CVE-2026-89780 (GCVE-0-2026-89780)
Vulnerability from cvelistv5 – Published: 2026-09-16 08:48 – Updated: 2026-09-16 08:48
VLAI
EPSS
VEX
Title
net: qualcomm: rmnet: restore skb->dev on deaggregated frames
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: qualcomm: rmnet: restore skb->dev on deaggregated frames
rmnet_map_deaggregate() allocates each sub-frame with alloc_skb() and
leaves skb->dev NULL. __rmnet_map_ingress_handler() assigns
skb->dev = ep->egress_dev only on the data path, but a MAP command frame
is dispatched to rmnet_map_command() before that, so rmnet_map_send_ack()
runs netif_tx_lock(skb->dev) on a NULL device. An unprivileged user
reaches this by unsharing a user+net namespace, creating an rmnet link
over a tap device with INGRESS_DEAGGREGATION and INGRESS_MAP_COMMANDS,
and writing an aggregated frame carrying a flow-control command to the
tap fd.
Restore the assignment dropped by 378e25357ac7, so every skb leaving
rmnet_map_deaggregate() has a valid device.
BUG: KASAN: null-ptr-deref in _raw_spin_lock (kernel/locking/spinlock.c:158)
Write of size 4 at addr 00000000000004b4 by task exploit/144
Call Trace:
_raw_spin_lock (kernel/locking/spinlock.c:158)
netif_tx_lock (net/sched/sch_generic.c:497)
rmnet_map_command (drivers/net/ethernet/qualcomm/rmnet/rmnet_map_command.c:67)
rmnet_rx_handler (drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c:125)
__netif_receive_skb_core.constprop.0 (net/core/dev.c:6103)
...
__netif_receive_skb_one_core (net/core/dev.c:6214)
netif_receive_skb (net/core/dev.c:6474)
tun_get_user (drivers/net/tun.c:1966)
tun_chr_write_iter (drivers/net/tun.c:2012)
vfs_write (fs/read_write.c:687)
ksys_write (fs/read_write.c:739)
do_syscall_64 (arch/x86/entry/syscall_64.c:94)
entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
Kernel panic - not syncing: Fatal exception in interrupt
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
378e25357ac78ad02fbc98bec9b4e3baaa916c5c , < 5aaa7409c1b4ca4c60d66e2afa99703bf4eb7ddd
(git)
Affected: 378e25357ac78ad02fbc98bec9b4e3baaa916c5c , < 9b78ab84ddf97c06a8567edb62b6c0fd582f9a62 (git) Affected: 378e25357ac78ad02fbc98bec9b4e3baaa916c5c , < 9d18c6c6cd1666b2cb7915cad052e22abf520997 (git) Affected: 378e25357ac78ad02fbc98bec9b4e3baaa916c5c , < 4bcef54e4a3355a62d9ad90729fe563435ec76c3 (git) Affected: 378e25357ac78ad02fbc98bec9b4e3baaa916c5c , < b14c22c31d9e30f38ea1693ac06d318f32258f5d (git) Affected: 378e25357ac78ad02fbc98bec9b4e3baaa916c5c , < 7abe769e72c792e5f9eb273813eb3ecd8389854c (git) Affected: 378e25357ac78ad02fbc98bec9b4e3baaa916c5c , < 200460a0793dc6af97d3b36d92ac245350ac26fc (git) Affected: 378e25357ac78ad02fbc98bec9b4e3baaa916c5c , < a66734a1c5e36525ea07e9f4547fddc51e916de3 (git) |
guessed | |
| Linux | Linux |
Affected:
4.17
Unaffected: 0 , < 4.17 (semver) Unaffected: 5.10.270 , ≤ 5.10.* (semver) Unaffected: 5.15.221 , ≤ 5.15.* (semver) Unaffected: 6.1.188 , ≤ 6.1.* (semver) Unaffected: 6.6.157 , ≤ 6.6.* (semver) Unaffected: 6.12.110 , ≤ 6.12.* (semver) Unaffected: 6.18.52 , ≤ 6.18.* (semver) Unaffected: 7.2.6 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c"
],
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"vendor": "Linux",
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{
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"status": "affected",
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"versionType": "git"
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{
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"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.17"
},
{
"lessThan": "4.17",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.2.*",
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.3-rc1",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.270",
"versionStartIncluding": "4.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.221",
"versionStartIncluding": "4.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.188",
