{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-22998 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-22998 is a high-severity vulnerability in Linux kernel, published on 25 Jan 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-2026-22998 and fix it if it is affected.\n\nWhat it is: CVE-2026-22998 is a high-severity vulnerability in Linux kernel, published on 25 Jan 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-2026-22998 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-2026-22998/ (Markdown: https://insights.sbomify.com/CVE-2026-22998/index.md)","id":"CVE-2026-22998","markdown":"https://insights.sbomify.com/CVE-2026-22998/index.md","name":"CVE-2026-22998","record":{"aliases":["AZL-78482","AZL-78491","BELL-CVE-2026-22998","DEBIAN-CVE-2026-22998","GHSA-xjx5-8v38-q6gh","ROOT-OS-DEBIAN-11-CVE-2026-22998","ROOT-OS-DEBIAN-12-CVE-2026-22998","ROOT-OS-DEBIAN-13-CVE-2026-22998","ROOT-OS-UBUNTU-2204-CVE-2026-22998","ROOT-OS-UBUNTU-2404-CVE-2026-22998","UBUNTU-CVE-2026-22998"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Linux kernel NVMe-TCP","requires_auth":"none","summary":"A remote attacker can cause a kernel crash by sending malformed NVMe-TCP PDUs before proper initialization, affecting Linux systems using NVMe over TCP.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-tcp: fix NULL pointer dereferences in nvmet_tcp_build_pdu_iovec\n\nCommit efa56305908b (\"nvmet-tcp: Fix a kernel panic when host sends an invalid H2C PDU length\")\nadded ttag bounds checking and data_offset\nvalidation in nvmet_tcp_handle_h2c_data_pdu(), but it did not validate\nwhether the command's data structures (cmd-\u003ereq.sg and cmd-\u003eiov) have\nbeen properly initialized before processing H2C_DATA PDUs.\n\nThe nvmet_tcp_build_pdu_iovec() function dereferences these pointers\nwithout NULL checks. This can be triggered by sending H2C_DATA PDU\nimmediately after the ICREQ/ICRESP handshake, before\nsending a CONNECT command or NVMe write command.\n\nAttack vectors that trigger NULL pointer dereferences:\n1. H2C_DATA PDU sent before CONNECT → both pointers NULL\n2. H2C_DATA PDU for READ command → cmd-\u003ereq.sg allocated, cmd-\u003eiov NULL\n3. H2C_DATA PDU for uninitialized command slot → both pointers NULL\n\nThe fix validates both cmd-\u003ereq.sg and cmd-\u003eiov before calling\nnvmet_tcp_build_pdu_iovec(). Both checks are required because:\n- Uninitialized commands: both NULL\n- READ commands: cmd-\u003ereq.sg allocated, cmd-\u003eiov NULL\n- WRITE commands: both allocated","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":"nvme-tcp: fix NULL pointer dereferences in nvmet_tcp_build_pdu_iovec","id":"CVE-2026-22998","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"null_dereference","year":"2026"},"n_packages":0,"n_references":7,"next":{"headline":"net/sched: sch_qfq: do not free existing class in qfq_change_class()","id":"CVE-2026-22999"},"packages":[],"prev":{"headline":"net: can: j1939: j1939_xtp_rx_rts_session_active(): deactivate session upon receiving the second rts","id":"CVE-2026-22997"},"products":["Linux"],"published":"2026-01-25","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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-19","vendors":["Linux"]},"summary":"A remote attacker can cause a kernel crash by sending malformed NVMe-TCP PDUs before proper initialization, affecting Linux systems using NVMe over TCP.","url":"https://insights.sbomify.com/CVE-2026-22998/"}