{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-98414 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-98414 is a denial of service vulnerability in Linux, published on 14 Oct 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-2026-98414 and fix it if it is affected.\n\nWhat it is: CVE-2026-98414 is a denial of service vulnerability in Linux, published on 14 Oct 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-2026-98414 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-2026-98414/ (Markdown: https://insights.sbomify.com/CVE-2026-98414/index.md)","id":"CVE-2026-98414","markdown":"https://insights.sbomify.com/CVE-2026-98414/index.md","name":"CVE-2026-98414","record":{"aliases":["BELL-CVE-2026-98414","DEBIAN-CVE-2026-98414","GHSA-5rph-2x3f-gv5r","UBUNTU-CVE-2026-98414"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A local attacker can trigger a kernel warning and memory counter leak in the Linux kernel's memory control group subsystem by exploiting zswap and cgroup reparenting logic.","user_interaction":"not_required","vuln_class":"denial_of_service"},"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\nmemcg: avoid charging the root memcg from obj_cgroup_charge_pages()\n\nobj_cgroup_charge_pages() resolves the objcg to its memcg and calls\ntry_charge_memcg(), which does not short circuit the root memcg.  That\nmemcg can be the root memcg: obj_cgroup_is_root() reflects the memcg the\nobjcg was created for and is never updated, while memcg_reparent_objcgs()\ndoes redirect objcg-\u003ememcg to the parent on rmdir.  An objcg of a dying\nchild of root therefore passes every obj_cgroup_is_root() filter but\nresolves to the root memcg.\n\nFolios keep the objcg they were charged with, so this is easy to reach\nthrough zswap: allocate anon memory in a cgroup, move the task out, remove\nthe cgroup, then write to the root cgroup's memory.reclaim.  The reclaimed\nfolios are charged through the reparented objcg and end up in\nrefill_stock() with the root memcg:\n\n  WARNING: mm/memcontrol.c:2198 at refill_stock+0x644/0x940\n   refill_stock+0x644/0x940\n   try_charge_memcg+0x12d6/0x1570\n   __obj_cgroup_charge+0x35/0xf0\n   obj_cgroup_charge+0x1de/0x210\n   obj_cgroup_charge_zswap+0x83/0x270\n   zswap_store+0x1620/0x2000\n   swap_writeout+0x94c/0x14c0\n   shrink_folio_list+0x3388/0x52b0\n   [...]\n   try_to_free_mem_cgroup_pages+0x30d/0x830\n   user_proactive_reclaim+0x504/0x840\n   memory_reclaim+0x1f/0x30\n\nBeyond the warning, the charge is asymmetric: obj_cgroup_uncharge_pages()\nskips refill_stock() for the root memcg, so the root's page counter grows\nand is never uncharged.  It is not user visible, since memory.current is\nnot exposed on the root, but it is a leak.\n\nUse try_charge(), which returns early for the root memcg, restoring the\nsymmetry with obj_cgroup_uncharge_pages().\n\nThe above sequence was scripted into a standalone reproducer (zswap on,\nswap on a virtio disk, 512MB of anon memory faulted in inside a child of\nthe root cgroup, the task then migrated to the root cgroup, the child\nremoved, followed by \"echo 600M swappiness=max \u003e memory.reclaim\" on the\nroot) and run in a CONFIG_DEBUG_VM=y VM.  It reproduces the splat on the\nfirst zswap store of a reparented folio, with the same call chain as the\nreport.  With this patch applied the splat is gone while the zswap store\ncount over the run is unchanged, so the same path is still exercised. \ncgroup selftests test_zswap, test_kmem and test_memcontrol show no new\nfailures.","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":"memcg: avoid charging the root memcg from obj_cgroup_charge_pages()","id":"CVE-2026-98414","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"soc: samsung: exynos-pmu: fix use-after-free of interrupt generator node","id":"CVE-2026-98415"},"packages":[],"prev":{"headline":"selinux: always fill AVC decision in avc_has_perm_noaudit()","id":"CVE-2026-98413"},"products":["Linux"],"published":"2026-10-14","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":"2026-10-19","vendors":["Linux"]},"summary":"A local attacker can trigger a kernel warning and memory counter leak in the Linux kernel's memory control group subsystem by exploiting zswap and cgroup reparenting logic.","url":"https://insights.sbomify.com/CVE-2026-98414/"}