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CVE-2026-80795 (GCVE-0-2026-80795)

Vulnerability from cvelistv5 – Published: 2026-09-04 15:13 – Updated: 2026-09-04 15:13
VLAI
Title
nfc: nci: fix out-of-bounds write in nci_target_auto_activated()
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().
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 , < 0dc59de0075f88404a0f4a2b5233104ef459fbb2 (git)
Affected: 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 , < 94530ffabfca57e9bff1d207106010014cc84032 (git)
Affected: 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 , < afd8605fb43becb892311102844955c3b127fc7e (git)
Affected: 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 , < 24761d3a5f692df5f7d848caeabcb2afd10917aa (git)
Affected: 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 , < 50e87e1c0e18d791dcd7dccf30f9a2f3e2cf3951 (git)
Affected: 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 , < 2f08dbce3b37624ec6b424d759336a99586170ec (git)
Affected: 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 , < d7083f41c21b30582e91b2e6de4d54dce74f6f9c (git)
Affected: 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 , < 129032c0616d83a5e3e304f6ebf88f14ba01e5f7 (git)
Affected: 019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5 , < ac200079db50af81e6b04d058b33ec92901d8edd (git)
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Linux Linux Affected: 3.4
Unaffected: 0 , < 3.4 (semver)
Unaffected: 5.10.267 , ≤ 5.10.* (semver)
Unaffected: 5.15.218 , ≤ 5.15.* (semver)
Unaffected: 6.1.185 , ≤ 6.1.* (semver)
Unaffected: 6.6.154 , ≤ 6.6.* (semver)
Unaffected: 6.12.106 , ≤ 6.12.* (semver)
Unaffected: 6.18.47 , ≤ 6.18.* (semver)
Unaffected: 7.1.11 , ≤ 7.1.* (semver)
Unaffected: 7.2.1 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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          "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()."
        }
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        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/0dc59de0075f88404a0f4a2b5233104ef459fbb2"
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        {
          "url": "https://git.kernel.org/stable/c/94530ffabfca57e9bff1d207106010014cc84032"
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          "url": "https://git.kernel.org/stable/c/afd8605fb43becb892311102844955c3b127fc7e"
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        },
        {
          "url": "https://git.kernel.org/stable/c/ac200079db50af81e6b04d058b33ec92901d8edd"
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      ],
      "title": "nfc: nci: fix out-of-bounds write in nci_target_auto_activated()",
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    "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"
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  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-80795",
      "date": "2026-09-15",
      "epss": "0.00195",
      "percentile": "0.09418"
    },
    "microsoft_vex": {
      "current_release_date": "2026-09-06T04:47:46.000Z",
      "cve": "CVE-2026-80795",
      "id": "msrc_CVE-2026-80795",
      "initial_release_date": "2026-09-06T04:47:46.000Z",
      "product_status:under_investigation": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "nfc: nci: fix out-of-bounds write in nci_target_auto_activated()",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-80795.json",
      "version": "1"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-80795\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-09-04T16:18:06.020\",\"lastModified\":\"2026-09-04T16:18:06.020\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"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().\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/nfc/nci/ntf.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"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\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/nfc/nci/ntf.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.4\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.4\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.267\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.218\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.185\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.154\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.106\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.47\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.11\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.1\",\"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/0dc59de0075f88404a0f4a2b5233104ef459fbb2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/129032c0616d83a5e3e304f6ebf88f14ba01e5f7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/24761d3a5f692df5f7d848caeabcb2afd10917aa\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2f08dbce3b37624ec6b424d759336a99586170ec\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/50e87e1c0e18d791dcd7dccf30f9a2f3e2cf3951\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/94530ffabfca57e9bff1d207106010014cc84032\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ac200079db50af81e6b04d058b33ec92901d8edd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/afd8605fb43becb892311102844955c3b127fc7e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d7083f41c21b30582e91b2e6de4d54dce74f6f9c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-08T23:58:47Z",
      "cve": "CVE-2026-80795",
      "id": "CVE-2026-80795",
      "initial_release_date": "2026-09-05T00:27:14Z",
      "product_status:known_affected": "265",
      "product_status:known_not_affected": "88",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-80795",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-80795.json",
      "version": "4"
    }
  }
}



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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.


Detection rules are retrieved from Rulezet.