{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-98300", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-98300", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-10-06T08:45:58.091Z", "updatedAt": "2026-10-19T09:17:11.164Z", "importedAt": "2026-10-24T01:58:41.756Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "tcp: Don't call skb_clone_and_charge_r() for close()d listener in tcp_v6_do_rcv().", "summary": "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->sk_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->sk_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 <0f> 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 \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 ", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "e994b2f0fb9229aeff5eea9541320bd7b2ca8714", "status": "affected", "versionType": "git", "lessThan": "a23a3bc5004df6434de05797e0b6b2ecf864b86a" }, { "version": "e994b2f0fb9229aeff5eea9541320bd7b2ca8714", "status": "affected", "versionType": "git", "lessThan": "1cb7f292a337fdc72a8219bcd9d40a9cf5e86db5" }, { "version": "e994b2f0fb9229aeff5eea9541320bd7b2ca8714", "status": "affected", "versionType": "git", "lessThan": "7d94602e77a4525611afebb23149145ac242afd7" }, { "version": "e994b2f0fb9229aeff5eea9541320bd7b2ca8714", "status": "affected", "versionType": "git", "lessThan": "b727e3d58cb906f1506c1334dfba71fbb1338339" }, { "version": "e994b2f0fb9229aeff5eea9541320bd7b2ca8714", "status": "affected", "versionType": "git", "lessThan": "3e3394a13b603cc79b6a35480b8e20df6c716944" }, { "version": "e994b2f0fb9229aeff5eea9541320bd7b2ca8714", "status": "affected", "versionType": "git", "lessThan": "619bfbaacbff6a9822923f69f6af29d7f66a870c" }, { "version": "e994b2f0fb9229aeff5eea9541320bd7b2ca8714", "status": "affected", "versionType": "git", "lessThan": "56d38839ef0bff6526d9bd73b6811bd00316b21c" }, { "version": "e994b2f0fb9229aeff5eea9541320bd7b2ca8714", "status": "affected", "versionType": "git", "lessThan": "8e759cd1f6444a946bd1fd2b2b29eea582eea1d5" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "4.4", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "4.4" }, { "version": "5.10.271", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.222", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.189", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.158", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.112", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.54", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.2.8", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.2.*" }, { "version": "7.3", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }