{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2023-54313 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2023-54313 is a vulnerability in Linux, published on 30 Dec 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-2023-54313 and fix it if it is affected.\n\nWhat it is: CVE-2023-54313 is a vulnerability in Linux, published on 30 Dec 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-2023-54313 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-2023-54313/ (Markdown: https://insights.sbomify.com/CVE-2023-54313/index.md)","id":"CVE-2023-54313","markdown":"https://insights.sbomify.com/CVE-2023-54313/index.md","name":"CVE-2023-54313","record":{"aliases":["BELL-CVE-2023-54313","DEBIAN-CVE-2023-54313","GHSA-5fqh-8g63-525q","UBUNTU-CVE-2023-54313"],"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 local attacker can trigger a null pointer dereference in the Linux kernel's overlayfs, causing a system crash.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\novl: fix null pointer dereference in ovl_get_acl_rcu()\n\nFollowing process:\n         P1                     P2\n path_openat\n  link_path_walk\n   may_lookup\n    inode_permission(rcu)\n     ovl_permission\n      acl_permission_check\n       check_acl\n        get_cached_acl_rcu\n\t ovl_get_inode_acl\n\t  realinode = ovl_inode_real(ovl_inode)\n\t                      drop_cache\n\t\t               __dentry_kill(ovl_dentry)\n\t\t\t\tiput(ovl_inode)\n\t\t                 ovl_destroy_inode(ovl_inode)\n\t\t                  dput(oi-\u003e__upperdentry)\n\t\t                   dentry_kill(upperdentry)\n\t\t                    dentry_unlink_inode\n\t\t\t\t     upperdentry-\u003ed_inode = NULL\n\t    ovl_inode_upper\n\t     upperdentry = ovl_i_dentry_upper(ovl_inode)\n\t     d_inode(upperdentry) // returns NULL\n\t  IS_POSIXACL(realinode) // NULL pointer dereference\n, will trigger an null pointer dereference at realinode:\n  [  205.472797] BUG: kernel NULL pointer dereference, address:\n                 0000000000000028\n  [  205.476701] CPU: 2 PID: 2713 Comm: ls Not tainted\n                 6.3.0-12064-g2edfa098e750-dirty #1216\n  [  205.478754] RIP: 0010:do_ovl_get_acl+0x5d/0x300\n  [  205.489584] Call Trace:\n  [  205.489812]  \u003cTASK\u003e\n  [  205.490014]  ovl_get_inode_acl+0x26/0x30\n  [  205.490466]  get_cached_acl_rcu+0x61/0xa0\n  [  205.490908]  generic_permission+0x1bf/0x4e0\n  [  205.491447]  ovl_permission+0x79/0x1b0\n  [  205.491917]  inode_permission+0x15e/0x2c0\n  [  205.492425]  link_path_walk+0x115/0x550\n  [  205.493311]  path_lookupat.isra.0+0xb2/0x200\n  [  205.493803]  filename_lookup+0xda/0x240\n  [  205.495747]  vfs_fstatat+0x7b/0xb0\n\nFetch a reproducer in [Link].\n\nUse the helper ovl_i_path_realinode() to get realinode and then do\nnon-nullptr checking.","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":"ovl: fix null pointer dereference in ovl_get_acl_rcu()","id":"CVE-2023-54313","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"null_dereference","year":"2023"},"n_packages":0,"n_references":4,"next":{"headline":"media: af9005: Fix null-ptr-deref in af9005_i2c_xfer","id":"CVE-2023-54314"},"packages":[],"prev":{"headline":"samples/bpf: Fix buffer overflow in tcp_basertt","id":"CVE-2023-54312"},"products":["Linux"],"published":"2025-12-30","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-05-11","vendors":["Linux"]},"summary":"A local attacker can trigger a null pointer dereference in the Linux kernel's overlayfs, causing a system crash.","url":"https://insights.sbomify.com/CVE-2023-54313/"}