{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-38221",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-04-16T04:51:23.995Z",
        "datePublished": "2025-07-04T13:37:37.248Z",
        "dateUpdated": "2026-05-11T21:23:34.763Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T21:23:34.763Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix out of bounds punch offset\n\nPunching a hole with a start offset that exceeds max_end is not\npermitted and will result in a negative length in the\ntruncate_inode_partial_folio() function while truncating the page cache,\npotentially leading to undesirable consequences.\n\nA simple reproducer:\n\n  truncate -s 9895604649994 /mnt/foo\n  xfs_io -c \"pwrite 8796093022208 4096\" /mnt/foo\n  xfs_io -c \"fpunch 8796093022213 25769803777\" /mnt/foo\n\n  kernel BUG at include/linux/highmem.h:275!\n  Oops: invalid opcode: 0000 [#1] SMP PTI\n  CPU: 3 UID: 0 PID: 710 Comm: xfs_io Not tainted 6.15.0-rc3\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-2.fc40 04/01/2014\n  RIP: 0010:zero_user_segments.constprop.0+0xd7/0x110\n  RSP: 0018:ffffc90001cf3b38 EFLAGS: 00010287\n  RAX: 0000000000000005 RBX: ffffea0001485e40 RCX: 0000000000001000\n  RDX: 000000000040b000 RSI: 0000000000000005 RDI: 000000000040b000\n  RBP: 000000000040affb R08: ffff888000000000 R09: ffffea0000000000\n  R10: 0000000000000003 R11: 00000000fffc7fc5 R12: 0000000000000005\n  R13: 000000000040affb R14: ffffea0001485e40 R15: ffff888031cd3000\n  FS:  00007f4f63d0b780(0000) GS:ffff8880d337d000(0000)\n  knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: 000000001ae0b038 CR3: 00000000536aa000 CR4: 00000000000006f0\n  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n  Call Trace:\n   <TASK>\n   truncate_inode_partial_folio+0x3dd/0x620\n   truncate_inode_pages_range+0x226/0x720\n   ? bdev_getblk+0x52/0x3e0\n   ? ext4_get_group_desc+0x78/0x150\n   ? crc32c_arch+0xfd/0x180\n   ? __ext4_get_inode_loc+0x18c/0x840\n   ? ext4_inode_csum+0x117/0x160\n   ? jbd2_journal_dirty_metadata+0x61/0x390\n   ? __ext4_handle_dirty_metadata+0xa0/0x2b0\n   ? kmem_cache_free+0x90/0x5a0\n   ? jbd2_journal_stop+0x1d5/0x550\n   ? __ext4_journal_stop+0x49/0x100\n   truncate_pagecache_range+0x50/0x80\n   ext4_truncate_page_cache_block_range+0x57/0x3a0\n   ext4_punch_hole+0x1fe/0x670\n   ext4_fallocate+0x792/0x17d0\n   ? __count_memcg_events+0x175/0x2a0\n   vfs_fallocate+0x121/0x560\n   ksys_fallocate+0x51/0xc0\n   __x64_sys_fallocate+0x24/0x40\n   x64_sys_call+0x18d2/0x4170\n   do_syscall_64+0xa7/0x220\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nFix this by filtering out cases where the punching start offset exceeds\nmax_end."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/ext4/inode.c"
                    ],
                    "versions": [
                        {
                            "version": "33f61ecabb10098b63dad3b729552779379f900d",
                            "lessThan": "a4d60ba277ecd8a98c5a593cbc0ef2237c20a541",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "982bf37da09d078570650b691d9084f43805a5de",
                            "lessThan": "28b62cb58fd014338f5004170f2e3a35bf0af238",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "982bf37da09d078570650b691d9084f43805a5de",
                            "lessThan": "b5e58bcd79625423487fa3ecba8e8411b5396327",
                            "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/ext4/inode.c"
                    ],
                    "versions": [
                        {
                            "version": "6.15",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.15",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.15.4",
                            "lessThanOrEqual": "6.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.16",
                            "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": "6.15",
                                    "versionEndExcluding": "6.15.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.15",
                                    "versionEndExcluding": "6.16"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/a4d60ba277ecd8a98c5a593cbc0ef2237c20a541"
                },
                {
                    "url": "https://git.kernel.org/stable/c/28b62cb58fd014338f5004170f2e3a35bf0af238"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b5e58bcd79625423487fa3ecba8e8411b5396327"
                }
            ],
            "title": "ext4: fix out of bounds punch offset",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}