{"id":"CVE-2021-47456","state":"PUBLISHED","title":"can: peak_pci: peak_pci_remove(): fix UAF","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: peak_pci: peak_pci_remove(): fix UAF\n\nWhen remove the module peek_pci, referencing 'chan' again after\nreleasing 'dev' will cause UAF.\n\nFix this by releasing 'dev' later.\n\nThe following log reveals it:\n\n[   35.961814 ] BUG: KASAN: use-after-free in peak_pci_remove+0x16f/0x270 [peak_pci]\n[   35.963414 ] Read of size 8 at addr ffff888136998ee8 by task modprobe/5537\n[   35.965513 ] Call Trace:\n[   35.965718 ]  dump_stack_lvl+0xa8/0xd1\n[   35.966028 ]  print_address_description+0x87/0x3b0\n[   35.966420 ]  kasan_report+0x172/0x1c0\n[   35.966725 ]  ? peak_pci_remove+0x16f/0x270 [peak_pci]\n[   35.967137 ]  ? trace_irq_enable_rcuidle+0x10/0x170\n[   35.967529 ]  ? peak_pci_remove+0x16f/0x270 [peak_pci]\n[   35.967945 ]  __asan_report_load8_noabort+0x14/0x20\n[   35.968346 ]  peak_pci_remove+0x16f/0x270 [peak_pci]\n[   35.968752 ]  pci_device_remove+0xa9/0x250","publishedAt":"2024-05-22T06:19:45.363Z","updatedAt":"2026-05-11T13:55:04.351Z","severity":{"score":8.4,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd","status":"affected","lessThan":"1c616528ba4aeb1125a06b407572ab7b56acae38","versionType":"git"},{"version":"e6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd","status":"affected","lessThan":"447d44cd2f67a20b596ede3ca3cd67086dfd9ca9","versionType":"git"},{"version":"e6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd","status":"affected","lessThan":"34914971bb3244db4ce2be44e9438a9b30c56250","versionType":"git"},{"version":"e6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd","status":"affected","lessThan":"adbda14730aacce41c0d3596415aa39ad63eafd9","versionType":"git"},{"version":"e6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd","status":"affected","lessThan":"1248582e47a9f7ce0ecd156c39fc61f8b6aa3699","versionType":"git"},{"version":"e6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd","status":"affected","lessThan":"28f28e4bc3a5e0051faa963f10b778ab38c1db69","versionType":"git"},{"version":"e6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd","status":"affected","lessThan":"0e5afdc2315b0737edcf55bede4ee1640d2d464d","versionType":"git"},{"version":"e6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd","status":"affected","lessThan":"949fe9b35570361bc6ee2652f89a0561b26eec98","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/can/sja1000/peak_pci.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.4","versionType":"semver"},{"version":"4.4.290","status":"unaffected","lessThanOrEqual":"4.4.*","versionType":"semver"},{"version":"4.9.288","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.253","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.214","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.156","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.76","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.14.15","status":"unaffected","lessThanOrEqual":"5.14.*","versionType":"semver"},{"version":"5.15","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/can/sja1000/peak_pci.c"]}],"references":["https://git.kernel.org/stable/c/1c616528ba4aeb1125a06b407572ab7b56acae38","https://git.kernel.org/stable/c/447d44cd2f67a20b596ede3ca3cd67086dfd9ca9","https://git.kernel.org/stable/c/34914971bb3244db4ce2be44e9438a9b30c56250","https://git.kernel.org/stable/c/adbda14730aacce41c0d3596415aa39ad63eafd9","https://git.kernel.org/stable/c/1248582e47a9f7ce0ecd156c39fc61f8b6aa3699","https://git.kernel.org/stable/c/28f28e4bc3a5e0051faa963f10b778ab38c1db69","https://git.kernel.org/stable/c/0e5afdc2315b0737edcf55bede4ee1640d2d464d","https://git.kernel.org/stable/c/949fe9b35570361bc6ee2652f89a0561b26eec98"],"weaknesses":["CWE-416","CWE-467"],"ingestedAt":"2026-10-29T19:49:19.404Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/47xxx/CVE-2021-47456.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47456","state":"PUBLISHED","datePublished":"2024-05-22T06:19:45.363Z","dateUpdated":"2026-05-11T13:55:04.351Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-05-21T14:58:30.833Z"},"containers":{"cna":{"title":"can: peak_pci: peak_pci_remove(): fix UAF","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: peak_pci: peak_pci_remove(): fix UAF\n\nWhen remove the module peek_pci, referencing 'chan' again after\nreleasing 'dev' will cause UAF.