43499 reproduce in Xiaomi 17T. (kernelsu incomplete)
CVE-2026-43499
Makefile C Assembly
CVE-2026-43499 (IonStack/GhostLock) pure-C re-root POC for Samsung SM-T878U / gts7l (T878USQS8DXE1)
android cve-2026-43499 ghostlock ionstack kernel samsung security-research
Makefile C Assembly Shell
（CVE-2026-43499）内核漏洞利用程序，适用于未解锁 Bootloader 的一加设备。
C Makefile Python
Use CVE-2026-43499 to disable SELinux on Android
Makefile C
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-43499 vulnerability anywhere in the article.
-
The Hacker News
Researchers Show a Single Malicious Webpage Visit Can Compromise Tor Browser
Nebula Security says a patched Firefox JIT flaw could be triggered by simply visiting a malicious webpage and was also used to compromise Tor Browser. Tracked as CVE-2026-10702, the bug provides arbit ... Read more
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Ars Technica
Google pays $250K for Linux vulnerability allowing guest VM escapes
A Linux vulnerability that allows untrusted virtual machines to gain root access to host machines is one of two high-severity flaws to surface this week in the open source operating system. The vulner ... Read more
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The Hacker News
15-Year-Old GhostLock Flaw Enables Root and Container Escape on Most Linux Distros
Researchers at Nebula Security have disclosed GhostLock (CVE-2026-43499), a 15-year-old Linux kernel flaw that lets any logged-in user take full root control of a machine that has not been patched. Th ... Read more
The following table lists the changes that have been made to the
CVE-2026-43499 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 24, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/838ce5cb5d93c3ab8b27e75bc6ad905a94b752fd Added Reference https://git.kernel.org/stable/c/f3fa3424bceb128d2be4b3745506b22844b87db7 Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '8161239a8bcce9ad6b537c04a1fa3b5c68bae693', 'lessThan': 'd8cce4773c2b23d819baf5abedc62f7b430e8745', 'versionType': 'git'}, {'status': 'affected', 'version': '8161239a8bcce9ad6b537c04a1fa3b5c68bae693', 'lessThan': '8a1fc8d698ac5e5916e3082a0f74450d71f9611f', 'versionType': 'git'}, {'status': 'affected', 'version': '8161239a8bcce9ad6b537c04a1fa3b5c68bae693', 'lessThan': '6d52dfcb2a5db86e346cf51f8fcf2071b8085166', 'versionType': 'git'}, {'status': 'affected', 'version': '8161239a8bcce9ad6b537c04a1fa3b5c68bae693', 'lessThan': '3fb7394a837740770f0d6b4b30567e60786a63f2', 'versionType': 'git'}, {'status': 'affected', 'version': '8161239a8bcce9ad6b537c04a1fa3b5c68bae693', 'lessThan': '88614876370aac8ad1050ad785a4c095ba17ac11', 'versionType': 'git'}, {'status': 'affected', 'version': '8161239a8bcce9ad6b537c04a1fa3b5c68bae693', 'lessThan': '3bfdc63936dd4773109b7b8c280c0f3b5ae7d349', 'versionType': 'git'}], 'programFiles': ['kernel/locking/rtmutex.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.39'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.39', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.1.175', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.140', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.86', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.27', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.4', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['kernel/locking/rtmutex.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '8161239a8bcce9ad6b537c04a1fa3b5c68bae693', 'lessThan': 'f3fa3424bceb128d2be4b3745506b22844b87db7', 'versionType': 'git'}, {'status': 'affected', 'version': '8161239a8bcce9ad6b537c04a1fa3b5c68bae693', 'lessThan': '838ce5cb5d93c3ab8b27e75bc6ad905a94b752fd', 'versionType': 'git'}, {'status': 'affected', 'version': '8161239a8bcce9ad6b537c04a1fa3b5c68bae693', 'lessThan': 'd8cce4773c2b23d819baf5abedc62f7b430e8745', 'versionType': 'git'}, {'status': 'affected', 'version': '8161239a8bcce9ad6b537c04a1fa3b5c68bae693', 'lessThan': '8a1fc8d698ac5e5916e3082a0f74450d71f9611f', 'versionType': 'git'}, {'status': 'affected', 'version': '8161239a8bcce9ad6b537c04a1fa3b5c68bae693', 'lessThan': '6d52dfcb2a5db86e346cf51f8fcf2071b8085166', 'versionType': 'git'}, {'status': 'affected', 'version': '8161239a8bcce9ad6b537c04a1fa3b5c68bae693', 'lessThan': '3fb7394a837740770f0d6b4b30567e60786a63f2', 'versionType': 'git'}, {'status': 'affected', 'version': '8161239a8bcce9ad6b537c04a1fa3b5c68bae693', 'lessThan': '88614876370aac8ad1050ad785a4c095ba17ac11', 'versionType': 'git'}, {'status': 'affected', 'version': '8161239a8bcce9ad6b537c04a1fa3b5c68bae693', 'lessThan': '3bfdc63936dd4773109b7b8c280c0f3b5ae7d349', 'versionType': 'git'}], 'programFiles': ['kernel/locking/rtmutex.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.39'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.39', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.175', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.140', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.86', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.27', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.4', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['kernel/locking/rtmutex.c'], 'defaultStatus': 'affected'}] -
CVE Translated by [email protected]
