{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-53039 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-53039 is a medium-severity denial of service vulnerability in Linux kernel, published on 24 Jun 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-2026-53039 and fix it if it is affected.\n\nWhat it is: CVE-2026-53039 is a medium-severity denial of service vulnerability in Linux kernel, published on 24 Jun 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-2026-53039 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-2026-53039/ (Markdown: https://insights.sbomify.com/CVE-2026-53039/index.md)","id":"CVE-2026-53039","markdown":"https://insights.sbomify.com/CVE-2026-53039/index.md","name":"CVE-2026-53039","record":{"aliases":["BELL-CVE-2026-53039","DEBIAN-CVE-2026-53039","GHSA-5p4x-7qqv-q472","ROOT-OS-DEBIAN-11-CVE-2026-53039","ROOT-OS-DEBIAN-12-CVE-2026-53039","ROOT-OS-UBUNTU-2204-CVE-2026-53039","ROOT-OS-UBUNTU-2404-CVE-2026-53039","UBUNTU-CVE-2026-53039"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel OCFS2","requires_auth":"low_privilege","summary":"A local attacker can trigger a kernel BUG_ON crash in the OCFS2 filesystem by passing invalid input to the group add ioctl, causing a denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":5.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-617","name":"Reachable Assertion"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: validate group add input before caching\n\n[BUG]\nOCFS2_IOC_GROUP_ADD can trigger a BUG_ON in\nocfs2_set_new_buffer_uptodate():\n\nkernel BUG at fs/ocfs2/uptodate.c:509!\nOops: invalid opcode: 0000 [#1] SMP KASAN NOPTI\nRIP: 0010:ocfs2_set_new_buffer_uptodate+0x194/0x1e0 fs/ocfs2/uptodate.c:509\nCode: ffffe88f 42b9fe4c 89e64889 dfe8b4df\nCall Trace:\n ocfs2_group_add+0x3f1/0x1510 fs/ocfs2/resize.c:507\n ocfs2_ioctl+0x309/0x6e0 fs/ocfs2/ioctl.c:887\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:597 [inline]\n __se_sys_ioctl fs/ioctl.c:583 [inline]\n __x64_sys_ioctl+0x197/0x1e0 fs/ioctl.c:583\n x64_sys_call+0x1144/0x26a0 arch/x86/include/generated/asm/syscalls_64.h:17\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0x93/0xf80 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\nRIP: 0033:0x7bbfb55a966d\n\n[CAUSE]\nocfs2_group_add() calls ocfs2_set_new_buffer_uptodate() on a\nuser-controlled group block before ocfs2_verify_group_and_input()\nvalidates that block number. That helper is only valid for newly\nallocated metadata and asserts that the block is not already present in\nthe chosen metadata cache. The code also uses INODE_CACHE(inode) even\nthough the group descriptor belongs to main_bm_inode and later journal\naccesses use that cache context instead.\n\n[FIX]\nValidate the on-disk group descriptor before caching it, then add it to\nthe metadata cache tracked by INODE_CACHE(main_bm_inode). Keep the\nvalidation failure path separate from the later cleanup path so we only\nremove the buffer from that cache after it has actually been inserted.\nThis keeps the group buffer lifetime consistent across validation,\njournaling, and cleanup.","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":"ocfs2: validate group add input before caching","id":"CVE-2026-53039","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":8,"next":{"headline":"ocfs2: validate bg_bits during freefrag scan","id":"CVE-2026-53040"},"packages":[],"prev":{"headline":"ima_fs: Correctly create securityfs files for unsupported hash algos","id":"CVE-2026-53038"},"products":["Linux"],"published":"2026-06-24","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":"2026-06-24","vendors":["Linux"]},"summary":"A local attacker can trigger a kernel BUG_ON crash in the OCFS2 filesystem by passing invalid input to the group add ioctl, causing a denial of service.","url":"https://insights.sbomify.com/CVE-2026-53039/"}