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vuln-cve/data/2026/97xxx/CVE-2026-97958.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-97958",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-09-25T10:18:58.205Z",
"datePublished": "2026-09-25T10:23:03.753Z",
"dateUpdated": "2026-10-19T09:11:24.306Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-10-19T09:11:24.306Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: cls_api: Don't replay RTM_GETCHAIN in tc_ctl_chain().\n\nIf a netlink socket sends RTM_GETCHAIN requests repeatedly\nwithout recv()ing the responses, tc_ctl_chain() hogs CPU and\ntriggers Hung Task splat. [0]\n\nAs caught in the stack trace, netlink_attachskb() could confuse\ntc_ctl_chain() by returning -EAGAIN when the userspace netlink\nsocket's receive buffer is full.\n\nThe replay: label exists since commit 32a4f5ecd738 (\"net: sched:\nintroduce chain object to uapi\") but was not used initially.\n\nSince commit 9f407f1768d3 (\"net: sched: introduce chain templates\"),\nthe label is needed for RTM_NEWCHAIN because tcf_proto_lookup_ops()\nmay release RTNL to call request_module().\n\nHowever, the replay logic is unnecessary for RTM_GETCHAIN.\n\nLet's apply the replay logic only for RTM_NEWCHAIN.\n\n[0]:\nINFO: task repro:1018 is blocked on a mutex likely owned by task repro:1022.\ntask:repro state:R running task stack:14096 pid:1022 tgid:1014 ppid:961 task_flags:0x400040 flags:0x00080000\nCall Trace:\n <TASK>\n ? clockevents_program_event (kernel/time/clockevents.c:372)\n ? pskb_expand_head (net/core/skbuff.c:615)\n ? skb_release_data (net/core/skbuff.c:1122)\n ? netlink_attachskb (./include/linux/skbuff.h:1323 ./include/linux/skbuff.h:1332 net/netlink/af_netlink.c:1232)\n ? __netlink_lookup (./include/linux/rcupdate.h:882 ./include/linux/rhashtable.h:711 net/netlink/af_netlink.c:499)\n ? tc_chain_notify (net/sched/cls_api.c:3045)\n ? tc_chain_notify (./include/linux/skbuff.h:1384 net/sched/cls_api.c:3041)\n ? netlink_unicast (net/netlink/af_netlink.c:1335)\n ? rtnl_unicast (./include/net/netlink.h:1198 net/core/rtnetlink.c:985)\n ? tc_ctl_chain (net/sched/cls_api.c:3242)\n ? rtnetlink_rcv_msg (net/core/rtnetlink.c:7146)\n ? netlink_unicast (net/netlink/af_netlink.c:1354)\n ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:7177)\n ? netlink_rcv_skb (net/netlink/af_netlink.c:2556)\n ? netlink_unicast (net/netlink/af_netlink.c:1319)\n ? netlink_sendmsg (net/netlink/af_netlink.c:1900)\n ? __sock_sendmsg (net/socket.c:800)\n ? __sys_sendto (net/socket.c:2281)\n ? __x64_sys_sendto (net/socket.c:2288 net/socket.c:2284 net/socket.c:2284)\n ? do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)\n ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\n </TASK>"
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/sched/cls_api.c"
],
"versions": [
{
"version": "2ed9db3074fcd8d12709fe40ff0e691d74229818",
"lessThan": "240251a4ca7cda213103694b6e21c4a5745e5d8b",
"status": "affected",
"versionType": "git"
},
{
"version": "2ed9db3074fcd8d12709fe40ff0e691d74229818",
"lessThan": "9a0f07f7dbd1bfe8c2fd03ad055e9e60a703d5df",
"status": "affected",
"versionType": "git"
},
{
"version": "2ed9db3074fcd8d12709fe40ff0e691d74229818",
"lessThan": "6558b0d46c5941ed1aa67da8878e224c54239cc5",
"status": "affected",
"versionType": "git"
},
{
"version": "2ed9db3074fcd8d12709fe40ff0e691d74229818",
"lessThan": "96c2fc5daf983af2e0c1256c31e89c1f3f855279",
"status": "affected",
"versionType": "git"
},
{
"version": "2ed9db3074fcd8d12709fe40ff0e691d74229818",
"lessThan": "a1c2840d95af1fa3d83ba71e23fa0c674a4c6796",
"status": "affected",
"versionType": "git"
},
{
"version": "2ed9db3074fcd8d12709fe40ff0e691d74229818",
"lessThan": "503ba58481e3ba69d28127d35a39cec529f9670c",
"status": "affected",
"versionType": "git"
},
{
"version": "2ed9db3074fcd8d12709fe40ff0e691d74229818",
"lessThan": "e9ac395bb56122a057d0aa91a6b55d9e3fa37c26",
"status": "affected",
"versionType": "git"
},
{
"version": "2ed9db3074fcd8d12709fe40ff0e691d74229818",
"lessThan": "dff39930ad5e53d202bfdfb14687d1d2fd753b4d",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/sched/cls_api.c"
],
"versions": [
{
"version": "4.19",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.19",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.271",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.222",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.189",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.158",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.111",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.18.53",
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.2.7",
"lessThanOrEqual": "7.2.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.3",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.19",
"versionEndExcluding": "5.10.271"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.19",
"versionEndExcluding": "5.15.222"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.19",
"versionEndExcluding": "6.1.189"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.19",
"versionEndExcluding": "6.6.158"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.19",
"versionEndExcluding": "6.12.111"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.19",
"versionEndExcluding": "6.18.53"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.19",
"versionEndExcluding": "7.2.7"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.19",
"versionEndExcluding": "7.3"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/240251a4ca7cda213103694b6e21c4a5745e5d8b"
},
{
"url": "https://git.kernel.org/stable/c/9a0f07f7dbd1bfe8c2fd03ad055e9e60a703d5df"
},
{
"url": "https://git.kernel.org/stable/c/6558b0d46c5941ed1aa67da8878e224c54239cc5"
},
{
"url": "https://git.kernel.org/stable/c/96c2fc5daf983af2e0c1256c31e89c1f3f855279"
},
{
"url": "https://git.kernel.org/stable/c/a1c2840d95af1fa3d83ba71e23fa0c674a4c6796"
},
{
"url": "https://git.kernel.org/stable/c/503ba58481e3ba69d28127d35a39cec529f9670c"
},
{
"url": "https://git.kernel.org/stable/c/e9ac395bb56122a057d0aa91a6b55d9e3fa37c26"
},
{
"url": "https://git.kernel.org/stable/c/dff39930ad5e53d202bfdfb14687d1d2fd753b4d"
}
],
"title": "net/sched: cls_api: Don't replay RTM_GETCHAIN in tc_ctl_chain().",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
}
}
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