Jul. 23, 2026
Action Type Old Value New Value Added Translation Title: el kernel de Linux, Description: En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: rtmutex: Usar waiter::task en lugar de current en remove_waiter() remove_waiter() es usado por las rutas de slowlock, pero también es usado para la reversión de bloqueo de proxy en rt_mutex_start_proxy_lock() cuando es invocado desde futex_requeue(). En este último caso, waiter::task no es current, pero remove_waiter() opera en current para la operación de desencolado. Eso resulta en varios problemas: 1) el desencolado de rbtree ocurre sin que waiter::task::pi_lock esté retenido 2) el estado pi_blocked_on de la tarea de espera no se borra, lo que deja un puntero colgante preparado para UAF. 3) rt_mutex_adjust_prio_chain() opera en la tarea de espera de máxima prioridad incorrecta Usar waiter::task en lugar de current en todas las operaciones relacionadas en remove_waiter() para solucionar esos problemas. [ tglx: Corregir rt_mutex_adjust_prio_chain(), añadir un comentario y modificar el registro de cambios ] -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Jul. 08, 2026
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2026/07/08/12 -
Initial Analysis by [email protected]
Jun. 26, 2026
Action Type Old Value New Value Added CWE CWE-416 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.86 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.140 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.27 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.4 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 2.6.39 up to (excluding) 6.1.175 Added Reference Type kernel.org: https://git.kernel.org/stable/c/3bfdc63936dd4773109b7b8c280c0f3b5ae7d349 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/3fb7394a837740770f0d6b4b30567e60786a63f2 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/6d52dfcb2a5db86e346cf51f8fcf2071b8085166 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/88614876370aac8ad1050ad785a4c095ba17ac11 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/8a1fc8d698ac5e5916e3082a0f74450d71f9611f Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/d8cce4773c2b23d819baf5abedc62f7b430e8745 Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '8161239a8bcce9ad6b537c04a1fa3b5c68bae693', 'lessThan': 'd8cce4773c2b23d819baf5abedc62f7b430e8745', 'versionType': 'git'}, {'status': 'affected', 'version': '8161239a8bcce9ad6b537c04a1fa3b5c68bae693', 'lessThan': '8a1fc8d698ac5e5916e3082a0f74450d71f9611f', 'versionType': 'git'}, {'status': 'affected', 'version': '8161239a8bcce9ad6b537c04a1fa3b5c68bae693', 'lessThan': '6d52dfcb2a5db86e346cf51f8fcf2071b8085166', 'versionType': 'git'}, {'status': 'affected', 'version': '8161239a8bcce9ad6b537c04a1fa3b5c68bae693', 'lessThan': '3fb7394a837740770f0d6b4b30567e60786a63f2', 'versionType': 'git'}, {'status': 'affected', 'version': '8161239a8bcce9ad6b537c04a1fa3b5c68bae693', 'lessThan': '88614876370aac8ad1050ad785a4c095ba17ac11', 'versionType': 'git'}, {'status': 'affected', 'version': '8161239a8bcce9ad6b537c04a1fa3b5c68bae693', 'lessThan': '3bfdc63936dd4773109b7b8c280c0f3b5ae7d349', 'versionType': 'git'}], 'programFiles': ['kernel/locking/rtmutex.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.39'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.39', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.1.175', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.140', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.86', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.27', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.4', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['kernel/locking/rtmutex.c'], 'defaultStatus': 'affected'}] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 01, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/d8cce4773c2b23d819baf5abedc62f7b430e8745 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 30, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 21, 2026
Action Type Old Value New Value Added Description 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_start_proxy_lock() when invoked from futex_requeue(). In the latter case waiter::task is not current, but remove_waiter() operates on current for the dequeue operation. That results in several problems: 1) the rbtree dequeue happens without waiter::task::pi_lock being held 2) the waiter task's pi_blocked_on state is not cleared, which leaves a dangling pointer primed for UAF around. 3) rt_mutex_adjust_prio_chain() operates on the wrong top priority waiter task Use waiter::task instead of current in all related operations in remove_waiter() to cure those problems. [ tglx: Fixup rt_mutex_adjust_prio_chain(), add a comment and amend the changelog ] Added Reference https://git.kernel.org/stable/c/3bfdc63936dd4773109b7b8c280c0f3b5ae7d349 Added Reference https://git.kernel.org/stable/c/3fb7394a837740770f0d6b4b30567e60786a63f2 Added Reference https://git.kernel.org/stable/c/6d52dfcb2a5db86e346cf51f8fcf2071b8085166 Added Reference https://git.kernel.org/stable/c/88614876370aac8ad1050ad785a4c095ba17ac11 Added Reference https://git.kernel.org/stable/c/8a1fc8d698ac5e5916e3082a0f74450d71f9611f