{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-43494 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-43494 is a high-severity use after free vulnerability in Linux kernel, published on 21 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-2026-43494 and fix it if it is affected.\n\nWhat it is: CVE-2026-43494 is a high-severity use after free vulnerability in Linux kernel, published on 21 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-2026-43494 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-2026-43494/ (Markdown: https://insights.sbomify.com/CVE-2026-43494/index.md)","id":"CVE-2026-43494","markdown":"https://insights.sbomify.com/CVE-2026-43494/index.md","name":"CVE-2026-43494","record":{"aliases":["AZL-87083","BELL-CVE-2026-43494","DEBIAN-CVE-2026-43494","GHSA-m5w6-2mrp-4227","ROOT-OS-DEBIAN-11-CVE-2026-43494","ROOT-OS-DEBIAN-12-CVE-2026-43494","ROOT-OS-DEBIAN-13-CVE-2026-43494","UBUNTU-CVE-2026-43494"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A use-after-free vulnerability in the Linux kernel RDS module allows attackers to execute arbitrary code or escalate privileges via crafted network messages.","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-1341","name":"Multiple Releases of Same Resource or Handle"},{"id":"CWE-415","name":"Double Free"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/rds: reset op_nents when zerocopy page pin fails\n\nWhen iov_iter_get_pages2() fails in rds_message_zcopy_from_user(),\nthe pinned pages are released with put_page(), and\nrm-\u003edata.op_mmp_znotifier is cleared.  But we fail to properly\nclear rm-\u003edata.op_nents.\n\nLater when rds_message_purge() is called from rds_sendmsg() the\ncleanup loop iterates over the incorrectly non zero number of\nop_nents and frees them again.\n\nFix this by properly resetting op_nents when it should be in\nrds_message_zcopy_from_user().","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-05-20","github_poc":7,"max_poc_stars":2,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-05-22T19:29:17Z","kind":"github_poc","ref":"https://github.com/0xredash/CVE-2026-43494","stars":2,"title":"CVE-2026-43494"},{"date":"2026-05-25T07:45:54Z","kind":"github_poc","ref":"https://github.com/jayhutajulu1/CVE-2026-43494-PinTheft-PoC","stars":1,"title":"Proof-of-concept for CVE-2026-43494 (PinTheft): Linux LPE via RDS zerocopy refcount bug + io_uring fixed buffers → SUID page-cache overwrite. Authorized research only."},{"date":"2026-05-28T09:06:56Z","kind":"github_poc","ref":"https://github.com/Koshmare-Blossom/PinTheft-asm","stars":1,"title":"A x86_64 ASM implementation of PinTheft (CVE-2026-43494)"},{"date":"2026-05-30T11:44:56Z","kind":"github_poc","ref":"https://github.com/letsr00t/CVE-2026-43494-PinTheft-PoC","stars":1,"title":null},{"date":"2026-05-20T08:06:24Z","kind":"github_poc","ref":"https://github.com/suominen/pintheft","stars":0,"title":"Tracking PinTheft (CVE-2026-43494, CVE-2026-43502), the RDS zerocopy double-free privilege escalation"},{"date":"2026-05-22T21:49:30Z","kind":"github_poc","ref":"https://github.com/Kagantua/PinTheft-go","stars":0,"title":"A Go implementation of PinTheft (CVE-2026-43494)"},{"date":"2026-05-25T11:35:47Z","kind":"github_poc","ref":"https://github.com/tanzz1337/CVE-2026-43494-PinTheft-PoC","stars":0,"title":"Proof-of-concept for CVE-2026-43494 (PinTheft): Linux LPE via RDS zerocopy refcount bug + io_uring fixed buffers → SUID page-cache overwrite. Authorized research only."}],"tier":"poc_unverified"},"has_fix":true,"headline":"net/rds: reset op_nents when zerocopy page pin fails","id":"CVE-2026-43494","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"use_after_free","year":"2026"},"n_packages":0,"n_references":9,"next":{"headline":"net: wwan: t7xx: validate port_count against message length in t7xx_port_enum_msg_handler","id":"CVE-2026-43495"},"packages":[],"prev":{"headline":"crypto: pcrypt - Fix handling of MAY_BACKLOG requests","id":"CVE-2026-43493"},"products":["Linux"],"published":"2026-05-21","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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-19","vendors":["Linux"]},"summary":"A use-after-free vulnerability in the Linux kernel RDS module allows attackers to execute arbitrary code or escalate privileges via crafted network messages.","url":"https://insights.sbomify.com/CVE-2026-43494/"}