{"api_version":"1","generated_at":"2026-09-05T20:57:01+00:00","cve":"CVE-2026-80777","urls":{"html":"https://cve.report/CVE-2026-80777","api":"https://cve.report/api/cve/CVE-2026-80777.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80777","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80777"},"summary":{"title":"futex/pi: Plug private futex exec() race","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-04 16:18:03","updated_at":"2026-09-04 16:18:03"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/c5f0bc9fd1cec4a00400cc727fcde03e0fde17cc","name":"https://git.kernel.org/stable/c/c5f0bc9fd1cec4a00400cc727fcde03e0fde17cc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d7944cee62ec6cca1c90780a766960a57d3b4bb8","name":"https://git.kernel.org/stable/c/d7944cee62ec6cca1c90780a766960a57d3b4bb8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0478bc6bf197629fea0331d65b39eeea043c6cf0","name":"https://git.kernel.org/stable/c/0478bc6bf197629fea0331d65b39eeea043c6cf0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fdf538b2e69653ff740e84042245018e5680cd7b","name":"https://git.kernel.org/stable/c/fdf538b2e69653ff740e84042245018e5680cd7b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80777","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80777","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 80367ad01d93ac781b0e1df246edaf006928002f fdf538b2e69653ff740e84042245018e5680cd7b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 80367ad01d93ac781b0e1df246edaf006928002f 0478bc6bf197629fea0331d65b39eeea043c6cf0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 80367ad01d93ac781b0e1df246edaf006928002f d7944cee62ec6cca1c90780a766960a57d3b4bb8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 80367ad01d93ac781b0e1df246edaf006928002f c5f0bc9fd1cec4a00400cc727fcde03e0fde17cc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.16","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.16 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.47 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.11 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.1 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/exec.c","include/linux/futex.h","kernel/futex/core.c","kernel/futex/pi.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"fdf538b2e69653ff740e84042245018e5680cd7b","status":"affected","version":"80367ad01d93ac781b0e1df246edaf006928002f","versionType":"git"},{"lessThan":"0478bc6bf197629fea0331d65b39eeea043c6cf0","status":"affected","version":"80367ad01d93ac781b0e1df246edaf006928002f","versionType":"git"},{"lessThan":"d7944cee62ec6cca1c90780a766960a57d3b4bb8","status":"affected","version":"80367ad01d93ac781b0e1df246edaf006928002f","versionType":"git"},{"lessThan":"c5f0bc9fd1cec4a00400cc727fcde03e0fde17cc","status":"affected","version":"80367ad01d93ac781b0e1df246edaf006928002f","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/exec.c","include/linux/futex.h","kernel/futex/core.c","kernel/futex/pi.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.16"},{"lessThan":"6.16","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.47","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.11","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.1","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.47","versionStartIncluding":"6.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.11","versionStartIncluding":"6.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.1","versionStartIncluding":"6.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"6.16","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-09-04T15:12:49.215Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/fdf538b2e69653ff740e84042245018e5680cd7b"},{"url":"https://git.kernel.org/stable/c/0478bc6bf197629fea0331d65b39eeea043c6cf0"},{"url":"https://git.kernel.org/stable/c/d7944cee62ec6cca1c90780a766960a57d3b4bb8"},{"url":"https://git.kernel.org/stable/c/c5f0bc9fd1cec4a00400cc727fcde03e0fde17cc"}],"title":"futex/pi: Plug private futex exec() race","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80777","datePublished":"2026-09-04T15:12:49.215Z","dateReserved":"2026-08-26T14:34:25.792Z","dateUpdated":"2026-09-04T15:12:49.215Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-04 16:18:03","lastModifiedDate":"2026-09-04 16:18:03","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"80777","Ordinal":"1","Title":"futex/pi: Plug private futex exec() race","CVE":"CVE-2026-80777","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80777","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"futex/pi: Plug private futex exec() race"}]}}}