CVE-2026-80795nfc: nci: fix out-of-bounds write in nci_target_auto_activated()
- —Not scoredno CVSS score yet
- 0.19%Exploitation in 30 daysEPSS · top 91% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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().
Timeline
ID reserved
By Linux
- 9 days later
· 9 days later
Published
- 45 days later
· 45 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.19% · top 91% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 – < 0dc59de0075f88404a0f4a2b5233104ef459fbb2
- affected 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 – < 94530ffabfca57e9bff1d207106010014cc84032
- affected 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 – < afd8605fb43becb892311102844955c3b127fc7e
- affected 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 – < 24761d3a5f692df5f7d848caeabcb2afd10917aa
- affected 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 – < 50e87e1c0e18d791dcd7dccf30f9a2f3e2cf3951
- affected 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 – < 2f08dbce3b37624ec6b424d759336a99586170ec
- affected 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 – < d7083f41c21b30582e91b2e6de4d54dce74f6f9c
- affected 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 – < 129032c0616d83a5e3e304f6ebf88f14ba01e5f7
- affected 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 – < ac200079db50af81e6b04d058b33ec92901d8edd
- affected 3.4
- unaffected < 3.4
- unaffected 5.10.267 – ≤ 5.10.*
- unaffected 5.15.218 – ≤ 5.15.*
- unaffected 6.1.185 – ≤ 6.1.*
- unaffected 6.6.154 – ≤ 6.6.*
- unaffected 6.12.106 – ≤ 6.12.*
- unaffected 6.18.47 – ≤ 6.18.*
- unaffected 7.1.11 – ≤ 7.1.*
- unaffected 7.2.1 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References9
- https://git.kernel.org/stable/c/0dc59de0075f88404a0f4a2b5233104ef459fbb2 (opens in a new tab)
- https://git.kernel.org/stable/c/94530ffabfca57e9bff1d207106010014cc84032 (opens in a new tab)
- https://git.kernel.org/stable/c/afd8605fb43becb892311102844955c3b127fc7e (opens in a new tab)
- https://git.kernel.org/stable/c/24761d3a5f692df5f7d848caeabcb2afd10917aa (opens in a new tab)
- https://git.kernel.org/stable/c/50e87e1c0e18d791dcd7dccf30f9a2f3e2cf3951 (opens in a new tab)
- https://git.kernel.org/stable/c/2f08dbce3b37624ec6b424d759336a99586170ec (opens in a new tab)
- https://git.kernel.org/stable/c/d7083f41c21b30582e91b2e6de4d54dce74f6f9c (opens in a new tab)
- https://git.kernel.org/stable/c/129032c0616d83a5e3e304f6ebf88f14ba01e5f7 (opens in a new tab)
- https://git.kernel.org/stable/c/ac200079db50af81e6b04d058b33ec92901d8edd (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-71438 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2026-80795)Record last updated .