{"id":"CVE-2025-68794","revision":"d0cbf8458afe4ce18a471b790b8df64a","records":[{"revision":"d0cbf8458afe4ce18a471b790b8df64a","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-68794","aliases":[],"title":"iomap: adjust read range correctly for non-block-aligned positions","description":"In the Linux kernel, the following vulnerability has been resolved:\n\niomap: adjust read range correctly for non-block-aligned positions\n\niomap_adjust_read_range() assumes that the position and length passed in\nare block-aligned. This is not always the case however, as shown in the\nsyzbot generated case for erofs. This causes too many bytes to be\nskipped for uptodate blocks, which results in returning the incorrect\nposition and length to read in. If all the blocks are uptodate, this\nunderflows length and returns a position beyond the folio.\n\nFix the calculation to also take into account the block offset when\ncalculating how many bytes can be skipped for uptodate blocks.","state":0,"publishedAt":"2026-01-13T15:29:05.553+00:00","modifiedAt":"2026-10-19T18:05:07.542+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/iomap/buffered-io.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"9dc55f1389f9569acf9659e58dd836a9c70df217\",\n                            \"lessThan\": \"ce20f49ac9194cf81a77f01d1c316d7c17ae753c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9dc55f1389f9569acf9659e58dd836a9c70df217\",\n                            \"lessThan\": \"275b37a1e5c2c8abd313e8075f6aec9a349f291b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9dc55f1389f9569acf9659e58dd836a9c70df217\",\n                            \"lessThan\": \"b8c9f25fd84328c5fcc4f70c6d1e8f1d4787eaac\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9dc55f1389f9569acf9659e58dd836a9c70df217\",\n                            \"lessThan\": \"82b60ffbb532d919959702768dca04c3c0500ae5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9dc55f1389f9569acf9659e58dd836a9c70df217\",\n                            \"lessThan\": \"12053695c8ef5410e8cc6c9ed4c0db9cd9c82b3e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9dc55f1389f9569acf9659e58dd836a9c70df217\",\n                            \"lessThan\": \"142194fb21afe964d2d194cab1fc357cbf87e899\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9dc55f1389f9569acf9659e58dd836a9c70df217\",\n                            \"lessThan\": \"7aa6bc3e8766990824f66ca76c19596ce10daf3e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/iomap/buffered-io.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.19\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.19\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.267\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.218\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.185\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.120\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.64\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.3\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8,"severity":"CRITICAL"}],"references":["https://git.kernel.org/stable/c/ce20f49ac9194cf81a77f01d1c316d7c17ae753c","https://git.kernel.org/stable/c/275b37a1e5c2c8abd313e8075f6aec9a349f291b","https://git.kernel.org/stable/c/b8c9f25fd84328c5fcc4f70c6d1e8f1d4787eaac","https://git.kernel.org/stable/c/82b60ffbb532d919959702768dca04c3c0500ae5","https://git.kernel.org/stable/c/12053695c8ef5410e8cc6c9ed4c0db9cd9c82b3e","https://git.kernel.org/stable/c/142194fb21afe964d2d194cab1fc357cbf87e899","https://git.kernel.org/stable/c/7aa6bc3e8766990824f66ca76c19596ce10daf3e"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-68794","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-68794","identifiers":["CVE-2025-68794"]},"retained":false,"historicalAffected":[]}],"coverage":[]}