{"id":"CVE-2026-98300","state":"PUBLISHED","title":"tcp: Don't call skb_clone_and_charge_r() for close()d listener in tcp_v6_do_rcv().","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->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 <TASK>\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 </TASK>","publishedAt":"2026-10-06T08:45:58.091Z","updatedAt":"2026-10-19T09:17:11.164Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e994b2f0fb9229aeff5eea9541320bd7b2ca8714","status":"affected","lessThan":"a23a3bc5004df6434de05797e0b6b2ecf864b86a","versionType":"git"},{"version":"e994b2f0fb9229aeff5eea9541320bd7b2ca8714","status":"affected","lessThan":"1cb7f292a337fdc72a8219bcd9d40a9cf5e86db5","versionType":"git"},{"version":"e994b2f0fb9229aeff5eea9541320bd7b2ca8714","status":"affected","lessThan":"7d94602e77a4525611afebb23149145ac242afd7","versionType":"git"},{"version":"e994b2f0fb9229aeff5eea9541320bd7b2ca8714","status":"affected","lessThan":"b727e3d58cb906f1506c1334dfba71fbb1338339","versionType":"git"},{"version":"e994b2f0fb9229aeff5eea9541320bd7b2ca8714","status":"affected","lessThan":"3e3394a13b603cc79b6a35480b8e20df6c716944","versionType":"git"},{"version":"e994b2f0fb9229aeff5eea9541320bd7b2ca8714","status":"affected","lessThan":"619bfbaacbff6a9822923f69f6af29d7f66a870c","versionType":"git"},{"version":"e994b2f0fb9229aeff5eea9541320bd7b2ca8714","status":"affected","lessThan":"56d38839ef0bff6526d9bd73b6811bd00316b21c","versionType":"git"},{"version":"e994b2f0fb9229aeff5eea9541320bd7b2ca8714","status":"affected","lessThan":"8e759cd1f6444a946bd1fd2b2b29eea582eea1d5","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/tcp_ipv6.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.4","versionType":"semver"},{"version":"5.10.271","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/tcp_ipv6.c"]}],"references":["https://git.kernel.org/stable/c/a23a3bc5004df6434de05797e0b6b2ecf864b86a","https://git.kernel.org/stable/c/1cb7f292a337fdc72a8219bcd9d40a9cf5e86db5","https://git.kernel.org/stable/c/7d94602e77a4525611afebb23149145ac242afd7","https://git.kernel.org/stable/c/b727e3d58cb906f1506c1334dfba71fbb1338339","https://git.kernel.org/stable/c/3e3394a13b603cc79b6a35480b8e20df6c716944","https://git.kernel.org/stable/c/619bfbaacbff6a9822923f69f6af29d7f66a870c","https://git.kernel.org/stable/c/56d38839ef0bff6526d9bd73b6811bd00316b21c","https://git.kernel.org/stable/c/8e759cd1f6444a946bd1fd2b2b29eea582eea1d5"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98300.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98300","state":"PUBLISHED","datePublished":"2026-10-06T08:45:58.091Z","dateUpdated":"2026-10-19T09:17:11.164Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.337Z"},"containers":{"cna":{"title":"tcp: Don't call skb_clone_and_charge_r() for close()d listener in tcp_v6_do_rcv().","descriptions":[{"lang":"en","value":"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 <TASK>\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 </TASK>"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e994b2f0fb9229aeff5eea9541320bd7b2ca8714","status":"affected","lessThan":"a23a3bc5004df6434de05797e0b6b2ecf864b86a","versionType":"git"},{"version":"e994b2f0fb9229aeff5eea9541320bd7b2ca8714","status":"affected","lessThan":"1cb7f292a337fdc72a8219bcd9d40a9cf5e86db5","versionType":"git"},{"version":"e994b2f0fb9229aeff5eea9541320bd7b2ca8714","status":"affected","lessThan":"7d94602e77a4525611afebb23149145ac242afd7","versionType":"git"},{"version":"e994b2f0fb9229aeff5eea9541320bd7b2ca8714","status":"affected","lessThan":"b727e3d58cb906f1506c1334dfba71fbb1338339","versionType":"git"},{"version":"e994b2f0fb9229aeff5eea9541320bd7b2ca8714","status":"affected","lessThan":"3e3394a13b603cc79b6a35480b8e20df6c716944","versionType":"git"},{"version":"e994b2f0fb9229aeff5eea9541320bd7b2ca8714","status":"affected","lessThan":"619bfbaacbff6a9822923f69f6af29d7f66a870c","versionType":"git"},{"version":"e994b2f0fb9229aeff5eea9541320bd7b2ca8714","status":"affected","lessThan":"56d38839ef0bff6526d9bd73b6811bd00316b21c","versionType":"git"},{"version":"e994b2f0fb9229aeff5eea9541320bd7b2ca8714","status":"affected","lessThan":"8e759cd1f6444a946bd1fd2b2b29eea582eea1d5","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/tcp_ipv6.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.4","versionType":"semver"},{"version":"5.10.271","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/tcp_ipv6.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/a23a3bc5004df6434de05797e0b6b2ecf864b86a"},{"url":"https://git.kernel.org/stable/c/1cb7f292a337fdc72a8219bcd9d40a9cf5e86db5"},{"url":"https://git.kernel.org/stable/c/7d94602e77a4525611afebb23149145ac242afd7"},{"url":"https://git.kernel.org/stable/c/b727e3d58cb906f1506c1334dfba71fbb1338339"},{"url":"https://git.kernel.org/stable/c/3e3394a13b603cc79b6a35480b8e20df6c716944"},{"url":"https://git.kernel.org/stable/c/619bfbaacbff6a9822923f69f6af29d7f66a870c"},{"url":"https://git.kernel.org/stable/c/56d38839ef0bff6526d9bd73b6811bd00316b21c"},{"url":"https://git.kernel.org/stable/c/8e759cd1f6444a946bd1fd2b2b29eea582eea1d5"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:17:11.164Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"5.10.271"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"5.15.222"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"6.1.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"6.18.54"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"7.2.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}