{ "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-2025-21653", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-21653", "idYear": 2025, "status": "PUBLISHED", "publishedAt": "2025-01-19T10:18:10.354Z", "updatedAt": "2026-10-15T01:02:49.719Z", "importedAt": "2026-10-24T01:57:29.455Z", "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": "net_sched: cls_flow: validate TCA_FLOW_RSHIFT attribute", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet_sched: cls_flow: validate TCA_FLOW_RSHIFT attribute\n\nsyzbot found that TCA_FLOW_RSHIFT attribute was not validated.\nRight shitfing a 32bit integer is undefined for large shift values.\n\nUBSAN: shift-out-of-bounds in net/sched/cls_flow.c:329:23\nshift exponent 9445 is too large for 32-bit type 'u32' (aka 'unsigned int')\nCPU: 1 UID: 0 PID: 54 Comm: kworker/u8:3 Not tainted 6.13.0-rc3-syzkaller-00180-g4f619d518db9 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024\nWorkqueue: ipv6_addrconf addrconf_dad_work\nCall Trace:\n \n __dump_stack lib/dump_stack.c:94 [inline]\n dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120\n ubsan_epilogue lib/ubsan.c:231 [inline]\n __ubsan_handle_shift_out_of_bounds+0x3c8/0x420 lib/ubsan.c:468\n flow_classify+0x24d5/0x25b0 net/sched/cls_flow.c:329\n tc_classify include/net/tc_wrapper.h:197 [inline]\n __tcf_classify net/sched/cls_api.c:1771 [inline]\n tcf_classify+0x420/0x1160 net/sched/cls_api.c:1867\n sfb_classify net/sched/sch_sfb.c:260 [inline]\n sfb_enqueue+0x3ad/0x18b0 net/sched/sch_sfb.c:318\n dev_qdisc_enqueue+0x4b/0x290 net/core/dev.c:3793\n __dev_xmit_skb net/core/dev.c:3889 [inline]\n __dev_queue_xmit+0xf0e/0x3f50 net/core/dev.c:4400\n dev_queue_xmit include/linux/netdevice.h:3168 [inline]\n neigh_hh_output include/net/neighbour.h:523 [inline]\n neigh_output include/net/neighbour.h:537 [inline]\n ip_finish_output2+0xd41/0x1390 net/ipv4/ip_output.c:236\n iptunnel_xmit+0x55d/0x9b0 net/ipv4/ip_tunnel_core.c:82\n udp_tunnel_xmit_skb+0x262/0x3b0 net/ipv4/udp_tunnel_core.c:173\n geneve_xmit_skb drivers/net/geneve.c:916 [inline]\n geneve_xmit+0x21dc/0x2d00 drivers/net/geneve.c:1039\n __netdev_start_xmit include/linux/netdevice.h:5002 [inline]\n netdev_start_xmit include/linux/netdevice.h:5011 [inline]\n xmit_one net/core/dev.c:3590 [inline]\n dev_hard_start_xmit+0x27a/0x7d0 net/core/dev.c:3606\n __dev_queue_xmit+0x1b73/0x3f50 net/core/dev.c:4434", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "e5dfb815181fcb186d6080ac3a091eadff2d98fe", "status": "affected", "versionType": "git", "lessThan": "9858f4afeb2e59506e714176bd3e135539a3eeec" }, { "version": "e5dfb815181fcb186d6080ac3a091eadff2d98fe", "status": "affected", "versionType": "git", "lessThan": "43658e4a5f2770ad94e93362885ff51c10cf3179" }, { "version": "e5dfb815181fcb186d6080ac3a091eadff2d98fe", "status": "affected", "versionType": "git", "lessThan": "a313d6e6d5f3a631cae5a241c392c28868aa5c5e" }, { "version": "e5dfb815181fcb186d6080ac3a091eadff2d98fe", "status": "affected", "versionType": "git", "lessThan": "2011749ca96460386844dfc7e0fde53ebee96f3c" }, { "version": "e5dfb815181fcb186d6080ac3a091eadff2d98fe", "status": "affected", "versionType": "git", "lessThan": "e54beb9aed2a90dddf4c5d68fcfc9a01f3e40a61" }, { "version": "e5dfb815181fcb186d6080ac3a091eadff2d98fe", "status": "affected", "versionType": "git", "lessThan": "6fde663f7321418996645ee602a473457640542f" }, { "version": "e5dfb815181fcb186d6080ac3a091eadff2d98fe", "status": "affected", "versionType": "git", "lessThan": "a039e54397c6a75b713b9ce7894a62e06956aa92" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "2.6.25", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "2.6.25" }, { "version": "5.4.290", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.234", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.177", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.125", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.72", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.10", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.13", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }