nfc: nci: fix out-of-bounds write in nci_target_auto_activated()
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() wi
CVE-2026-80795
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-2026-80795
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": "019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5",
"lessThan": "0dc59de0075f88404a0f4a2b5233104ef459fbb2",
"versionType": "git"
},
{
"status": "affected",
"version": "019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5",
"lessThan": "94530ffabfca57e9bff1d207106010014cc84032",
"versionType": "git"
},
{
"status": "affected",
"version": "019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5",
"lessThan": "afd8605fb43becb892311102844955c3b127fc7e",
"versionType": "git"
},
{
"status": "affected",
"version": "019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5",
"lessThan": "24761d3a5f692df5f7d848caeabcb2afd10917aa",
"versionType": "git"
},
{
"status": "affected",
"version": "019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5",
"lessThan": "50e87e1c0e18d791dcd7dccf30f9a2f3e2cf3951",
"versionType": "git"
},
{
"status": "affected",
"version": "019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5",
"lessThan": "2f08dbce3b37624ec6b424d759336a99586170ec",
"versionType": "git"
},
{
"status": "affected",
"version": "019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5",
"lessThan": "d7083f41c21b30582e91b2e6de4d54dce74f6f9c",
"versionType": "git"
},
{
"status": "affected",
"version": "019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5",
"lessThan": "129032c0616d83a5e3e304f6ebf88f14ba01e5f7",
"versionType": "git"
},
{
"status": "affected",
"version": "019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5",
"lessThan": "ac200079db50af81e6b04d058b33ec92901d8edd",
"versionType": "git"
}
],
"programFiles": [
"net/nfc/nci/ntf.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.4"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.267",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.218",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.185",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.154",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.106",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.47",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.11",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2.1",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/nfc/nci/ntf.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80795
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #34813 · Revision 1
- Added to Heist Feed
- Publisher date