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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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{
  "containers": {
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            {
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              "version": "7.2.1",
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            {
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              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
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          "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()."
        }
      ],
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        "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"
        },
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          "url": "https://git.kernel.org/stable/c/50e87e1c0e18d791dcd7dccf30f9a2f3e2cf3951"
        },
        {
          "url": "https://git.kernel.org/stable/c/2f08dbce3b37624ec6b424d759336a99586170ec"
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          "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()",
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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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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-80795",
      "date": "2026-09-18",
      "epss": "0.00195",
      "percentile": "0.09535"
    },
    "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": {
        "affected": [
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              {
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                "product": "Linux",
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                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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                  {
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                    "status": "affected",
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                    "versionType": "git"
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                    "versionType": "semver"
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                    "versionType": "semver"
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                  {
                    "lessThanOrEqual": "6.1.*",
                    "status": "unaffected",
                    "version": "6.1.185",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.6.*",
                    "status": "unaffected",
                    "version": "6.6.154",
                    "versionType": "semver"
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                  {
                    "lessThanOrEqual": "6.12.*",
                    "status": "unaffected",
                    "version": "6.12.106",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.18.*",
                    "status": "unaffected",
                    "version": "6.18.47",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "7.1.*",
                    "status": "unaffected",
                    "version": "7.1.11",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "7.2.*",
                    "status": "unaffected",
                    "version": "7.2.1",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
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                    "version": "7.3-rc1",
                    "versionType": "original_commit_for_fix"
                  }
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              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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        "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()."
          }
        ],
        "id": "CVE-2026-80795",
        "lastModified": "2026-09-04T16:18:06.020",
        "metrics": {},
        "published": "2026-09-04T16:18:06.020",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "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"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-15T01:08:22Z",
      "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",
      "product_status:recommended": "4",
      "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": "5"
    }
  }
}



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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

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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.