{"id":"CVE-2026-80795","state":"PUBLISHED","title":"nfc: nci: fix out-of-bounds write in nci_target_auto_activated()","description":"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->targets[NCI_MAX_DISCOVERED_TARGETS] and increments ndev->n_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->n_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().","publishedAt":"2026-09-04T15:13:08.640Z","updatedAt":"2026-10-19T08:43:48.491Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","status":"affected","lessThan":"0dc59de0075f88404a0f4a2b5233104ef459fbb2","versionType":"git"},{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","status":"affected","lessThan":"94530ffabfca57e9bff1d207106010014cc84032","versionType":"git"},{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","status":"affected","lessThan":"afd8605fb43becb892311102844955c3b127fc7e","versionType":"git"},{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","status":"affected","lessThan":"24761d3a5f692df5f7d848caeabcb2afd10917aa","versionType":"git"},{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","status":"affected","lessThan":"50e87e1c0e18d791dcd7dccf30f9a2f3e2cf3951","versionType":"git"},{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","status":"affected","lessThan":"2f08dbce3b37624ec6b424d759336a99586170ec","versionType":"git"},{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","status":"affected","lessThan":"d7083f41c21b30582e91b2e6de4d54dce74f6f9c","versionType":"git"},{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","status":"affected","lessThan":"129032c0616d83a5e3e304f6ebf88f14ba01e5f7","versionType":"git"},{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","status":"affected","lessThan":"ac200079db50af81e6b04d058b33ec92901d8edd","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/nfc/nci/ntf.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.4","versionType":"semver"},{"version":"5.10.267","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.218","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.185","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.154","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.106","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.47","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.11","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2.1","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/nfc/nci/ntf.c"]}],"references":["https://git.kernel.org/stable/c/0dc59de0075f88404a0f4a2b5233104ef459fbb2","https://git.kernel.org/stable/c/94530ffabfca57e9bff1d207106010014cc84032","https://git.kernel.org/stable/c/afd8605fb43becb892311102844955c3b127fc7e","https://git.kernel.org/stable/c/24761d3a5f692df5f7d848caeabcb2afd10917aa","https://git.kernel.org/stable/c/50e87e1c0e18d791dcd7dccf30f9a2f3e2cf3951","https://git.kernel.org/stable/c/2f08dbce3b37624ec6b424d759336a99586170ec","https://git.kernel.org/stable/c/d7083f41c21b30582e91b2e6de4d54dce74f6f9c","https://git.kernel.org/stable/c/129032c0616d83a5e3e304f6ebf88f14ba01e5f7","https://git.kernel.org/stable/c/ac200079db50af81e6b04d058b33ec92901d8edd"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/80xxx/CVE-2026-80795.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80795","state":"PUBLISHED","datePublished":"2026-09-04T15:13:08.640Z","dateUpdated":"2026-10-19T08:43:48.491Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-26T14:34:25.793Z"},"containers":{"cna":{"title":"nfc: nci: fix out-of-bounds write in nci_target_auto_activated()","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->targets[NCI_MAX_DISCOVERED_TARGETS] and increments ndev->n_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->n_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":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","status":"affected","lessThan":"0dc59de0075f88404a0f4a2b5233104ef459fbb2","versionType":"git"},{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","status":"affected","lessThan":"94530ffabfca57e9bff1d207106010014cc84032","versionType":"git"},{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","status":"affected","lessThan":"afd8605fb43becb892311102844955c3b127fc7e","versionType":"git"},{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","status":"affected","lessThan":"24761d3a5f692df5f7d848caeabcb2afd10917aa","versionType":"git"},{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","status":"affected","lessThan":"50e87e1c0e18d791dcd7dccf30f9a2f3e2cf3951","versionType":"git"},{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","status":"affected","lessThan":"2f08dbce3b37624ec6b424d759336a99586170ec","versionType":"git"},{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","status":"affected","lessThan":"d7083f41c21b30582e91b2e6de4d54dce74f6f9c","versionType":"git"},{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","status":"affected","lessThan":"129032c0616d83a5e3e304f6ebf88f14ba01e5f7","versionType":"git"},{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","status":"affected","lessThan":"ac200079db50af81e6b04d058b33ec92901d8edd","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/nfc/nci/ntf.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.4","versionType":"semver"},{"version":"5.10.267","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.218","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.185","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.154","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.106","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.47","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.11","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2.1","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/nfc/nci/ntf.c"]}],"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"},{"url":"https://git.kernel.org/stable/c/50e87e1c0e18d791dcd7dccf30f9a2f3e2cf3951"},{"url":"https://git.kernel.org/stable/c/2f08dbce3b37624ec6b424d759336a99586170ec"},{"url":"https://git.kernel.org/stable/c/d7083f41c21b30582e91b2e6de4d54dce74f6f9c"},{"url":"https://git.kernel.org/stable/c/129032c0616d83a5e3e304f6ebf88f14ba01e5f7"},{"url":"https://git.kernel.org/stable/c/ac200079db50af81e6b04d058b33ec92901d8edd"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:43:48.491Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"5.10.267"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"5.15.218"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"6.1.185"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"6.6.154"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"6.12.106"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"6.18.47"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"7.1.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"7.2.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}