CVE-2026-68459
In the Linux kernel, the following vulnerability has been resolved:
f2fs: fix potential deadlock in gc_merge path of f2fs_balance_fs()
When we mount device w/ gc_merge mount option, we may suffer below potential deadlock:
Kworker GC trehad Truncator - f2fs_write_cache_pages - f2fs_write_single_data_page - f2fs_do_write_data_page - folio_start_writeback --- set writeback flag on folio - f2fs_outplace_write_data : cached folio in internal bio cache - f2fs_balance_fs - wake_up(gc_thread) : wake up gc thread to run foreground GC - finish_wait(fggc_wq) : wait on the waitqueue --- wait on GC thread to finish the work - truncate_inode_pages_range - __filemap_get_folio(, FGP_LOCK) --- lock folio - truncate_inode_partial_folio - folio_wait_writeback --- wait on writeback being cleared - do_garbage_collect - move_data_page - f2fs_get_lock_data_folio - lock on folio --- blocked on folio's lock
Leer descripción completaMostrar menos
In order to avoid such deadlock, let's call below functions to commit cached bios in GC_MERGE path of f2fs_balance_fs() as the same as we did in NOGC_MERGE path. - f2fs_submit_merged_write(sbi, DATA); - f2fs_submit_all_merged_ipu_writes(sbi);
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: 11
- Fecha de la puntuación: 5/10/2026
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
- https://git.kernel.org/stable/c/1436031b33fa23ab1ce7df5bc5500093413e8acf
- https://git.kernel.org/stable/c/8071500a8124e5a6d47d901a8d5ffd91743107a1
- https://git.kernel.org/stable/c/89479a27fa4e1e11f378b3724944eabceb84f114
- https://git.kernel.org/stable/c/8b4468ec023d0d1b4669dfb867588997cc03a06b
- https://git.kernel.org/stable/c/aa807064473abd6f2cafe419fb77ea402d3e3104
- https://git.kernel.org/stable/c/b885c7783c19c36c7bf899492a0bffcd68afa8c7
- https://git.kernel.org/stable/c/eb02f218aacb36365e0ca2339cbae81fb05d31a5
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-68459",
"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": "351df4b201157351c7d26bf12c3eeb9dbce98854",
"lessThan": "8071500a8124e5a6d47d901a8d5ffd91743107a1",
"versionType": "git"
},
{
"status": "affected",
"version": "351df4b201157351c7d26bf12c3eeb9dbce98854",
"lessThan": "eb02f218aacb36365e0ca2339cbae81fb05d31a5",
"versionType": "git"
},
{
"status": "affected",
"version": "351df4b201157351c7d26bf12c3eeb9dbce98854",
"lessThan": "1436031b33fa23ab1ce7df5bc5500093413e8acf",
"versionType": "git"
},
{
"status": "affected",
"version": "351df4b201157351c7d26bf12c3eeb9dbce98854",
"lessThan": "b885c7783c19c36c7bf899492a0bffcd68afa8c7",
"versionType": "git"
},
{
"status": "affected",
"version": "351df4b201157351c7d26bf12c3eeb9dbce98854",
"lessThan": "89479a27fa4e1e11f378b3724944eabceb84f114",
"versionType": "git"
},
{
"status": "affected",
"version": "351df4b201157351c7d26bf12c3eeb9dbce98854",
"lessThan": "aa807064473abd6f2cafe419fb77ea402d3e3104",
"versionType": "git"
},
{
"status": "affected",
"version": "351df4b201157351c7d26bf12c3eeb9dbce98854",
"lessThan": "8b4468ec023d0d1b4669dfb867588997cc03a06b",
"versionType": "git"
}
],
"programFiles": [
"fs/f2fs/segment.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.96",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.39",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/f2fs/segment.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-08-15T06:18:15.460",
"references": [
{
"url": "https://git.kernel.org/stable/c/1436031b33fa23ab1ce7df5bc5500093413e8acf",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/8071500a8124e5a6d47d901a8d5ffd91743107a1",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/89479a27fa4e1e11f378b3724944eabceb84f114",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/8b4468ec023d0d1b4669dfb867588997cc03a06b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/aa807064473abd6f2cafe419fb77ea402d3e3104",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/b885c7783c19c36c7bf899492a0bffcd68afa8c7",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/eb02f218aacb36365e0ca2339cbae81fb05d31a5",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix potential deadlock in gc_merge path of f2fs_balance_fs()\n\nWhen we mount device w/ gc_merge mount option, we may suffer below\npotential deadlock:\n\nKworker\t\t\t\t\tGC trehad\t\t\tTruncator\n- f2fs_write_cache_pages\n - f2fs_write_single_data_page\n - f2fs_do_write_data_page\n - folio_start_writeback --- set writeback flag on folio\n - f2fs_outplace_write_data\n : cached folio in internal bio cache\n - f2fs_balance_fs\n - wake_up(gc_thread)\n : wake up gc thread to run foreground GC\n - finish_wait(fggc_wq)\n : wait on the waitqueue --- wait on GC thread to finish the work\n\t\t\t\t\t\t\t\t\t- truncate_inode_pages_range\n\t\t\t\t\t\t\t\t\t - __filemap_get_folio(, FGP_LOCK) --- lock folio\n\t\t\t\t\t\t\t\t\t - truncate_inode_partial_folio\n\t\t\t\t\t\t\t\t\t - folio_wait_writeback --- wait on writeback being cleared\n\t\t\t\t\t- do_garbage_collect\n\t\t\t\t\t - move_data_page\n\t\t\t\t\t - f2fs_get_lock_data_folio\n\t\t\t\t\t - lock on folio --- blocked on folio's lock\n\nIn order to avoid such deadlock, let's call below functions to commit\ncached bios in GC_MERGE path of f2fs_balance_fs() as the same as we did\nin NOGC_MERGE path.\n- f2fs_submit_merged_write(sbi, DATA);\n- f2fs_submit_all_merged_ipu_writes(sbi);"
}
],
"lastModified": "2026-08-17T06:17:55.127",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}