{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80795","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-08-26T14:34:25.793Z","datePublished":"2026-09-04T15:13:08.640Z","dateUpdated":"2026-09-04T15:13:08.640Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-04T15:13:08.640Z"},"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":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/nfc/nci/ntf.c"],"versions":[{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","lessThan":"0dc59de0075f88404a0f4a2b5233104ef459fbb2","status":"affected","versionType":"git"},{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","lessThan":"94530ffabfca57e9bff1d207106010014cc84032","status":"affected","versionType":"git"},{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","lessThan":"afd8605fb43becb892311102844955c3b127fc7e","status":"affected","versionType":"git"},{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","lessThan":"24761d3a5f692df5f7d848caeabcb2afd10917aa","status":"affected","versionType":"git"},{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","lessThan":"50e87e1c0e18d791dcd7dccf30f9a2f3e2cf3951","status":"affected","versionType":"git"},{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","lessThan":"2f08dbce3b37624ec6b424d759336a99586170ec","status":"affected","versionType":"git"},{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","lessThan":"d7083f41c21b30582e91b2e6de4d54dce74f6f9c","status":"affected","versionType":"git"},{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","lessThan":"129032c0616d83a5e3e304f6ebf88f14ba01e5f7","status":"affected","versionType":"git"},{"version":"019c4fbaa790e2b3f11dab0c8b7d9896d77db3e5","lessThan":"ac200079db50af81e6b04d058b33ec92901d8edd","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/nfc/nci/ntf.c"],"versions":[{"version":"3.4","status":"affected"},{"version":"0","lessThan":"3.4","status":"unaffected","versionType":"semver"},{"version":"5.10.267","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.218","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.185","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.154","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.106","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.47","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.1.11","lessThanOrEqual":"7.1.*","status":"unaffected","versionType":"semver"},{"version":"7.2.1","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"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-rc1"}]}]}],"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"}],"title":"nfc: nci: fix out-of-bounds write in nci_target_auto_activated()","x_generator":{"engine":"bippy-1.2.0"}}}}