{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-98300 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-98300 is a vulnerability in Linux, published on 6 Oct 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-2026-98300 and fix it if it is affected.\n\nWhat it is: CVE-2026-98300 is a vulnerability in Linux, published on 6 Oct 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-2026-98300 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-2026-98300/ (Markdown: https://insights.sbomify.com/CVE-2026-98300/index.md)","id":"CVE-2026-98300","markdown":"https://insights.sbomify.com/CVE-2026-98300/index.md","name":"CVE-2026-98300","record":{"aliases":["AZL-106080","BELL-CVE-2026-98300","DEBIAN-CVE-2026-98300","GHSA-jr77-63hq-vhgr","UBUNTU-CVE-2026-98300"],"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 race condition in the Linux kernel TCP IPv6 receive path can cause a kernel warning and potential denial of service when a listener is closed concurrently.","user_interaction":"not_required","vuln_class":"race_condition"},"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\ntcp: Don't call skb_clone_and_charge_r() for close()d listener in tcp_v6_do_rcv().\n\ntcp_v6_do_rcv() no longer calls skb_clone_and_charge_r() for\nTCP_LISTEN since commit 073d89808c06 (\"net: fix data-races around\nsk-\u003esk_forward_alloc\").\n\nHowever, there is still a small race window between tcp_v6_rcv()\nand tcp_v6_do_rcv(), where concurrent close() changes TCP_LISTEN\nto TCP_CLOSE, causing skb_clone_and_charge_r() to be called\nlocklessly and resulting in the splat below. [0]\n\nLet's avoid calling skb_clone_and_charge_r() for TCP_CLOSE as well.\n\nThis is fine for non-listeners because tcp_rcv_state_process()\ndrops skb for TCP_CLOSE and opt_skb was freed immediately anyway.\n\n[0]:\nsk-\u003esk_forward_alloc\nWARNING: net/ipv4/af_inet.c:162 at inet_sock_destruct+0x64d/0x810 net/ipv4/af_inet.c:162, CPU#1: ksoftirqd/1/28\nModules linked in:\nCPU: 1 UID: 0 PID: 28 Comm: ksoftirqd/1 Not tainted 7.2.0 #17 PREEMPT(full)\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.17.0-debian-1.17.0-1 04/01/2014\nRIP: 0010:inet_sock_destruct+0x64d/0x810 net/ipv4/af_inet.c:162\nCode: 3d 49 ff e9 06 fd ff ff e8 d0 5b 83 f8 90 0f 0b 90 e9 35 fe ff ff e8 c2 5b 83 f8 90 0f 0b 90 e9 c5 fe ff ff e8 b4 5b 83 f8 90 \u003c0f\u003e 0b 90 e9 04 ff ff ff e8 a6 5b 83 f8 90 0f 0b 90 e9 65 fe ff ff\nRSP: 0018:ffffc90000677bb8 EFLAGS: 00010246\nRAX: 0000000000000000 RBX: ffff8880117bde80 RCX: ffffffff8957eb41\nRDX: ffff88801dad5d00 RSI: ffffffff8957ec3c RDI: 0000000000000005\nRBP: 00000000fffff000 R08: ffffffff8957eb41 R09: 00000000fffff000\nR10: 0000000000000005 R11: 0000000000000000 R12: dffffc0000000000\nR13: ffff8880117bdf10 R14: ffffffff81c08eb7 R15: 0000000000000003\nFS:  0000000000000000(0000) GS:ffff8880d7ae5000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f93a1021138 CR3: 00000000207a9000 CR4: 0000000000350ef0\nCall Trace:\n \u003cTASK\u003e\n __sk_destruct+0x82/0xae0 net/core/sock.c:2356\n rcu_do_batch kernel/rcu/tree.c:2645 [inline]\n rcu_core+0x59c/0x1100 kernel/rcu/tree.c:2897\n handle_softirqs+0x1e4/0x9b0 kernel/softirq.c:622\n run_ksoftirqd kernel/softirq.c:1076 [inline]\n run_ksoftirqd+0x38/0x60 kernel/softirq.c:1068\n smpboot_thread_fn+0x458/0xc80 kernel/smpboot.c:160\n kthread+0x396/0x4a0 kernel/kthread.c:436\n ret_from_fork+0x8e0/0xe40 arch/x86/kernel/process.c:158\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245\n \u003c/TASK\u003e","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":"tcp: Don't call skb_clone_and_charge_r() for close()d listener in tcp_v6_do_rcv().","id":"CVE-2026-98300","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"race_condition","year":"2026"},"n_packages":0,"n_references":8,"next":{"headline":"net: bridge: mst: move switchdev call outside rcu","id":"CVE-2026-98301"},"packages":[],"prev":{"headline":"tcp: do not let tcp_rmem be set below 4096","id":"CVE-2026-98299"},"products":["Linux"],"published":"2026-10-06","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 race condition in the Linux kernel TCP IPv6 receive path can cause a kernel warning and potential denial of service when a listener is closed concurrently.","url":"https://insights.sbomify.com/CVE-2026-98300/"}