CVE-2026-80795 (GCVE-0-2026-80795)
Vulnerability from cvelistv5
Published
2026-09-04 15:13
Modified
2026-09-04 15:13
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
nfc: nci: fix out-of-bounds write in nci_target_auto_activated()
nci_target_auto_activated() appends a target to the fixed-size array
ndev->targets[NCI_MAX_DISCOVERED_TARGETS] and increments ndev->n_targets
without first checking the array is full; unlike its sibling
nci_add_new_target(), which bails out when n_targets already equals
NCI_MAX_DISCOVERED_TARGETS.
ndev->n_targets is only cleared by nci_clear_target_list(), so an NFCC
that repeatedly re-runs discovery (RF_DISCOVER_RSP, which re-enters
NCI_DISCOVERY without clearing the target list) and reports an
auto-activated target (RF_INTF_ACTIVATED_NTF) drives n_targets past the
limit. The append then writes a struct nfc_target past the end of the
array (a slab out-of-bounds write), and nfc_targets_found() goes on to
walk the array with the inflated count:
BUG: KASAN: slab-out-of-bounds in nci_add_new_protocol+0x94/0x2ac [nci]
Write of size 2 at addr ffff0000c7299a18 by task kworker/u8:0/12
Workqueue: nfc0_nci_rx_wq nci_rx_work [nci]
Call trace:
nci_add_new_protocol+0x94/0x2ac [nci]
nci_ntf_packet+0xddc/0x11a0 [nci]
nci_rx_work+0x15c/0x1e0 [nci]
process_one_work+0x2dc/0x500
worker_thread+0x240/0x460
kthread+0x1c0/0x1d0
ret_from_fork+0x10/0x20
The buggy address belongs to the cache kmalloc-2k of size 2048
The buggy address is located 1024 bytes to the right of
allocated 1560-byte region [ffff0000c7299000, ffff0000c7299618)
Guard nci_target_auto_activated() with the same check used by
nci_add_new_target().
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 Version: 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 Version: 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 Version: 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 Version: 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 Version: 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 Version: 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 Version: 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 Version: 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 |
||
{
"containers": {
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{
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"product": "Linux",
"programFiles": [
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"version": "3.4"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "5.10.267",
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},
{
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{
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{
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},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.3-rc1",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
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],
"negate": false,
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: nci: fix out-of-bounds write in nci_target_auto_activated()\n\nnci_target_auto_activated() appends a target to the fixed-size array\nndev-\u003etargets[NCI_MAX_DISCOVERED_TARGETS] and increments ndev-\u003en_targets\nwithout first checking the array is full; unlike its sibling\nnci_add_new_target(), which bails out when n_targets already equals\nNCI_MAX_DISCOVERED_TARGETS.\n\nndev-\u003en_targets is only cleared by nci_clear_target_list(), so an NFCC\nthat repeatedly re-runs discovery (RF_DISCOVER_RSP, which re-enters\nNCI_DISCOVERY without clearing the target list) and reports an\nauto-activated target (RF_INTF_ACTIVATED_NTF) drives n_targets past the\nlimit. The append then writes a struct nfc_target past the end of the\narray (a slab out-of-bounds write), and nfc_targets_found() goes on to\nwalk the array with the inflated count:\n\n BUG: KASAN: slab-out-of-bounds in nci_add_new_protocol+0x94/0x2ac [nci]\n Write of size 2 at addr ffff0000c7299a18 by task kworker/u8:0/12\n Workqueue: nfc0_nci_rx_wq nci_rx_work [nci]\n Call trace:\n nci_add_new_protocol+0x94/0x2ac [nci]\n nci_ntf_packet+0xddc/0x11a0 [nci]\n nci_rx_work+0x15c/0x1e0 [nci]\n process_one_work+0x2dc/0x500\n worker_thread+0x240/0x460\n kthread+0x1c0/0x1d0\n ret_from_fork+0x10/0x20\n\n The buggy address belongs to the cache kmalloc-2k of size 2048\n The buggy address is located 1024 bytes to the right of\n allocated 1560-byte region [ffff0000c7299000, ffff0000c7299618)\n\nGuard nci_target_auto_activated() with the same check used by\nnci_add_new_target()."
}
],
"providerMetadata": {
"dateUpdated": "2026-09-04T15:13:08.640Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/0dc59de0075f88404a0f4a2b5233104ef459fbb2"
},
{
"url": "https://git.kernel.org/stable/c/94530ffabfca57e9bff1d207106010014cc84032"
},
{
"url": "https://git.kernel.org/stable/c/afd8605fb43becb892311102844955c3b127fc7e"
},
{
"url": "https://git.kernel.org/stable/c/24761d3a5f692df5f7d848caeabcb2afd10917aa"
},
{
"url": "https://git.kernel.org/stable/c/50e87e1c0e18d791dcd7dccf30f9a2f3e2cf3951"
},
{
"url": "https://git.kernel.org/stable/c/2f08dbce3b37624ec6b424d759336a99586170ec"
},
{
"url": "https://git.kernel.org/stable/c/d7083f41c21b30582e91b2e6de4d54dce74f6f9c"
},
{
"url": "https://git.kernel.org/stable/c/129032c0616d83a5e3e304f6ebf88f14ba01e5f7"
},
{
"url": "https://git.kernel.org/stable/c/ac200079db50af81e6b04d058b33ec92901d8edd"
}
],
"title": "nfc: nci: fix out-of-bounds write in nci_target_auto_activated()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-80795",
"datePublished": "2026-09-04T15:13:08.640Z",
"dateReserved": "2026-08-26T14:34:25.793Z",
"dateUpdated": "2026-09-04T15:13:08.640Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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