{"id":"CVE-2021-46924","state":"PUBLISHED","title":"NFC: st21nfca: Fix memory leak in device probe and remove","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nNFC: st21nfca: Fix memory leak in device probe and remove\n\n'phy->pending_skb' is alloced when device probe, but forgot to free\nin the error handling path and remove path, this cause memory leak\nas follows:\n\nunreferenced object 0xffff88800bc06800 (size 512):\n  comm \"8\", pid 11775, jiffies 4295159829 (age 9.032s)\n  hex dump (first 32 bytes):\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n  backtrace:\n    [<00000000d66c09ce>] __kmalloc_node_track_caller+0x1ed/0x450\n    [<00000000c93382b3>] kmalloc_reserve+0x37/0xd0\n    [<000000005fea522c>] __alloc_skb+0x124/0x380\n    [<0000000019f29f9a>] st21nfca_hci_i2c_probe+0x170/0x8f2\n\nFix it by freeing 'pending_skb' in error and remove.","publishedAt":"2024-02-27T09:43:54.792Z","updatedAt":"2026-05-11T13:44:32.039Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"68957303f44a501af5cf37913208a2acaa6bcdf1","status":"affected","lessThan":"38c3e320e7ff46f2dc67bc5045333e63d9f8918d","versionType":"git"},{"version":"68957303f44a501af5cf37913208a2acaa6bcdf1","status":"affected","lessThan":"a1e0080a35a16ce3808f7040fe0c3a8fdb052349","versionType":"git"},{"version":"68957303f44a501af5cf37913208a2acaa6bcdf1","status":"affected","lessThan":"1cd4063dbc91cf7965d73a6a3855e2028cd4613b","versionType":"git"},{"version":"68957303f44a501af5cf37913208a2acaa6bcdf1","status":"affected","lessThan":"e553265ea56482da5700f56319fda9ff53e7dcb4","versionType":"git"},{"version":"68957303f44a501af5cf37913208a2acaa6bcdf1","status":"affected","lessThan":"238920381b8925d070d32d73cd9ce52ab29896fe","versionType":"git"},{"version":"68957303f44a501af5cf37913208a2acaa6bcdf1","status":"affected","lessThan":"1b9dadba502234eea7244879b8d5d126bfaf9f0c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nfc/st21nfca/i2c.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.16","versionType":"semver"},{"version":"4.14.261","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.224","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.170","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.90","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.13","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nfc/st21nfca/i2c.c"]}],"references":["https://git.kernel.org/stable/c/38c3e320e7ff46f2dc67bc5045333e63d9f8918d","https://git.kernel.org/stable/c/a1e0080a35a16ce3808f7040fe0c3a8fdb052349","https://git.kernel.org/stable/c/1cd4063dbc91cf7965d73a6a3855e2028cd4613b","https://git.kernel.org/stable/c/e553265ea56482da5700f56319fda9ff53e7dcb4","https://git.kernel.org/stable/c/238920381b8925d070d32d73cd9ce52ab29896fe","https://git.kernel.org/stable/c/1b9dadba502234eea7244879b8d5d126bfaf9f0c"],"weaknesses":[],"ingestedAt":"2026-10-29T19:49:16.371Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/46xxx/CVE-2021-46924.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-46924","state":"PUBLISHED","datePublished":"2024-02-27T09:43:54.792Z","dateUpdated":"2026-05-11T13:44:32.039Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-02-25T13:45:52.719Z"},"containers":{"cna":{"title":"NFC: st21nfca: Fix memory leak in device probe and remove","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nNFC: st21nfca: Fix memory leak in device probe and remove\n\n'phy->pending_skb' is alloced when device probe, but forgot to free\nin the error handling path and remove path, this cause memory leak\nas follows:\n\nunreferenced object 0xffff88800bc06800 (size 512):\n  comm \"8\", pid 11775, jiffies 4295159829 (age 9.032s)\n  hex dump (first 32 bytes):\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n  backtrace:\n    [<00000000d66c09ce>] __kmalloc_node_track_caller+0x1ed/0x450\n    [<00000000c93382b3>] kmalloc_reserve+0x37/0xd0\n    [<000000005fea522c>] __alloc_skb+0x124/0x380\n    [<0000000019f29f9a>] st21nfca_hci_i2c_probe+0x170/0x8f2\n\nFix it by freeing 'pending_skb' in error and remove."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"68957303f44a501af5cf37913208a2acaa6bcdf1","status":"affected","lessThan":"38c3e320e7ff46f2dc67bc5045333e63d9f8918d","versionType":"git"},{"version":"68957303f44a501af5cf37913208a2acaa6bcdf1","status":"affected","lessThan":"a1e0080a35a16ce3808f7040fe0c3a8fdb052349","versionType":"git"},{"version":"68957303f44a501af5cf37913208a2acaa6bcdf1","status":"affected","lessThan":"1cd4063dbc91cf7965d73a6a3855e2028cd4613b","versionType":"git"},{"version":"68957303f44a501af5cf37913208a2acaa6bcdf1","status":"affected","lessThan":"e553265ea56482da5700f56319fda9ff53e7dcb4","versionType":"git"},{"version":"68957303f44a501af5cf37913208a2acaa6bcdf1","status":"affected","lessThan":"238920381b8925d070d32d73cd9ce52ab29896fe","versionType":"git"},{"version":"68957303f44a501af5cf37913208a2acaa6bcdf1","status":"affected","lessThan":"1b9dadba502234eea7244879b8d5d126bfaf9f0c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nfc/st21nfca/i2c.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.16","versionType":"semver"},{"version":"4.14.261","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.224","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.170","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.90","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.13","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nfc/st21nfca/i2c.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/38c3e320e7ff46f2dc67bc5045333e63d9f8918d"},{"url":"https://git.kernel.org/stable/c/a1e0080a35a16ce3808f7040fe0c3a8fdb052349"},{"url":"https://git.kernel.org/stable/c/1cd4063dbc91cf7965d73a6a3855e2028cd4613b"},{"url":"https://git.kernel.org/stable/c/e553265ea56482da5700f56319fda9ff53e7dcb4"},{"url":"https://git.kernel.org/stable/c/238920381b8925d070d32d73cd9ce52ab29896fe"},{"url":"https://git.kernel.org/stable/c/1b9dadba502234eea7244879b8d5d126bfaf9f0c"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T13:44:32.039Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"4.14.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"4.19.224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"5.4.170"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"5.10.90"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"5.15.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"5.16"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA 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