{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-38626",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-04-16T04:51:24.029Z",
        "datePublished": "2025-08-22T16:00:34.867Z",
        "dateUpdated": "2026-06-01T16:05:25.352Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-06-01T16:05:25.352Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to trigger foreground gc during f2fs_map_blocks() in lfs mode\n\nw/ \"mode=lfs\" mount option, generic/299 will cause system panic as below:\n\n------------[ cut here ]------------\nkernel BUG at fs/f2fs/segment.c:2835!\nCall Trace:\n <TASK>\n f2fs_allocate_data_block+0x6f4/0xc50\n f2fs_map_blocks+0x970/0x1550\n f2fs_iomap_begin+0xb2/0x1e0\n iomap_iter+0x1d6/0x430\n __iomap_dio_rw+0x208/0x9a0\n f2fs_file_write_iter+0x6b3/0xfa0\n aio_write+0x15d/0x2e0\n io_submit_one+0x55e/0xab0\n __x64_sys_io_submit+0xa5/0x230\n do_syscall_64+0x84/0x2f0\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\nRIP: 0010:new_curseg+0x70f/0x720\n\nThe root cause of we run out-of-space is: in f2fs_map_blocks(), f2fs may\ntrigger foreground gc only if it allocates any physical block, it will be\na little bit later when there is multiple threads writing data w/\naio/dio/bufio method in parallel, since we always use OPU in lfs mode, so\nf2fs_map_blocks() does block allocations aggressively.\n\nIn order to fix this issue, let's give a chance to trigger foreground\ngc in prior to block allocation in f2fs_map_blocks()."
                }
            ],
            "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": "36abef4e796d382e81a0c2d21ea5327481dd7154",
                            "lessThan": "c737047f4665232d1e26b3620bc62df334545451",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "36abef4e796d382e81a0c2d21ea5327481dd7154",
                            "lessThan": "d2f280f43a2a9d918fd23169ff3a6f3b65c7cec5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "36abef4e796d382e81a0c2d21ea5327481dd7154",
                            "lessThan": "f289690f50a01c3e085d87853392d5b7436a4cee",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "36abef4e796d382e81a0c2d21ea5327481dd7154",
                            "lessThan": "82765ce5c7a56f9309ee45328e763610eaf11253",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "36abef4e796d382e81a0c2d21ea5327481dd7154",
                            "lessThan": "264ede8a52f18647ed5bb5f2bd9bf54f556ad8f5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "36abef4e796d382e81a0c2d21ea5327481dd7154",
                            "lessThan": "385e64a0744584397b4b52b27c96703516f39968",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "36abef4e796d382e81a0c2d21ea5327481dd7154",
                            "lessThan": "1005a3ca28e90c7a64fa43023f866b960a60f791",
                            "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": "4.8",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.8",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.209",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.167",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.102",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.42",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.15.10",
                            "lessThanOrEqual": "6.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.16.1",
                            "lessThanOrEqual": "6.16.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.17",
                            "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": "4.8",
                                    "versionEndExcluding": "5.15.209"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.8",
                                    "versionEndExcluding": "6.1.167"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.8",
                                    "versionEndExcluding": "6.6.102"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.8",
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                                },
                                {
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                                    "versionStartIncluding": "4.8",
                                    "versionEndExcluding": "6.15.10"
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                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.8",
                                    "versionEndExcluding": "6.16.1"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.8",
                                    "versionEndExcluding": "6.17"
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                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/c737047f4665232d1e26b3620bc62df334545451"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d2f280f43a2a9d918fd23169ff3a6f3b65c7cec5"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f289690f50a01c3e085d87853392d5b7436a4cee"
                },
                {
                    "url": "https://git.kernel.org/stable/c/82765ce5c7a56f9309ee45328e763610eaf11253"
                },
                {
                    "url": "https://git.kernel.org/stable/c/264ede8a52f18647ed5bb5f2bd9bf54f556ad8f5"
                },
                {
                    "url": "https://git.kernel.org/stable/c/385e64a0744584397b4b52b27c96703516f39968"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1005a3ca28e90c7a64fa43023f866b960a60f791"
                }
            ],
            "title": "f2fs: fix to trigger foreground gc during f2fs_map_blocks() in lfs mode",
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                "engine": "bippy-1.2.0"
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    }
}