\n\nFix this by releasing 'dev' later.\n\nThe following log reveals it:\n\n[   35.961814 ] BUG: KASAN: use-after-free in peak_pci_remove+0x16f/0x270 [peak_pci]\n[   35.963414 ] Read of size 8 at addr ffff888136998ee8 by task modprobe/5537\n[   35.965513 ] Call Trace:\n[   35.965718 ]  dump_stack_lvl+0xa8/0xd1\n[   35.966028 ]  print_address_description+0x87/0x3b0\n[   35.966420 ]  kasan_report+0x172/0x1c0\n[   35.966725 ]  ? peak_pci_remove+0x16f/0x270 [peak_pci]\n[   35.967137 ]  ? trace_irq_enable_rcuidle+0x10/0x170\n[   35.967529 ]  ? peak_pci_remove+0x16f/0x270 [peak_pci]\n[   35.967945 ]  __asan_report_load8_noabort+0x14/0x20\n[   35.968346 ]  peak_pci_remove+0x16f/0x270 [peak_pci]\n[   35.968752 ]  pci_device_remove+0xa9/0x250"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd","status":"affected","lessThan":"1c616528ba4aeb1125a06b407572ab7b56acae38","versionType":"git"},{"version":"e6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd","status":"affected","lessThan":"447d44cd2f67a20b596ede3ca3cd67086dfd9ca9","versionType":"git"},{"version":"e6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd","status":"affected","lessThan":"34914971bb3244db4ce2be44e9438a9b30c56250","versionType":"git"},{"version":"e6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd","status":"affected","lessThan":"adbda14730aacce41c0d3596415aa39ad63eafd9","versionType":"git"},{"version":"e6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd","status":"affected","lessThan":"1248582e47a9f7ce0ecd156c39fc61f8b6aa3699","versionType":"git"},{"version":"e6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd","status":"affected","lessThan":"28f28e4bc3a5e0051faa963f10b778ab38c1db69","versionType":"git"},{"version":"e6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd","status":"affected","lessThan":"0e5afdc2315b0737edcf55bede4ee1640d2d464d","versionType":"git"},{"version":"e6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd","status":"affected","lessThan":"949fe9b35570361bc6ee2652f89a0561b26eec98","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/can/sja1000/peak_pci.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.4","versionType":"semver"},{"version":"4.4.290","status":"unaffected","lessThanOrEqual":"4.4.*","versionType":"semver"},{"version":"4.9.288","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.253","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.214","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.156","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.76","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.14.15","status":"unaffected","lessThanOrEqual":"5.14.*","versionType":"semver"},{"version":"5.15","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/can/sja1000/peak_pci.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/1c616528ba4aeb1125a06b407572ab7b56acae38"},{"url":"https://git.kernel.org/stable/c/447d44cd2f67a20b596ede3ca3cd67086dfd9ca9"},{"url":"https://git.kernel.org/stable/c/34914971bb3244db4ce2be44e9438a9b30c56250"},{"url":"https://git.kernel.org/stable/c/adbda14730aacce41c0d3596415aa39ad63eafd9"},{"url":"https://git.kernel.org/stable/c/1248582e47a9f7ce0ecd156c39fc61f8b6aa3699"},{"url":"https://git.kernel.org/stable/c/28f28e4bc3a5e0051faa963f10b778ab38c1db69"},{"url":"https://git.kernel.org/stable/c/0e5afdc2315b0737edcf55bede4ee1640d2d464d"},{"url":"https://git.kernel.org/stable/c/949fe9b35570361bc6ee2652f89a0561b26eec98"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T13:55:04.351Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"4.4.290"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"4.9.288"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"4.14.253"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"4.19.214"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"5.4.156"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"5.10.76"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"5.14.15"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"5.15"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA 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