{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-52486 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2023-52486 is a high-severity use after free vulnerability in Linux kernel, published on 29 Feb 2024. 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-2023-52486 and fix it if it is affected.\n\nWhat it is: CVE-2023-52486 is a high-severity use after free vulnerability in Linux kernel, published on 29 Feb 2024. 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-2023-52486 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-2023-52486/ (Markdown: https://insights.sbomify.com/CVE-2023-52486/index.md)","id":"CVE-2023-52486","markdown":"https://insights.sbomify.com/CVE-2023-52486/index.md","name":"CVE-2023-52486","record":{"aliases":["BELL-CVE-2023-52486","DEBIAN-CVE-2023-52486","GHSA-ph55-5xqf-59r7","UBUNTU-CVE-2023-52486"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service","code_execution"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Linux kernel DRM","requires_auth":"low_privilege","summary":"A use-after-free vulnerability in the Linux kernel DRM subsystem allows attackers to cause denial of service or potentially execute code via improper framebuffer reference counting during deadlock handling.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-667","name":"Improper Locking"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm: Don't unref the same fb many times by mistake due to deadlock handling\n\nIf we get a deadlock after the fb lookup in drm_mode_page_flip_ioctl()\nwe proceed to unref the fb and then retry the whole thing from the top.\nBut we forget to reset the fb pointer back to NULL, and so if we then\nget another error during the retry, before the fb lookup, we proceed\nthe unref the same fb again without having gotten another reference.\nThe end result is that the fb will (eventually) end up being freed\nwhile it's still in use.\n\nReset fb to NULL once we've unreffed it to avoid doing it again\nuntil we've done another fb lookup.\n\nThis turned out to be pretty easy to hit on a DG2 when doing async\nflips (and CONFIG_DEBUG_WW_MUTEX_SLOWPATH=y). The first symptom I\nsaw that drm_closefb() simply got stuck in a busy loop while walking\nthe framebuffer list. Fortunately I was able to convince it to oops\ninstead, and from there it was easier to track down the culprit.","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":"drm: Don't unref the same fb many times by mistake due to deadlock handling","id":"CVE-2023-52486","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"use_after_free","year":"2023"},"n_packages":0,"n_references":8,"next":{"headline":"net/mlx5e: Fix peer flow lists handling","id":"CVE-2023-52487"},"packages":[],"prev":{"headline":"drm/amd/display: Wake DMCUB before sending a command","id":"CVE-2023-52485"},"products":["Linux"],"published":"2024-02-29","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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-05","vendors":["Linux"]},"summary":"A use-after-free vulnerability in the Linux kernel DRM subsystem allows attackers to cause denial of service or potentially execute code via improper framebuffer reference counting during deadlock handling.","url":"https://insights.sbomify.com/CVE-2023-52486/"}