{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-40281 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-40281 is a vulnerability in Linux, published on 6 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-40281 and fix it if it is affected.\n\nWhat it is: CVE-2025-40281 is a vulnerability in Linux, published on 6 Dec 2025. 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-2025-40281 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-2025-40281/ (Markdown: https://insights.sbomify.com/CVE-2025-40281/index.md)","id":"CVE-2025-40281","markdown":"https://insights.sbomify.com/CVE-2025-40281/index.md","name":"CVE-2025-40281","record":{"aliases":["BELL-CVE-2025-40281","DEBIAN-CVE-2025-40281","GHSA-mgqw-v2hw-3wq7","ROOT-OS-DEBIAN-12-CVE-2025-40281","ROOT-OS-DEBIAN-13-CVE-2025-40281","ROOT-OS-UBUNTU-2204-CVE-2025-40281","ROOT-OS-UBUNTU-2404-CVE-2025-40281","UBUNTU-CVE-2025-40281"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Linux kernel SCTP","requires_auth":"none","summary":"A shift-out-of-bounds error in the Linux kernel SCTP implementation allows remote attackers to cause a denial of service via crafted network packets.","user_interaction":"not_required","vuln_class":"integer_overflow"},"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\nsctp: prevent possible shift-out-of-bounds in sctp_transport_update_rto\n\nsyzbot reported a possible shift-out-of-bounds [1]\n\nBlamed commit added rto_alpha_max and rto_beta_max set to 1000.\n\nIt is unclear if some sctp users are setting very large rto_alpha\nand/or rto_beta.\n\nIn order to prevent user regression, perform the test at run time.\n\nAlso add READ_ONCE() annotations as sysctl values can change under us.\n\n[1]\n\nUBSAN: shift-out-of-bounds in net/sctp/transport.c:509:41\nshift exponent 64 is too large for 32-bit type 'unsigned int'\nCPU: 0 UID: 0 PID: 16704 Comm: syz.2.2320 Not tainted syzkaller #0 PREEMPT(full)\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025\nCall Trace:\n \u003cTASK\u003e\n  __dump_stack lib/dump_stack.c:94 [inline]\n  dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120\n  ubsan_epilogue lib/ubsan.c:233 [inline]\n  __ubsan_handle_shift_out_of_bounds+0x27f/0x420 lib/ubsan.c:494\n  sctp_transport_update_rto.cold+0x1c/0x34b net/sctp/transport.c:509\n  sctp_check_transmitted+0x11c4/0x1c30 net/sctp/outqueue.c:1502\n  sctp_outq_sack+0x4ef/0x1b20 net/sctp/outqueue.c:1338\n  sctp_cmd_process_sack net/sctp/sm_sideeffect.c:840 [inline]\n  sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1372 [inline]","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":"sctp: prevent possible shift-out-of-bounds in sctp_transport_update_rto","id":"CVE-2025-40281","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"integer_overflow","year":"2025"},"n_packages":0,"n_references":8,"next":{"headline":"Bluetooth: 6lowpan: reset link-local header on ipv6 recv path","id":"CVE-2025-40282"},"packages":[],"prev":{"headline":"tipc: Fix use-after-free in tipc_mon_reinit_self().","id":"CVE-2025-40280"},"products":["Linux"],"published":"2025-12-06","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-16","vendors":["Linux"]},"summary":"A shift-out-of-bounds error in the Linux kernel SCTP implementation allows remote attackers to cause a denial of service via crafted network packets.","url":"https://insights.sbomify.com/CVE-2025-40281/"}