{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-43186 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-43186 is a critical memory corruption vulnerability in Linux kernel, published on 6 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-43186 and fix it if it is affected.\n\nWhat it is: CVE-2026-43186 is a critical memory corruption vulnerability in Linux kernel, published on 6 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-43186 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-2026-43186/ (Markdown: https://insights.sbomify.com/CVE-2026-43186/index.md)","id":"CVE-2026-43186","markdown":"https://insights.sbomify.com/CVE-2026-43186/index.md","name":"CVE-2026-43186","record":{"aliases":["ALSA-2026:51295","BELL-CVE-2026-43186","DEBIAN-CVE-2026-43186","GHSA-8x8h-4g2v-qpf2","RHSA-2026:51295","RLSA-2026:51295","ROOT-OS-UBUNTU-2204-CVE-2026-43186","ROOT-OS-UBUNTU-2404-CVE-2026-43186","UBUNTU-CVE-2026-43186"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Linux kernel","requires_auth":"none","summary":"A crafted IPv6 packet triggers a heap buffer overflow in the Linux kernel's IOAM module, causing memory corruption and a kernel panic.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":9.8,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"},{"id":"CWE-122","name":"Heap-based Buffer Overflow"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: ioam: fix heap buffer overflow in __ioam6_fill_trace_data()\n\nOn the receive path, __ioam6_fill_trace_data() uses trace-\u003enodelen\nto decide how much data to write for each node. It trusts this field\nas-is from the incoming packet, with no consistency check against\ntrace-\u003etype (the 24-bit field that tells which data items are\npresent). A crafted packet can set nodelen=0 while setting type bits\n0-21, causing the function to write ~100 bytes past the allocated\nregion (into skb_shared_info), which corrupts adjacent heap memory\nand leads to a kernel panic.\n\nAdd a shared helper ioam6_trace_compute_nodelen() in ioam6.c to\nderive the expected nodelen from the type field, and use it:\n\n  - in ioam6_iptunnel.c (send path, existing validation) to replace\n    the open-coded computation;\n  - in exthdrs.c (receive path, ipv6_hop_ioam) to drop packets whose\n    nodelen is inconsistent with the type field, before any data is\n    written.\n\nPer RFC 9197, bits 12-21 are each short (4-octet) fields, so they\nare included in IOAM6_MASK_SHORT_FIELDS (changed from 0xff100000 to\n0xff1ffc00).","ecosystems":["AlmaLinux:10","Red Hat:enterprise_linux:10.2","Rocky Linux:10"],"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":"ipv6: ioam: fix heap buffer overflow in __ioam6_fill_trace_data()","id":"CVE-2026-43186","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"memory_corruption","year":"2026"},"n_packages":166,"n_references":7,"next":{"headline":"xfs: delete attr leaf freemap entries when empty","id":"CVE-2026-43187"},"packages":[{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel","purl":"pkg:rpm/almalinux/kernel","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k","purl":"pkg:rpm/almalinux/kernel-64k","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-core","purl":"pkg:rpm/almalinux/kernel-64k-core","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug","purl":"pkg:rpm/almalinux/kernel-64k-debug","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-core","purl":"pkg:rpm/almalinux/kernel-64k-debug-core","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-devel","purl":"pkg:rpm/almalinux/kernel-64k-debug-devel","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-devel-matched","purl":"pkg:rpm/almalinux/kernel-64k-debug-devel-matched","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-modules","purl":"pkg:rpm/almalinux/kernel-64k-debug-modules","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-modules-core","purl":"pkg:rpm/almalinux/kernel-64k-debug-modules-core","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-modules-extra","purl":"pkg:rpm/almalinux/kernel-64k-debug-modules-extra","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-devel","purl":"pkg:rpm/almalinux/kernel-64k-devel","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-devel-matched","purl":"pkg:rpm/almalinux/kernel-64k-devel-matched","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-modules","purl":"pkg:rpm/almalinux/kernel-64k-modules","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-modules-core","purl":"pkg:rpm/almalinux/kernel-64k-modules-core","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-modules-extra","purl":"pkg:rpm/almalinux/kernel-64k-modules-extra","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-abi-stablelists","purl":"pkg:rpm/almalinux/kernel-abi-stablelists","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-core","purl":"pkg:rpm/almalinux/kernel-core","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-cross-headers","purl":"pkg:rpm/almalinux/kernel-cross-headers","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-debug","purl":"pkg:rpm/almalinux/kernel-debug","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-core","purl":"pkg:rpm/almalinux/kernel-debug-core","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-devel","purl":"pkg:rpm/almalinux/kernel-debug-devel","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-devel-matched","purl":"pkg:rpm/almalinux/kernel-debug-devel-matched","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-modules","purl":"pkg:rpm/almalinux/kernel-debug-modules","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-modules-core","purl":"pkg:rpm/almalinux/kernel-debug-modules-core","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-modules-extra","purl":"pkg:rpm/almalinux/kernel-debug-modules-extra","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-uki-virt","purl":"pkg:rpm/almalinux/kernel-debug-uki-virt","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-devel","purl":"pkg:rpm/almalinux/kernel-devel","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-devel-matched","purl":"pkg:rpm/almalinux/kernel-devel-matched","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-doc","purl":"pkg:rpm/almalinux/kernel-doc","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-headers","purl":"pkg:rpm/almalinux/kernel-headers","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-modules","purl":"pkg:rpm/almalinux/kernel-modules","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-modules-core","purl":"pkg:rpm/almalinux/kernel-modules-core","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-modules-extra","purl":"pkg:rpm/almalinux/kernel-modules-extra","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-modules-extra-matched","purl":"pkg:rpm/almalinux/kernel-modules-extra-matched","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-rt","purl":"pkg:rpm/almalinux/kernel-rt","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-rt-64k","purl":"pkg:rpm/almalinux/kernel-rt-64k","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-rt-64k-core","purl":"pkg:rpm/almalinux/kernel-rt-64k-core","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-rt-64k-debug","purl":"pkg:rpm/almalinux/kernel-rt-64k-debug","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-rt-64k-debug-core","purl":"pkg:rpm/almalinux/kernel-rt-64k-debug-core","source":"ALSA-2026:51295"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.44.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-rt-64k-debug-devel","purl":"pkg:rpm/almalinux/kernel-rt-64k-debug-devel","source":"ALSA-2026:51295"}],"prev":{"headline":"ksmbd: fix signededness bug in smb_direct_prepare_negotiation()","id":"CVE-2026-43185"},"products":["Linux"],"published":"2026-05-06","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":"MIT","name":"AlmaLinux","prefix":"ALSA"},{"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":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-19","vendors":["Linux"]},"summary":"A crafted IPv6 packet triggers a heap buffer overflow in the Linux kernel's IOAM module, causing memory corruption and a kernel panic.","url":"https://insights.sbomify.com/CVE-2026-43186/"}