"versionStartIncluding": "4.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.157",
"versionStartIncluding": "4.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.110",
"versionStartIncluding": "4.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.52",
"versionStartIncluding": "4.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2.6",
"versionStartIncluding": "4.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.3-rc1",
"versionStartIncluding": "4.17",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qualcomm: rmnet: restore skb-\u003edev on deaggregated frames\n\nrmnet_map_deaggregate() allocates each sub-frame with alloc_skb() and\nleaves skb-\u003edev NULL. __rmnet_map_ingress_handler() assigns\nskb-\u003edev = ep-\u003eegress_dev only on the data path, but a MAP command frame\nis dispatched to rmnet_map_command() before that, so rmnet_map_send_ack()\nruns netif_tx_lock(skb-\u003edev) on a NULL device. An unprivileged user\nreaches this by unsharing a user+net namespace, creating an rmnet link\nover a tap device with INGRESS_DEAGGREGATION and INGRESS_MAP_COMMANDS,\nand writing an aggregated frame carrying a flow-control command to the\ntap fd.\n\nRestore the assignment dropped by 378e25357ac7, so every skb leaving\nrmnet_map_deaggregate() has a valid device.\n\n BUG: KASAN: null-ptr-deref in _raw_spin_lock (kernel/locking/spinlock.c:158)\n Write of size 4 at addr 00000000000004b4 by task exploit/144\n Call Trace:\n _raw_spin_lock (kernel/locking/spinlock.c:158)\n netif_tx_lock (net/sched/sch_generic.c:497)\n rmnet_map_command (drivers/net/ethernet/qualcomm/rmnet/rmnet_map_command.c:67)\n rmnet_rx_handler (drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c:125)\n __netif_receive_skb_core.constprop.0 (net/core/dev.c:6103)\n ...\n __netif_receive_skb_one_core (net/core/dev.c:6214)\n netif_receive_skb (net/core/dev.c:6474)\n tun_get_user (drivers/net/tun.c:1966)\n tun_chr_write_iter (drivers/net/tun.c:2012)\n vfs_write (fs/read_write.c:687)\n ksys_write (fs/read_write.c:739)\n do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\n Kernel panic - not syncing: Fatal exception in interrupt"
}
],
"providerMetadata": {
"dateUpdated": "2026-09-16T08:48:19.760Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/5aaa7409c1b4ca4c60d66e2afa99703bf4eb7ddd"
},
{
"url": "https://git.kernel.org/stable/c/9b78ab84ddf97c06a8567edb62b6c0fd582f9a62"
},
{
"url": "https://git.kernel.org/stable/c/9d18c6c6cd1666b2cb7915cad052e22abf520997"
},
{
"url": "https://git.kernel.org/stable/c/4bcef54e4a3355a62d9ad90729fe563435ec76c3"
},
{
"url": "https://git.kernel.org/stable/c/b14c22c31d9e30f38ea1693ac06d318f32258f5d"
},
{
"url": "https://git.kernel.org/stable/c/7abe769e72c792e5f9eb273813eb3ecd8389854c"
},
{
"url": "https://git.kernel.org/stable/c/200460a0793dc6af97d3b36d92ac245350ac26fc"
},
{
"url": "https://git.kernel.org/stable/c/a66734a1c5e36525ea07e9f4547fddc51e916de3"
}
],
"title": "net: qualcomm: rmnet: restore skb-\u003edev on deaggregated frames",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-89780",
"datePublished": "2026-09-16T08:48:19.760Z",
"dateReserved": "2026-09-11T19:38:34.765Z",
"dateUpdated": "2026-09-16T08:48:19.760Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-89780",
"date": "2026-09-16",
"epss": "0.0021",
"percentile": "0.11448"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-89780\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-09-16T09:17:08.520\",\"lastModified\":\"2026-09-16T09:17:08.520\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: qualcomm: rmnet: restore skb-\u003edev on deaggregated frames\\n\\nrmnet_map_deaggregate() allocates each sub-frame with alloc_skb() and\\nleaves skb-\u003edev NULL. __rmnet_map_ingress_handler() assigns\\nskb-\u003edev = ep-\u003eegress_dev only on the data path, but a MAP command frame\\nis dispatched to rmnet_map_command() before that, so rmnet_map_send_ack()\\nruns netif_tx_lock(skb-\u003edev) on a NULL device. An unprivileged user\\nreaches this by unsharing a user+net namespace, creating an rmnet link\\nover a tap device with INGRESS_DEAGGREGATION and INGRESS_MAP_COMMANDS,\\nand writing an aggregated frame carrying a flow-control command to the\\ntap fd.