net/sched: sch_teql: restore skb->dev on the slave failure path
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: 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 (d
CVE-2026-90071
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-90071
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "383493b9940e3d1b5517424081b3e072e20ec43c",
"lessThan": "1360bc93f5be1be3cf937ebea667b3418dd30a79",
"versionType": "git"
},
{
"status": "affected",
"version": "6b1f563d670162e188a0f2aec39c24b67b106e17",
"lessThan": "d453bf439ef230b5743afc25e194adacca8c6e43",
"versionType": "git"
},
{
"status": "affected",
"version": "57c153249143333bbf4ecf927bdf8aa2696ee397",
"lessThan": "012559cf3c67ce8825a31d4f66b040b6fbaf775e",
"versionType": "git"
},
{
"status": "affected",
"version": "59b06d8b9bdb6b64b3c534c18da68bce5ccd31be",
"lessThan": "aa39a790d56b40bfcf3861653ceb46a3a113adb6",
"versionType": "git"
},
{
"status": "affected",
"version": "81a43e8005366f16e629d8c95dfe05beaa8d36a7",
"lessThan": "00d8a387b23b7831ad9919256a6b9caaa10f19c3",
"versionType": "git"
},
{
"status": "affected",
"version": "0bad9c86edd22dec4df83c2b29872d66fd8a2ff4",
"lessThan": "96bc345a3f17543d0d92ada609e02198d6380e26",
"versionType": "git"
},
{
"status": "affected",
"version": "0cc0c2e661af418bbf7074179ea5cfffc0a5c466",
"lessThan": "0cd75037948567193f7f5767176538822ce23873",
"versionType": "git"
},
{
"status": "affected",
"version": "0cc0c2e661af418bbf7074179ea5cfffc0a5c466",
"lessThan": "dc4b95b8fee95113587e93ca116356032d271371",
"versionType": "git"
},
{
"status": "affected",
"version": "21ea283c2750c8307aa35ee832b0951cc993c27d",
"versionType": "git"
},
{
"status": "affected",
"version": "5.10.253",
"lessThan": "5.10.270",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.203",
"lessThan": "5.15.221",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.1.167",
"lessThan": "6.1.188",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.6.130",
"lessThan": "6.6.157",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.12.78",
"lessThan": "6.12.110",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.18.19",
"lessThan": "6.18.52",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.19.9",
"lessThan": "6.20",
"versionType": "semver"
}
],
"programFiles": [
"net/sched/sch_teql.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "7.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/sched/sch_teql.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90071
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #36488 · Revision 1
- Added to Heist Feed
- Publisher date