{ "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-2026-90071", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-90071", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-09-17T16:05:52.245Z", "updatedAt": "2026-10-19T08:57:28.331Z", "importedAt": "2026-10-24T01:58:35.090Z", "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: sch_teql: restore skb->dev on the slave failure path", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: sch_teql: restore skb->dev on the slave failure path\n\nteql_master_xmit() sets skb->dev = slave before calling the slave's\nndo_start_xmit(), but never restores it when that transmit fails. The\nskb then walks on to the next slave still pointing at the previous one.\n\nIf a later slave has no resolved neighbour, teql_resolve() hands the skb\nto neigh_event_send(), which queues it on that neighbour's arp_queue\nwith the stale skb->dev. skb->dev holds no reference, so deleting the\nprevious slave frees the net_device while the skb is still queued.\nWhatever runs next on that skb - arp_error_report() on timeout, or\nneigh_direct_output() -> dev_queue_xmit() once the neighbour resolves -\ncauses a UAF like the one below:\n\nBUG: KASAN: slab-use-after-free in __icmp_send (net/ipv4/icmp.c:914 (discriminator 2))\nRead of size 4 at addr ffff888106e100b0 by task flood_packet/527\nCPU: 0 UID: 0 PID: 527 Comm: flood_packet Not tainted 7.2.0-rc6-g594d90519502 #1 PREEMPT(lazy)\nHardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\nCall Trace:\n\ndump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)\nprint_report (mm/kasan/report.c:378 mm/kasan/report.c:482)\n? __pfx__raw_spin_lock_irqsave (./include/asm-generic/qrwlock.h:122 (discriminator 4))\n? __icmp_send (net/ipv4/icmp.c:914 (discriminator 2))\nkasan_report (mm/kasan/report.c:595)\n? __icmp_send (net/ipv4/icmp.c:914 (discriminator 2))\n__icmp_send (net/ipv4/icmp.c:914 (discriminator 2))\n[...]\nipv4_link_failure (net/ipv4/route.c:1251 net/ipv4/route.c:1258)\n? __pfx_ipv4_link_failure (./include/linux/skbuff.h:4327)\n? _raw_write_lock (./include/linux/instrumented.h:55 ./include/linux/atomic/atomic-instrumented.h:1301 ./include/asm-generic/qrwlock.h:98 ./include/linux/rwlock_api_smp.h:230 kernel/locking/spinlock.c:304)\n? __pfx__raw_write_lock (kernel/locking/spinlock.c:175)\narp_error_report (./include/net/dst.h:438 net/ipv4/arp.c:296)\nneigh_invalidate (net/core/neighbour.c:1077)\nneigh_timer_handler (net/core/neighbour.c:1169)\n[...]\nAllocated by task 505:\nkasan_save_stack (mm/kasan/common.c:57)\nkasan_save_track (mm/kasan/common.c:78)\n__kasan_kmalloc (mm/kasan/common.c:398 mm/kasan/common.c:415)\n__kvmalloc_node_noprof (./include/linux/kasan.h:263 mm/slub.c:5334 mm/slub.c:6905)\nalloc_netdev_mqs (net/core/dev.c:12055 (discriminator 2))\nrtnl_create_link (net/core/rtnetlink.c:3721)\nrtnl_newlink (net/core/rtnetlink.c:3903 net/core/rtnetlink.c:4044 net/core/rtnetlink.c:4159)\nrtnetlink_rcv_msg (net/core/rtnetlink.c:7076)\n[...]\nFreed by task 536:\nkasan_save_stack (mm/kasan/common.c:57)\nkasan_save_track (mm/kasan/common.c:78)\nkasan_save_free_info (mm/kasan/generic.c:584)\n__kasan_slab_free (mm/kasan/common.c:253 mm/kasan/common.c:285)\nkfree (./include/linux/kasan.h:235 mm/slub.c:2677 mm/slub.c:6377 mm/slub.c:6692)\ndevice_release (drivers/base/core.c:2636)\nkobject_put (lib/kobject.c:689 lib/kobject.c:720 ./include/linux/kref.h:65 lib/kobject.c:737)\nnetdev_run_todo (net/core/dev.c:11756)\nrtnl_dellink (net/core/rtnetlink.c:157 ./include/linux/rtnetlink.h:135 net/core/rtnetlink.c:3651)\nrtnetlink_rcv_msg (net/core/rtnetlink.c:7076)\n[...]\n\nFix this by restoring skb->dev to the master at the end of each slave's\niteration.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "383493b9940e3d1b5517424081b3e072e20ec43c", "status": "affected", "versionType": "git", "lessThan": "1360bc93f5be1be3cf937ebea667b3418dd30a79" }, { "version": "6b1f563d670162e188a0f2aec39c24b67b106e17", "status": "affected", "versionType": "git", "lessThan": "d453bf439ef230b5743afc25e194adacca8c6e43" }, { "version": "57c153249143333bbf4ecf927bdf8aa2696ee397", "status": "affected", "versionType": "git", "lessThan": "012559cf3c67ce8825a31d4f66b040b6fbaf775e" }, { "version": "59b06d8b9bdb6b64b3c534c18da68bce5ccd31be", "status": "affected", "versionType": "git", "lessThan": "aa39a790d56b40bfcf3861653ceb46a3a113adb6" }, { "version": "81a43e8005366f16e629d8c95dfe05beaa8d36a7", "status": "affected", "versionType": "git", "lessThan": "00d8a387b23b7831ad9919256a6b9caaa10f19c3" }, { "version": "0bad9c86edd22dec4df83c2b29872d66fd8a2ff4", "status": "affected", "versionType": "git", "lessThan": "96bc345a3f17543d0d92ada609e02198d6380e26" }, { "version": "0cc0c2e661af418bbf7074179ea5cfffc0a5c466", "status": "affected", "versionType": "git", "lessThan": "0cd75037948567193f7f5767176538822ce23873" }, { "version": "0cc0c2e661af418bbf7074179ea5cfffc0a5c466", "status": "affected", "versionType": "git", "lessThan": "dc4b95b8fee95113587e93ca116356032d271371" }, { "version": "21ea283c2750c8307aa35ee832b0951cc993c27d", "status": "affected", "versionType": "git" }, { "version": "5.10.253", "status": "affected", "versionType": "semver", "lessThan": "5.10.270" }, { "version": "5.15.203", "status": "affected", "versionType": "semver", "lessThan": "5.15.221" }, { "version": "6.1.167", "status": "affected", "versionType": "semver", "lessThan": "6.1.188" }, { "version": "6.6.130", "status": "affected", "versionType": "semver", "lessThan": "6.6.157" }, { "version": "6.12.78", "status": "affected", "versionType": "semver", "lessThan": "6.12.110" }, { "version": "6.18.19", "status": "affected", "versionType": "semver", "lessThan": "6.18.52" }, { "version": "6.19.9", "status": "affected", "versionType": "semver", "lessThan": "6.20" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "7.0", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "7.0" }, { "version": "5.10.270", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.221", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.188", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.157", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.110", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.52", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.2.6", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.2.*" }, { "version": "7.3", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }