nfc: nci: fix out-of-bounds write in nci_target_auto_activated()
Summary
| CVE | CVE-2026-80795 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-04 16:18:06 UTC |
| Updated | 2026-09-04 16:18:06 UTC |
| Description | 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(). |
Risk And Classification
EPSS: 0.001950000 probability, percentile 0.092720000 (date 2026-09-05)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 0dc59de0075f88404a0f4a2b5233104ef459fbb2 git | Not specified |
| CNA | Linux | Linux | affected 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 94530ffabfca57e9bff1d207106010014cc84032 git | Not specified |
| CNA | Linux | Linux | affected 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 afd8605fb43becb892311102844955c3b127fc7e git | Not specified |
| CNA | Linux | Linux | affected 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 24761d3a5f692df5f7d848caeabcb2afd10917aa git | Not specified |
| CNA | Linux | Linux | affected 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 50e87e1c0e18d791dcd7dccf30f9a2f3e2cf3951 git | Not specified |
| CNA | Linux | Linux | affected 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 2f08dbce3b37624ec6b424d759336a99586170ec git | Not specified |
| CNA | Linux | Linux | affected 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 d7083f41c21b30582e91b2e6de4d54dce74f6f9c git | Not specified |
| CNA | Linux | Linux | affected 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 129032c0616d83a5e3e304f6ebf88f14ba01e5f7 git | Not specified |
| CNA | Linux | Linux | affected 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 ac200079db50af81e6b04d058b33ec92901d8edd git | Not specified |
| CNA | Linux | Linux | affected 3.4 | Not specified |
| CNA | Linux | Linux | unaffected 3.4 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.267 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.218 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.185 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.154 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.106 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.47 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.11 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2.1 7.2.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.3-rc1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/d7083f41c21b30582e91b2e6de4d54dce74f6f9c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/ac200079db50af81e6b04d058b33ec92901d8edd | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/24761d3a5f692df5f7d848caeabcb2afd10917aa | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/0dc59de0075f88404a0f4a2b5233104ef459fbb2 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/94530ffabfca57e9bff1d207106010014cc84032 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/afd8605fb43becb892311102844955c3b127fc7e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/129032c0616d83a5e3e304f6ebf88f14ba01e5f7 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/2f08dbce3b37624ec6b424d759336a99586170ec | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/50e87e1c0e18d791dcd7dccf30f9a2f3e2cf3951 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.