{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-68794 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-68794 is a critical vulnerability in Linux, published on 13 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-68794 and fix it if it is affected.\n\nWhat it is: CVE-2025-68794 is a critical vulnerability in Linux, published on 13 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2025-68794 in the wild and no public exploit code.\n\nAffected product: Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2025-68794/ (Markdown: https://insights.sbomify.com/CVE-2025-68794/index.md)","id":"CVE-2025-68794","markdown":"https://insights.sbomify.com/CVE-2025-68794/index.md","name":"CVE-2025-68794","record":{"aliases":["AZL-74483","BELL-CVE-2025-68794","DEBIAN-CVE-2025-68794","GHSA-3c24-c79w-qw24","ROOT-OS-DEBIAN-11-CVE-2025-68794","ROOT-OS-DEBIAN-12-CVE-2025-68794","ROOT-OS-UBUNTU-2204-CVE-2025-68794","ROOT-OS-UBUNTU-2404-CVE-2025-68794","UBUNTU-CVE-2025-68794"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Linux kernel","requires_auth":"none","summary":"An integer underflow in the Linux kernel iomap subsystem can cause incorrect read ranges, potentially leading to a denial of service.","user_interaction":"not_required","vuln_class":"integer_overflow"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":9.8,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-190","name":"Integer Overflow or Wraparound"}],"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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"iomap: adjust read range correctly for non-block-aligned positions","id":"CVE-2025-68794","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"integer_overflow","year":"2025"},"n_packages":0,"n_references":7,"next":{"headline":"ethtool: Avoid overflowing userspace buffer on stats query","id":"CVE-2025-68795"},"packages":[],"prev":{"headline":"drm/amdgpu: fix a job-\u003epasid access race in gpu recovery","id":"CVE-2025-68793"},"products":["Linux"],"published":"2026-01-13","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-19","vendors":["Linux"]},"summary":"An integer underflow in the Linux kernel iomap subsystem can cause incorrect read ranges, potentially leading to a denial of service.","url":"https://insights.sbomify.com/CVE-2025-68794/"}