{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-43323 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-43323 is a medium-severity denial of service vulnerability in Linux kernel, published on 8 May 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-2026-43323 and fix it if it is affected.\n\nWhat it is: CVE-2026-43323 is a medium-severity denial of service vulnerability in Linux kernel, published on 8 May 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-2026-43323 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-2026-43323/ (Markdown: https://insights.sbomify.com/CVE-2026-43323/index.md)","id":"CVE-2026-43323","markdown":"https://insights.sbomify.com/CVE-2026-43323/index.md","name":"CVE-2026-43323","record":{"aliases":["BELL-CVE-2026-43323","DEBIAN-CVE-2026-43323","GHSA-549j-xvh5-g4r6","UBUNTU-CVE-2026-43323"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel scheduler","requires_auth":"low_privilege","summary":"A flaw in the Linux kernel scheduler allows local attackers to cause system instability or denial of service via specific task yielding patterns.","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":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsched/fair: Fix zero_vruntime tracking fix\n\nJohn reported that stress-ng-yield could make his machine unhappy and\nmanaged to bisect it to commit b3d99f43c72b (\"sched/fair: Fix\nzero_vruntime tracking\").\n\nThe combination of yield and that commit was specific enough to\nhypothesize the following scenario:\n\nSuppose we have 2 runnable tasks, both doing yield. Then one will be\neligible and one will not be, because the average position must be in\nbetween these two entities.\n\nTherefore, the runnable task will be eligible, and be promoted a full\nslice (all the tasks do is yield after all). This causes it to jump over\nthe other task and now the other task is eligible and current is no\nlonger. So we schedule.\n\nSince we are runnable, there is no {de,en}queue. All we have is the\n__{en,de}queue_entity() from {put_prev,set_next}_task(). But per the\nfingered commit, those two no longer move zero_vruntime.\n\nAll that moves zero_vruntime are tick and full {de,en}queue.\n\nThis means, that if the two tasks playing leapfrog can reach the\ncritical speed to reach the overflow point inside one tick's worth of\ntime, we're up a creek.\n\nAdditionally, when multiple cgroups are involved, there is no guarantee\nthe tick will in fact hit every cgroup in a timely manner. Statistically\nspeaking it will, but that same statistics does not rule out the\npossibility of one cgroup not getting a tick for a significant amount of\ntime -- however unlikely.\n\nTherefore, just like with the yield() case, force an update at the end\nof every slice. This ensures the update is never more than a single\nslice behind and the whole thing is within 2 lag bounds as per the\ncomment on entity_key().","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":"sched/fair: Fix zero_vruntime tracking fix","id":"CVE-2026-43323","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":4,"next":{"headline":"USB: dummy-hcd: Fix interrupt synchronization error","id":"CVE-2026-43324"},"packages":[],"prev":{"headline":"Bluetooth: hci_sync: Fix UAF in le_read_features_complete","id":"CVE-2026-43322"},"products":["Linux"],"published":"2026-05-08","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":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-05-11","vendors":["Linux"]},"summary":"A flaw in the Linux kernel scheduler allows local attackers to cause system instability or denial of service via specific task yielding patterns.","url":"https://insights.sbomify.com/CVE-2026-43323/"}