CVE-2026-68459

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68459", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.395Z", "datePublished": "2026-08-15T05:51:19.713Z", "dateUpdated": "2026-08-17T05:06:00.080Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:06:00.080Z"}, "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);"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/f2fs/segment.c"], "versions": [{"version": "351df4b201157351c7d26bf12c3eeb9dbce98854", "lessThan": "8071500a8124e5a6d47d901a8d5ffd91743107a1", "status": "affected", "versionType": "git"}, {"version": "351df4b201157351c7d26bf12c3eeb9dbce98854", "lessThan": "eb02f218aacb36365e0ca2339cbae81fb05d31a5", "status": "affected", "versionType": "git"}, {"version": "351df4b201157351c7d26bf12c3eeb9dbce98854", "lessThan": "1436031b33fa23ab1ce7df5bc5500093413e8acf", "status": "affected", "versionType": "git"}, {"version": "351df4b201157351c7d26bf12c3eeb9dbce98854", "lessThan": "b885c7783c19c36c7bf899492a0bffcd68afa8c7", "status": "affected", "versionType": "git"}, {"version": "351df4b201157351c7d26bf12c3eeb9dbce98854", "lessThan": "89479a27fa4e1e11f378b3724944eabceb84f114", "status": "affected", "versionType": "git"}, {"version": "351df4b201157351c7d26bf12c3eeb9dbce98854", "lessThan": "aa807064473abd6f2cafe419fb77ea402d3e3104", "status": "affected", "versionType": "git"}, {"version": "351df4b201157351c7d26bf12c3eeb9dbce98854", "lessThan": "8b4468ec023d0d1b4669dfb867588997cc03a06b", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/f2fs/segment.c"], "versions": [{"version": "3.8", "status": "affected"}, {"version": "0", "lessThan": "3.8", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.96", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "5.15.212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "6.12.96"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "6.18.39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8071500a8124e5a6d47d901a8d5ffd91743107a1"}, {"url": "https://git.kernel.org/stable/c/eb02f218aacb36365e0ca2339cbae81fb05d31a5"}, {"url": "https://git.kernel.org/stable/c/1436031b33fa23ab1ce7df5bc5500093413e8acf"}, {"url": "https://git.kernel.org/stable/c/b885c7783c19c36c7bf899492a0bffcd68afa8c7"}, {"url": "https://git.kernel.org/stable/c/89479a27fa4e1e11f378b3724944eabceb84f114"}, {"url": "https://git.kernel.org/stable/c/aa807064473abd6f2cafe419fb77ea402d3e3104"}, {"url": "https://git.kernel.org/stable/c/8b4468ec023d0d1b4669dfb867588997cc03a06b"}], "title": "f2fs: fix potential deadlock in gc_merge path of f2fs_balance_fs()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/f2fs/segment.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "8071500a8124e5a6d47d901a8d5ffd91743107a1", "status": "affected", "version": "351df4b201157351c7d26bf12c3eeb9dbce98854", "versionType": "git"}, {"lessThan": "eb02f218aacb36365e0ca2339cbae81fb05d31a5", "status": "affected", "version": "351df4b201157351c7d26bf12c3eeb9dbce98854", "versionType": "git"}, {"lessThan": "1436031b33fa23ab1ce7df5bc5500093413e8acf", "status": "affected", "version": "351df4b201157351c7d26bf12c3eeb9dbce98854", "versionType": "git"}, {"lessThan": "b885c7783c19c36c7bf899492a0bffcd68afa8c7", "status": "affected", "version": "351df4b201157351c7d26bf12c3eeb9dbce98854", "versionType": "git"}, {"lessThan": "89479a27fa4e1e11f378b3724944eabceb84f114", "status": "affected", "version": "351df4b201157351c7d26bf12c3eeb9dbce98854", "versionType": "git"}, {"lessThan": "aa807064473abd6f2cafe419fb77ea402d3e3104", "status": "affected", "version": "351df4b201157351c7d26bf12c3eeb9dbce98854", "versionType": "git"}, {"lessThan": "8b4468ec023d0d1b4669dfb867588997cc03a06b", "status": "affected", "version": "351df4b201157351c7d26bf12c3eeb9dbce98854", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/f2fs/segment.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.8"}, {"lessThan": "3.8", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.212", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.178", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.96", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.39", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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);"}], "id": "CVE-2026-68459", "lastModified": "2026-08-17T06:17:55.127", "metrics": {}, "published": "2026-08-15T06:18:15.460", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "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"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: f2fs: fix potential deadlock in gc_merge path of f2fs_balance_fs()", "id": "2516604", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516604"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-833", "details": ["A flaw was found in the Linux kernel's f2fs (Flash-Friendly File System) component. When a device is mounted with the `gc_merge` option, a specific interaction between kernel worker threads, the garbage collection thread, and the truncator can lead to a deadlock in the `f2fs_balance_fs()` function. This occurs when a memory page (folio) is locked and simultaneously awaited by multiple processes, resulting in a system-wide Denial of Service (DoS) condition."], "name": "CVE-2026-68459", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-68459\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-68459\nhttps://lore.kernel.org/linux-cve-announce/2026081502-CVE-2026-68459-5502@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[351df4b201157351c7d26bf12c3eeb9dbce98854,8071500a8124e5a6d47d901a8d5ffd91743107a1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[351df4b201157351c7d26bf12c3eeb9dbce98854,eb02f218aacb36365e0ca2339cbae81fb05d31a5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[351df4b201157351c7d26bf12c3eeb9dbce98854,1436031b33fa23ab1ce7df5bc5500093413e8acf)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[351df4b201157351c7d26bf12c3eeb9dbce98854,b885c7783c19c36c7bf899492a0bffcd68afa8c7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[351df4b201157351c7d26bf12c3eeb9dbce98854,89479a27fa4e1e11f378b3724944eabceb84f114)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[351df4b201157351c7d26bf12c3eeb9dbce98854,aa807064473abd6f2cafe419fb77ea402d3e3104)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[351df4b201157351c7d26bf12c3eeb9dbce98854,8b4468ec023d0d1b4669dfb867588997cc03a06b)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "3.8"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,3.8)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.212,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.96,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.39,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T07:45:04.538975+00:00", "updated": "2026-08-18T04:15:04.835894+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}