CVE-2026-89830

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89830", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.769Z", "datePublished": "2026-09-16T10:31:02.688Z", "dateUpdated": "2026-10-19T08:53:23.860Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:53:23.860Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix valid block count leak on data block allocation failure\n\nIn __allocate_data_block(), when allocating a new data block\n(dn->data_blkaddr == NULL_ADDR), inc_valid_block_count() is\ncalled first to increment total_valid_block_count and i_blocks.\nIf the subsequent f2fs_allocate_data_block() fails, the function\nreturns the error directly without rolling back the\nalready-incremented block counts, causing a permanent leak.\n\nFix this by calling dec_valid_block_count() to undo the\nincrement before returning the error. The condition\nold_blkaddr == NULL_ADDR precisely identifies the case where\ninc_valid_block_count() was called."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/f2fs/data.c"], "versions": [{"version": "7d009e048d7cfcc21d400f2aba4c8bacbdebbd47", "lessThan": "2d50b6d47e5671ff6a25834c5906d443356191f0", "status": "affected", "versionType": "git"}, {"version": "7d009e048d7cfcc21d400f2aba4c8bacbdebbd47", "lessThan": "dde99df5a9d3b0ca6ac0a86f98799685f7399432", "status": "affected", "versionType": "git"}, {"version": "7d009e048d7cfcc21d400f2aba4c8bacbdebbd47", "lessThan": "931e1aa4d44c52ff8e0feb38420a8827c62e886b", "status": "affected", "versionType": "git"}, {"version": "7d009e048d7cfcc21d400f2aba4c8bacbdebbd47", "lessThan": "0f9af07ecc1ab486038373db6ae0436c5d674b19", "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/data.c"], "versions": [{"version": "6.9", "status": "affected"}, {"version": "0", "lessThan": "6.9", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.51", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.5", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "6.9", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.18.51"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "7.2.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/2d50b6d47e5671ff6a25834c5906d443356191f0"}, {"url": "https://git.kernel.org/stable/c/dde99df5a9d3b0ca6ac0a86f98799685f7399432"}, {"url": "https://git.kernel.org/stable/c/931e1aa4d44c52ff8e0feb38420a8827c62e886b"}, {"url": "https://git.kernel.org/stable/c/0f9af07ecc1ab486038373db6ae0436c5d674b19"}], "title": "f2fs: fix valid block count leak on data block allocation failure", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/f2fs/data.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "2d50b6d47e5671ff6a25834c5906d443356191f0", "status": "affected", "version": "7d009e048d7cfcc21d400f2aba4c8bacbdebbd47", "versionType": "git"}, {"lessThan": "dde99df5a9d3b0ca6ac0a86f98799685f7399432", "status": "affected", "version": "7d009e048d7cfcc21d400f2aba4c8bacbdebbd47", "versionType": "git"}, {"lessThan": "931e1aa4d44c52ff8e0feb38420a8827c62e886b", "status": "affected", "version": "7d009e048d7cfcc21d400f2aba4c8bacbdebbd47", "versionType": "git"}, {"lessThan": "0f9af07ecc1ab486038373db6ae0436c5d674b19", "status": "affected", "version": "7d009e048d7cfcc21d400f2aba4c8bacbdebbd47", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/f2fs/data.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.9"}, {"lessThan": "6.9", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.51", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "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 valid block count leak on data block allocation failure\n\nIn __allocate_data_block(), when allocating a new data block\n(dn->data_blkaddr == NULL_ADDR), inc_valid_block_count() is\ncalled first to increment total_valid_block_count and i_blocks.\nIf the subsequent f2fs_allocate_data_block() fails, the function\nreturns the error directly without rolling back the\nalready-incremented block counts, causing a permanent leak.\n\nFix this by calling dec_valid_block_count() to undo the\nincrement before returning the error. The condition\nold_blkaddr == NULL_ADDR precisely identifies the case where\ninc_valid_block_count() was called."}], "id": "CVE-2026-89830", "lastModified": "2026-10-19T09:18:26.963", "metrics": {}, "published": "2026-09-16T11:16:49.753", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0f9af07ecc1ab486038373db6ae0436c5d674b19"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2d50b6d47e5671ff6a25834c5906d443356191f0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/931e1aa4d44c52ff8e0feb38420a8827c62e886b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dde99df5a9d3b0ca6ac0a86f98799685f7399432"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7d009e048d7cfcc21d400f2aba4c8bacbdebbd47,2d50b6d47e5671ff6a25834c5906d443356191f0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7d009e048d7cfcc21d400f2aba4c8bacbdebbd47,dde99df5a9d3b0ca6ac0a86f98799685f7399432)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7d009e048d7cfcc21d400f2aba4c8bacbdebbd47,931e1aa4d44c52ff8e0feb38420a8827c62e886b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7d009e048d7cfcc21d400f2aba4c8bacbdebbd47,0f9af07ecc1ab486038373db6ae0436c5d674b19)"}}], "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": "6.9"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.9)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.51,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.5,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-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": "2026-09-17T14:00:12.700531+00:00", "updated": "2026-09-18T09:45:06.366338+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-399"]}