CVE-2026-63816

{"id": "CVE-2026-63816", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "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": "3db1de0e582c358dd013f3703cd55b5fe4076436", "lessThan": "7d3ae21783e5914c1761ac7d63f882d3d70800e9", "versionType": "git"}, {"status": "affected", "version": "3db1de0e582c358dd013f3703cd55b5fe4076436", "lessThan": "56038756aae68312df00d4aa1d97e51ef3aca725", "versionType": "git"}, {"status": "affected", "version": "3db1de0e582c358dd013f3703cd55b5fe4076436", "lessThan": "a499f77c06050a28c897bdbd86cd2f0721ae0743", "versionType": "git"}, {"status": "affected", "version": "3db1de0e582c358dd013f3703cd55b5fe4076436", "lessThan": "a805fec35c201c59643ddcde713bce4051c8ee27", "versionType": "git"}, {"status": "affected", "version": "3db1de0e582c358dd013f3703cd55b5fe4076436", "lessThan": "e0288584baa5dc41df4a829a023c4c1b33fe53d7", "versionType": "git"}, {"status": "affected", "version": "6db52f1944417c2601182a591a704e2f119c5215", "versionType": "git"}, {"status": "affected", "version": "5.18.18", "lessThan": "5.19", "versionType": "semver"}], "programFiles": ["fs/f2fs/gc.c", "fs/f2fs/inode.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.19"}, {"status": "unaffected", "version": "0", "lessThan": "5.19", "versionType": "semver"}, {"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": "7.1.3", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/f2fs/gc.c", "fs/f2fs/inode.c"], "defaultStatus": "affected"}]}], "published": "2026-07-19T12:16:54.643", "references": [{"url": "https://git.kernel.org/stable/c/56038756aae68312df00d4aa1d97e51ef3aca725", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/7d3ae21783e5914c1761ac7d63f882d3d70800e9", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a499f77c06050a28c897bdbd86cd2f0721ae0743", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a805fec35c201c59643ddcde713bce4051c8ee27", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e0288584baa5dc41df4a829a023c4c1b33fe53d7", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: atomic: fix UAF issue on f2fs_inode_info.atomic_inode\n\n- ioctl(F2FS_IOC_GARBAGE_COLLECT_RANGE)\t\t- shrink\n - f2fs_gc\n - gc_data_segment\n - ra_data_block(cow_inode)\n - mapping = F2FS_I(inode)->atomic_inode->i_mapping\n : f2fs_is_cow_file(cow_inode) is true\n\t\t\t\t\t\t - f2fs_evict_inode(atomic_inode)\n\t\t\t\t\t\t - clear_inode_flag(fi->cow_inode, FI_COW_FILE)\n\t\t\t\t\t\t - F2FS_I(fi->cow_inode)->atomic_inode = NULL\n\t\t\t\t\t\t ...\n\t\t\t\t\t\t - truncate_inode_pages_final(atomic_inode)\n - f2fs_grab_cache_folio(mapping)\n : create folio in atomic_inode->mapping\n\t\t\t\t\t\t - clear_inode(atomic_inode)\n\t\t\t\t\t\t - BUG_ON(atomic_inode->i_data.nrpages)\n\nWe need to add a reference on fi->atomic_inode before using its mapping\nfield during garbage collection, otherwise, it will cause UAF issue."}], "lastModified": "2026-11-10T20:43:44.910", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "42B692BE-781C-4BBF-9AAE-B43D47A9E32E", "versionEndExcluding": "6.6.145", "versionStartIncluding": "5.18.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "38A8100E-2B1A-462F-AEE9-8901B870FEF2", "versionEndExcluding": "6.12.96", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "914AE4BC-3D59-4C5A-9DB5-9CE327B429F7", "versionEndExcluding": "6.18.39", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9526B150-E2B3-4C6F-8AE5-1AF92B75AD9E", "versionEndExcluding": "7.1.3", "versionStartIncluding": "6.19"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}