{"api_version":"1","generated_at":"2026-08-16T21:33:54+00:00","cve":"CVE-2026-72047","urls":{"html":"https://cve.report/CVE-2026-72047","api":"https://cve.report/api/cve/CVE-2026-72047.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-72047","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-72047"},"summary":{"title":"ieee802154: ca8210: fix pointer truncation in kfifo on 64-bit","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nieee802154: ca8210: fix pointer truncation in kfifo on 64-bit\n\nca8210_test_int_driver_write() and ca8210_test_int_user_read() exchange\na kmalloc'd buffer pointer through a struct kfifo, but pass a literal\n'4' as the byte count to kfifo_in()/kfifo_out().\n\nThis is correct on 32-bit (pointer = 4 bytes), but on 64-bit only the\nlow 4 bytes of the 8-byte pointer are written into the FIFO. The reader\nthen reads back 4 bytes into an 8-byte local pointer variable, leaving\nthe upper 4 bytes uninitialized stack data. The first dereference of\nthe reconstructed pointer (fifo_buffer[1]) accesses an arbitrary kernel\naddress and generally results in an oops.\n\nUse sizeof(fifo_buffer) so the byte count matches pointer width on every\narchitecture.\n\nThe driver has no architecture restriction in Kconfig, so any 64-bit\nbuild with CONFIG_IEEE802154_CA8210_DEBUGFS=y is exposed. Issue has\nbeen latent since the driver was added in 2017 because it is most\ncommonly deployed on 32-bit MCUs.\n\nFound via a custom Coccinelle semantic patch hunting for short-byte\nkfifo I/O on byte-mode kfifos used to shuttle pointers.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:21:13","updated_at":"2026-08-15 06:21:13"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/093aacb0c56d5c693e3169a0224062e77c3fd0c0","name":"https://git.kernel.org/stable/c/093aacb0c56d5c693e3169a0224062e77c3fd0c0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2c1664ccfae653979b38788211240b5a1ee317ed","name":"https://git.kernel.org/stable/c/2c1664ccfae653979b38788211240b5a1ee317ed","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6d7f7bcf225b2d566176bf6229dbd1252940cb3c","name":"https://git.kernel.org/stable/c/6d7f7bcf225b2d566176bf6229dbd1252940cb3c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d8ce67fa6a5e6929f5414e933ff9665176c2bce6","name":"https://git.kernel.org/stable/c/d8ce67fa6a5e6929f5414e933ff9665176c2bce6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1fe2643d0b24ca3cdd61a31a45c2d3233dc6cbfe","name":"https://git.kernel.org/stable/c/1fe2643d0b24ca3cdd61a31a45c2d3233dc6cbfe","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/65dc342274a01616f5c17105f7360a3b4bfd7a3d","name":"https://git.kernel.org/stable/c/65dc342274a01616f5c17105f7360a3b4bfd7a3d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/87dab14a4f68895d6f4d798e6ee3556cd64e8c72","name":"https://git.kernel.org/stable/c/87dab14a4f68895d6f4d798e6ee3556cd64e8c72","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2059c28bd725beded01277cdf1f67be33e714323","name":"https://git.kernel.org/stable/c/2059c28bd725beded01277cdf1f67be33e714323","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-72047","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72047","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ded845a781a578dfb0b5b2c138e5a067aa3b1242 2c1664ccfae653979b38788211240b5a1ee317ed git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ded845a781a578dfb0b5b2c138e5a067aa3b1242 093aacb0c56d5c693e3169a0224062e77c3fd0c0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ded845a781a578dfb0b5b2c138e5a067aa3b1242 87dab14a4f68895d6f4d798e6ee3556cd64e8c72 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ded845a781a578dfb0b5b2c138e5a067aa3b1242 1fe2643d0b24ca3cdd61a31a45c2d3233dc6cbfe git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.212 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.178 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"72047","cve":"CVE-2026-72047","epss":"0.002100000","percentile":"0.115350000","score_date":"2026-08-15","updated_at":"2026-08-16 00:00:33"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/ieee802154/ca8210.