{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-53468 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2023-53468 is a medium-severity denial of service vulnerability in Linux kernel, published on 1 Oct 2025. 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-2023-53468 and fix it if it is affected.\n\nWhat it is: CVE-2023-53468 is a medium-severity denial of service vulnerability in Linux kernel, published on 1 Oct 2025. 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-2023-53468 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-2023-53468/ (Markdown: https://insights.sbomify.com/CVE-2023-53468/index.md)","id":"CVE-2023-53468","markdown":"https://insights.sbomify.com/CVE-2023-53468/index.md","name":"CVE-2023-53468","record":{"aliases":["BELL-CVE-2023-53468","DEBIAN-CVE-2023-53468","GHSA-rwqr-mq87-5p2c","UBUNTU-CVE-2023-53468"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A memory leak in the Linux kernel's UBIFS filesystem allows attackers to cause a denial of service by exhausting system memory during mount operations.","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-401","name":"Missing Release of Memory after Effective Lifetime"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nubifs: Fix memory leak in alloc_wbufs()\n\nkmemleak reported a sequence of memory leaks, and show them as following:\n\n  unreferenced object 0xffff8881575f8400 (size 1024):\n    comm \"mount\", pid 19625, jiffies 4297119604 (age 20.383s)\n    hex dump (first 32 bytes):\n      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    backtrace:\n      [\u003cffffffff8176cecd\u003e] __kmalloc+0x4d/0x150\n      [\u003cffffffffa0406b2b\u003e] ubifs_mount+0x307b/0x7170 [ubifs]\n      [\u003cffffffff819fa8fd\u003e] legacy_get_tree+0xed/0x1d0\n      [\u003cffffffff81936f2d\u003e] vfs_get_tree+0x7d/0x230\n      [\u003cffffffff819b2bd4\u003e] path_mount+0xdd4/0x17b0\n      [\u003cffffffff819b37aa\u003e] __x64_sys_mount+0x1fa/0x270\n      [\u003cffffffff83c14295\u003e] do_syscall_64+0x35/0x80\n      [\u003cffffffff83e0006a\u003e] entry_SYSCALL_64_after_hwframe+0x46/0xb0\n\n  unreferenced object 0xffff8881798a6e00 (size 512):\n    comm \"mount\", pid 19677, jiffies 4297121912 (age 37.816s)\n    hex dump (first 32 bytes):\n      6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk\n      6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk\n    backtrace:\n      [\u003cffffffff8176cecd\u003e] __kmalloc+0x4d/0x150\n      [\u003cffffffffa0418342\u003e] ubifs_wbuf_init+0x52/0x480 [ubifs]\n      [\u003cffffffffa0406ca5\u003e] ubifs_mount+0x31f5/0x7170 [ubifs]\n      [\u003cffffffff819fa8fd\u003e] legacy_get_tree+0xed/0x1d0\n      [\u003cffffffff81936f2d\u003e] vfs_get_tree+0x7d/0x230\n      [\u003cffffffff819b2bd4\u003e] path_mount+0xdd4/0x17b0\n      [\u003cffffffff819b37aa\u003e] __x64_sys_mount+0x1fa/0x270\n      [\u003cffffffff83c14295\u003e] do_syscall_64+0x35/0x80\n      [\u003cffffffff83e0006a\u003e] entry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nThe problem is that the ubifs_wbuf_init() returns an error in the\nloop which in the alloc_wbufs(), then the wbuf-\u003ebuf and wbuf-\u003einodes\nthat were successfully alloced before are not freed.\n\nFix it by adding error hanging path in alloc_wbufs() which frees\nthe memory alloced before when ubifs_wbuf_init() returns an error.","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":"ubifs: Fix memory leak in alloc_wbufs()","id":"CVE-2023-53468","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"denial_of_service","year":"2023"},"n_packages":0,"n_references":6,"next":{"headline":"This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.","id":"CVE-2023-53469"},"packages":[],"prev":{"headline":"wifi: rtw89: fix potential leak in rtw89_append_probe_req_ie()","id":"CVE-2023-53467"},"products":["Linux"],"published":"2025-10-01","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":"A memory leak in the Linux kernel's UBIFS filesystem allows attackers to cause a denial of service by exhausting system memory during mount operations.","url":"https://insights.sbomify.com/CVE-2023-53468/"}