\\n\\nRestore the assignment dropped by 378e25357ac7, so every skb leaving\\nrmnet_map_deaggregate() has a valid device.\\n\\n BUG: KASAN: null-ptr-deref in _raw_spin_lock (kernel/locking/spinlock.c:158)\\n Write of size 4 at addr 00000000000004b4 by task exploit/144\\n Call Trace:\\n _raw_spin_lock (kernel/locking/spinlock.c:158)\\n netif_tx_lock (net/sched/sch_generic.c:497)\\n rmnet_map_command (drivers/net/ethernet/qualcomm/rmnet/rmnet_map_command.c:67)\\n rmnet_rx_handler (drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c:125)\\n __netif_receive_skb_core.constprop.0 (net/core/dev.c:6103)\\n ...\\n __netif_receive_skb_one_core (net/core/dev.c:6214)\\n netif_receive_skb (net/core/dev.c:6474)\\n tun_get_user (drivers/net/tun.c:1966)\\n tun_chr_write_iter (drivers/net/tun.c:2012)\\n vfs_write (fs/read_write.c:687)\\n ksys_write (fs/read_write.c:739)\\n do_syscall_64 (arch/x86/entry/syscall_64.c:94)\\n entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\\n Kernel panic - not syncing: Fatal exception in interrupt\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"378e25357ac78ad02fbc98bec9b4e3baaa916c5c\",\"lessThan\":\"5aaa7409c1b4ca4c60d66e2afa99703bf4eb7ddd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"378e25357ac78ad02fbc98bec9b4e3baaa916c5c\",\"lessThan\":\"9b78ab84ddf97c06a8567edb62b6c0fd582f9a62\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"378e25357ac78ad02fbc98bec9b4e3baaa916c5c\",\"lessThan\":\"9d18c6c6cd1666b2cb7915cad052e22abf520997\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"378e25357ac78ad02fbc98bec9b4e3baaa916c5c\",\"lessThan\":\"4bcef54e4a3355a62d9ad90729fe563435ec76c3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"378e25357ac78ad02fbc98bec9b4e3baaa916c5c\",\"lessThan\":\"b14c22c31d9e30f38ea1693ac06d318f32258f5d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"378e25357ac78ad02fbc98bec9b4e3baaa916c5c\",\"lessThan\":\"7abe769e72c792e5f9eb273813eb3ecd8389854c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"378e25357ac78ad02fbc98bec9b4e3baaa916c5c\",\"lessThan\":\"200460a0793dc6af97d3b36d92ac245350ac26fc\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"378e25357ac78ad02fbc98bec9b4e3baaa916c5c\",\"lessThan\":\"a66734a1c5e36525ea07e9f4547fddc51e916de3\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.17\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.17\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.270\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.221\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.188\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.157\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.110\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.52\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.6\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/200460a0793dc6af97d3b36d92ac245350ac26fc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4bcef54e4a3355a62d9ad90729fe563435ec76c3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5aaa7409c1b4ca4c60d66e2afa99703bf4eb7ddd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7abe769e72c792e5f9eb273813eb3ecd8389854c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9b78ab84ddf97c06a8567edb62b6c0fd582f9a62\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9d18c6c6cd1666b2cb7915cad052e22abf520997\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a66734a1c5e36525ea07e9f4547fddc51e916de3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b14c22c31d9e30f38ea1693ac06d318f32258f5d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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