Answer in brief
CVE-2026-90071 records a High severity (CVSS 7.8) vulnerability in net/sched: sch_teql: restore skb->dev on the slave failure path. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=383493b9940e3d1b5517424081b3e072e20ec43c <1360bc93f5be1be3cf937ebea667b3418dd30a79 || >=6b1f563d670162e188a0f2aec39c24b67b106e17 <d453bf439ef230b5743afc25e194adacca8c6e43 || >=57c153249143333bbf4ecf927bdf8aa2696ee397 <012559cf3c67ce8825a31d4f66b040b6fbaf775e || >=59b06d8b9bdb6b64b3c534c18da68bce5ccd31be <aa39a790d56b40bfcf3861653ceb46a3a113adb6 || >=81a43e8005366f16e629d8c95dfe05beaa8d36a7 <00d8a387b23b7831ad9919256a6b9caaa10f19c3 || >=0bad9c86edd22dec4df83c2b29872d66fd8a2ff4 <96bc345a3f17543d0d92ada609e02198d6380e26 || >=0cc0c2e661af418bbf7074179ea5cfffc0a5c466 <0cd75037948567193f7f5767176538822ce23873 || >=0cc0c2e661af418bbf7074179ea5cfffc0a5c466 <dc4b95b8fee95113587e93ca116356032d271371 || 21ea283c2750c8307aa35ee832b0951cc993c27d || >=5.10.253 <5.10.270 || >=5.15.203 <5.15.221 || >=6.1.167 <6.1.188 || >=6.6.130 <6.6.157 || >=6.12.78 <6.12.110 || >=6.18.19 <6.18.52 || >=6.19.9 <6.20 | 1360bc93f5be1be3cf937ebea667b3418dd30a79, d453bf439ef230b5743afc25e194adacca8c6e43, 012559cf3c67ce8825a31d4f66b040b6fbaf775e, aa39a790d56b40bfcf3861653ceb46a3a113adb6, 00d8a387b23b7831ad9919256a6b9caaa10f19c3, 96bc345a3f17543d0d92ada609e02198d6380e26, 0cd75037948567193f7f5767176538822ce23873, dc4b95b8fee95113587e93ca116356032d271371, 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.52, 6.20 |
| Linux/Linuxgeneric | 7.0 | Not reported |
Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 17, 2026
In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_teql: restore skb->dev on the slave failure path teql_master_xmit() sets skb->dev = slave before calling the slave's ndo_start_xmit(), but never restores it when that transmit fails. The skb then walks on to the next slave still pointing at the previous one. If a later slave has no resolved neighbour, teql_resolve() hands the skb to neigh_event_send(), which queues it on that neighbour's arp_queue with the stale skb->dev. skb->dev holds no reference, so deleting the previous slave frees the net_device while the skb is still queued. Whatever runs next on that skb - arp_error_report() on timeout, or neigh_direct_output() -> dev_queue_xmit() once the neighbour resolves - causes a UAF like the one below: BUG: KASAN: slab-use-after-free in __icmp_send (net/ipv4/icmp.c:914 (discriminator 2)) Read of size 4 at addr ffff888106e100b0 by task flood_packet/527 CPU: 0 UID: 0 PID: 527 Comm: flood_packet Not tainted 7.2.0-rc6-g594d90519502 #1 PREEMPT(lazy) Hardware 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 Call Trace: <IRQ> dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120) print_report (mm/kasan/report.c:378 mm/kasan/report.c:482) ? __pfx__raw_spin_lock_irqsave (./include/asm-generic/qrwlock.h:122 (discriminator 4)) ? __icmp_send (net/ipv4/icmp.c:914 (discriminator 2)) kasan_report (mm/kasan/report.c:595) ? __icmp_send (net/ipv4/icmp.c:914 (discriminator 2)) __icmp_send (net/ipv4/icmp.c:914 (discriminator 2)) [...] ipv4_link_failure (net/ipv4/route.c:1251 net/ipv4/route.c:1258) ? __pfx_ipv4_link_failure (./include/linux/skbuff.h:4327) ? _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) ? __pfx__raw_write_lock (kernel/locking/spinlock.c:175) arp_error_report (./include/net/dst.h:438 net/ipv4/arp.c:296) neigh_invalidate (net/core/neighbour.c:1077) neigh_timer_handler (net/core/neighbour.c:1169) [...] Allocated by task 505: kasan_save_stack (mm/kasan/common.c:57) kasan_save_track (mm/kasan/common.c:78) __kasan_kmalloc (mm/kasan/common.c:398 mm/kasan/common.c:415) __kvmalloc_node_noprof (./include/linux/kasan.h:263 mm/slub.c:5334 mm/slub.c:6905) alloc_netdev_mqs (net/core/dev.c:12055 (discriminator 2)) rtnl_create_link (net/core/rtnetlink.c:3721) rtnl_newlink (net/core/rtnetlink.c:3903 net/core/rtnetlink.c:4044 net/core/rtnetlink.c:4159) rtnetlink_rcv_msg (net/core/rtnetlink.c:7076) [...] Freed by task 536: kasan_save_stack (mm/kasan/common.c:57) kasan_save_track (mm/kasan/common.c:78) kasan_save_free_info (mm/kasan/generic.c:584) __kasan_slab_free (mm/kasan/common.c:253 mm/kasan/common.c:285) kfree (./include/linux/kasan.h:235 mm/slub.c:2677 mm/slub.c:6377 mm/slub.c:6692) device_release (drivers/base/core.c:2636) kobject_put (lib/kobject.c:689 lib/kobject.c:720 ./include/linux/kref.h:65 lib/kobject.c:737) netdev_run_todo (net/core/dev.c:11756) rtnl_dellink (net/core/rtnetlink.c:157 ./include/linux/rtnetlink.h:135 net/core/rtnetlink.c:3651) rtnetlink_rcv_msg (net/core/rtnetlink.c:7076) [...] Fix this by restoring skb->dev to the master at the end of each slave's iteration.
Quoted source text, attributed separately from HOL analysis.