CVE-2026-80777
Estado: RecibidaSin puntuar—
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:
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:
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.
Detalles técnicos trazas, registros y código del informe original
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;
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.CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.21%
- Percentil entre todas las CVEs puntuadas: 10
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-80777",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "80367ad01d93ac781b0e1df246edaf006928002f",
"lessThan": "fdf538b2e69653ff740e84042245018e5680cd7b",
"versionType": "git"
},
{
"status": "affected",
"version": "80367ad01d93ac781b0e1df246edaf006928002f",
"lessThan": "0478bc6bf197629fea0331d65b39eeea043c6cf0",
"versionType": "git"
},
{
"status": "affected",
"version": "80367ad01d93ac781b0e1df246edaf006928002f",
"lessThan": "d7944cee62ec6cca1c90780a766960a57d3b4bb8",
"versionType": "git"
},
{
"status": "affected",
"version": "80367ad01d93ac781b0e1df246edaf006928002f",
"lessThan": "c5f0bc9fd1cec4a00400cc727fcde03e0fde17cc",
"versionType": "git"
}
],
"programFiles": [
"fs/exec.c",
"include/linux/futex.h",
"kernel/futex/core.c",
"kernel/futex/pi.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.16"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.16",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.47",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.11",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2.1",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3-rc1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/exec.c",
"include/linux/futex.h",
"kernel/futex/core.c",
"kernel/futex/pi.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-09-04T16:18:03.373",
"references": [
{
"url": "https://git.kernel.org/stable/c/0478bc6bf197629fea0331d65b39eeea043c6cf0",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/c5f0bc9fd1cec4a00400cc727fcde03e0fde17cc",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/d7944cee62ec6cca1c90780a766960a57d3b4bb8",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/fdf538b2e69653ff740e84042245018e5680cd7b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfutex/pi: Plug private futex exec() race\n\nThe check for private futexes whether the waiter's mm, which is stored in\nthe futex_key and copied into the pi_state, is the same as the owner's mm\nis not sufficient for exec(). exec() has a gap where the mm check fails to\ngive the correct answer:\n\n exec()\n ...\n exec_release_mm()\n futex_exec_release()\n tsk::futex::exit_state = EXITING;\n cleanup_robust_list();\n1) tsk::futex::exit_state = OK;\n ...\n old_mm = tsk::mm;\n2) tsk::mm = ->mm;\n\nBetween #1 and #2 the check for the mm is wrong as that mm is about to be\nswapped out and eventually freed.\n\nPlug this gap by:\n\n 1) Setting tsk::futex::exit_state to FUTEX_STATE_DEAD in\n futex_exec_release()\n\n 2) Setting tsk::futex::exit_state to FUTEX_STATE_OK after\n the mm has been switched.\n\nFrom a futex point of view the task is dead after it finished the robust\nlist cleanup up to the point where it sets the state to OK again."
}
],
"lastModified": "2026-09-04T16:18:03.373",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}