CVE-2026-80777
CVE CVE-2026-80777EUVD EUVD-2026-71420Published 2026-09-04T15:12:49.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: futex/pi: Plug private futex exec() race The check for private futexes whether the waiter's mm, which is stored in the futex_key and copied into the pi_state, is the same as the owner's mm is not sufficient for exec(). exec() has a gap where the mm check fails to give the correct answer: exec() ... exec_release_mm() futex_exec_release() tsk::futex::exit_state = EXITING; cleanup_robust_list(); 1) tsk::futex::exit_state = OK; ... old_mm = tsk::mm; 2) tsk::mm = ->mm; Between #1 and #2 the check for the mm is wrong as that mm is about to be swapped out and eventually freed. Plug this gap by: 1) Setting tsk::futex::exit_state to FUTEX_STATE_DEAD in futex_exec_release() 2) Setting tsk::futex::exit_state to FUTEX_STATE_OK after the mm has been switched. From a futex point of view the task is dead after it finished the robust list cleanup up to the point where it sets the state to OK again.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux 80367ad01d93ac781b0e1df246edaf006928002f <0478bc6bf197629fea0331d65b39eeea043c6cf0; patch: 0; 6.16; patch: 7.3-rc1; patch: 7.1.11; patch: 6.18.47; 80367ad01d93ac781b0e1df246edaf006928002f <d7944cee62ec6cca1c90780a766960a57d3b4bb8; 80367ad01d93ac781b0e1df246edaf006928002f <c5f0bc9fd1cec4a00400cc727fcde03e0fde17cc; 80367ad01d93ac781b0e1df246edaf006928002f <fdf538b2e69653ff740e84042245018e5680cd7b; patch: 7.2.1
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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