{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-23235 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-23235 is a high-severity memory corruption vulnerability in Linux kernel, published on 4 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-23235 and fix it if it is affected.\n\nWhat it is: CVE-2026-23235 is a high-severity memory corruption vulnerability in Linux kernel, published on 4 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-23235 in the wild and no public exploit code.\n\nAffected product: Linux kernel. 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-2026-23235/ (Markdown: https://insights.sbomify.com/CVE-2026-23235/index.md)","id":"CVE-2026-23235","markdown":"https://insights.sbomify.com/CVE-2026-23235/index.md","name":"CVE-2026-23235","record":{"aliases":["BELL-CVE-2026-23235","DEBIAN-CVE-2026-23235","GHSA-39w6-g297-pmf5","ROOT-OS-DEBIAN-11-CVE-2026-23235","ROOT-OS-DEBIAN-12-CVE-2026-23235","ROOT-OS-DEBIAN-13-CVE-2026-23235","ROOT-OS-UBUNTU-2204-CVE-2026-23235","ROOT-OS-UBUNTU-2404-CVE-2026-23235","UBUNTU-CVE-2026-23235"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel f2fs","requires_auth":"low_privilege","summary":"An out-of-bounds memory access in the Linux kernel f2fs sysfs interface allows attackers to cause memory corruption, potentially leading to code execution or system crashes.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":7.1,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-125","name":"Out-of-bounds Read"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix out-of-bounds access in sysfs attribute read/write\n\nSome f2fs sysfs attributes suffer from out-of-bounds memory access and\nincorrect handling of integer values whose size is not 4 bytes.\n\nFor example:\nvm:~# echo 65537 \u003e /sys/fs/f2fs/vde/carve_out\nvm:~# cat /sys/fs/f2fs/vde/carve_out\n65537\nvm:~# echo 4294967297 \u003e /sys/fs/f2fs/vde/atgc_age_threshold\nvm:~# cat /sys/fs/f2fs/vde/atgc_age_threshold\n1\n\ncarve_out maps to {struct f2fs_sb_info}-\u003ecarve_out, which is a 8-bit\ninteger. However, the sysfs interface allows setting it to a value\nlarger than 255, resulting in an out-of-range update.\n\natgc_age_threshold maps to {struct atgc_management}-\u003eage_threshold,\nwhich is a 64-bit integer, but its sysfs interface cannot correctly set\nvalues larger than UINT_MAX.\n\nThe root causes are:\n1. __sbi_store() treats all default values as unsigned int, which\nprevents updating integers larger than 4 bytes and causes out-of-bounds\nwrites for integers smaller than 4 bytes.\n\n2. f2fs_sbi_show() also assumes all default values are unsigned int,\nleading to out-of-bounds reads and incorrect access to integers larger\nthan 4 bytes.\n\nThis patch introduces {struct f2fs_attr}-\u003esize to record the actual size\nof the integer associated with each sysfs attribute. With this\ninformation, sysfs read and write operations can correctly access and\nupdate values according to their real data size, avoiding memory\ncorruption and truncation.","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":"f2fs: fix out-of-bounds access in sysfs attribute read/write","id":"CVE-2026-23235","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":8,"next":{"headline":"fbdev: smscufx: properly copy ioctl memory to kernelspace","id":"CVE-2026-23236"},"packages":[],"prev":{"headline":"f2fs: fix to avoid UAF in f2fs_write_end_io()","id":"CVE-2026-23234"},"products":["Linux"],"published":"2026-03-04","related":[{"cvss_score":8.8,"headline":"Linux Kernel Out-of-Bounds Write","id":"CVE-2026-53266","kev_date_added":"2026-09-18","published":"2026-06-25"},{"cvss_score":8.8,"headline":"Linux Kernel Improper Input Validation","id":"CVE-2013-6282","kev_date_added":"2022-09-15","published":"2013-11-19"},{"cvss_score":8.4,"headline":"Linux Kernel Heap-Based Buffer Overflow","id":"CVE-2022-0185","kev_date_added":"2024-08-21","published":"2022-02-11"},{"cvss_score":8.4,"headline":"Linux Kernel Privilege Escalation","id":"CVE-2013-2094","kev_date_added":"2022-09-15","published":"2013-05-14"},{"cvss_score":7.8,"headline":"Linux Kernel Unspecified","id":"CVE-2026-53362","kev_date_added":"2026-08-27","published":"2026-07-04"},{"cvss_score":7.8,"headline":"Linux Kernel Missing Initialization of a Variable","id":"CVE-2026-46300","kev_date_added":"2026-10-28","published":"2026-05-23"},{"cvss_score":7.8,"headline":"Linux Kernel Race Condition","id":"CVE-2025-39964","kev_date_added":"2026-09-18","published":"2025-10-13"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-05-11","vendors":["Linux"]},"summary":"An out-of-bounds memory access in the Linux kernel f2fs sysfs interface allows attackers to cause memory corruption, potentially leading to code execution or system crashes.","url":"https://insights.sbomify.com/CVE-2026-23235/"}