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"2c1664ccfae653979b38788211240b5a1ee317ed","status":"affected","version":"ded845a781a578dfb0b5b2c138e5a067aa3b1242","versionType":"git"},{"lessThan":"093aacb0c56d5c693e3169a0224062e77c3fd0c0","status":"affected","version":"ded845a781a578dfb0b5b2c138e5a067aa3b1242","versionType":"git"},{"lessThan":"87dab14a4f68895d6f4d798e6ee3556cd64e8c72","status":"affected","version":"ded845a781a578dfb0b5b2c138e5a067aa3b1242","versionType":"git"},{"lessThan":"1fe2643d0b24ca3cdd61a31a45c2d3233dc6cbfe","status":"affected","version":"ded845a781a578dfb0b5b2c138e5a067aa3b1242","versionType":"git"},{"lessThan":"65dc342274a01616f5c17105f7360a3b4bfd7a3d","status":"affected","version":"ded845a781a578dfb0b5b2c138e5a067aa3b1242","versionType":"git"},{"lessThan":"2059c28bd725beded01277cdf1f67be33e714323","status":"affected","version":"ded845a781a578dfb0b5b2c138e5a067aa3b1242","versionType":"git"},{"lessThan":"d8ce67fa6a5e6929f5414e933ff9665176c2bce6","status":"affected","version":"ded845a781a578dfb0b5b2c138e5a067aa3b1242","versionType":"git"},{"lessThan":"6d7f7bcf225b2d566176bf6229dbd1252940cb3c","status":"affected","version":"ded845a781a578dfb0b5b2c138e5a067aa3b1242","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/ieee802154/ca8210.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.12"},{"lessThan":"4.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.261","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.212","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.261","versionStartIncluding":"4.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.212","versionStartIncluding":"4.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.178","versionStartIncluding":"4.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"4.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"4.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"4.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"4.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"4.12","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nieee802154: ca8210: fix pointer truncation in kfifo on 64-bit\n\nca8210_test_int_driver_write() and ca8210_test_int_user_read() exchange\na kmalloc'd buffer pointer through a struct kfifo, but pass a literal\n'4' as the byte count to kfifo_in()/kfifo_out().\n\nThis is correct on 32-bit (pointer = 4 bytes), but on 64-bit only the\nlow 4 bytes of the 8-byte pointer are written into the FIFO. The reader\nthen reads back 4 bytes into an 8-byte local pointer variable, leaving\nthe upper 4 bytes uninitialized stack data. The first dereference of\nthe reconstructed pointer (fifo_buffer[1]) accesses an arbitrary kernel\naddress and generally results in an oops.\n\nUse sizeof(fifo_buffer) so the byte count matches pointer width on every\narchitecture.\n\nThe driver has no architecture restriction in Kconfig, so any 64-bit\nbuild with CONFIG_IEEE802154_CA8210_DEBUGFS=y is exposed. Issue has\nbeen latent since the driver was added in 2017 because it is most\ncommonly deployed on 32-bit MCUs.\n\nFound via a custom Coccinelle semantic patch hunting for short-byte\nkfifo I/O on byte-mode kfifos used to shuttle pointers."}],"providerMetadata":{"dateUpdated":"2026-08-15T05:52:05.510Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/2c1664ccfae653979b38788211240b5a1ee317ed"},{"url":"https://git.kernel.org/stable/c/093aacb0c56d5c693e3169a0224062e77c3fd0c0"},{"url":"https://git.kernel.org/stable/c/87dab14a4f68895d6f4d798e6ee3556cd64e8c72"},{"url":"https://git.kernel.org/stable/c/1fe2643d0b24ca3cdd61a31a45c2d3233dc6cbfe"},{"url":"https://git.kernel.org/stable/c/65dc342274a01616f5c17105f7360a3b4bfd7a3d"},{"url":"https://git.kernel.org/stable/c/2059c28bd725beded01277cdf1f67be33e714323"},{"url":"https://git.kernel.org/stable/c/d8ce67fa6a5e6929f5414e933ff9665176c2bce6"},{"url":"https://git.kernel.org/stable/c/6d7f7bcf225b2d566176bf6229dbd1252940cb3c"}],"title":"ieee802154: ca8210: fix pointer truncation in kfifo on 64-bit","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-72047","datePublished":"2026-08-15T05:52:05.510Z","dateReserved":"2026-08-09T03:40:39.902Z","dateUpdated":"2026-08-15T05:52:05.510Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:21:13","lastModifiedDate":"2026-08-15 06:21:13","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"72047","Ordinal":"1","Title":"ieee802154: ca8210: fix pointer truncation in kfifo on 64-bit","CVE":"CVE-2026-72047","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"72047","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nieee802154: ca8210: fix pointer truncation in kfifo on 64-bit\n\nca8210_test_int_driver_write() and ca8210_test_int_user_read() exchange\na kmalloc'd buffer pointer through a struct kfifo, but pass a literal\n'4' as the byte count to kfifo_in()/kfifo_out().\n\nThis is correct on 32-bit (pointer = 4 bytes), but on 64-bit only the\nlow 4 bytes of the 8-byte pointer are written into the FIFO. The reader\nthen reads back 4 bytes into an 8-byte local pointer variable, leaving\nthe upper 4 bytes uninitialized stack data. The first dereference of\nthe reconstructed pointer (fifo_buffer[1]) accesses an arbitrary kernel\naddress and generally results in an oops.\n\nUse sizeof(fifo_buffer) so the byte count matches pointer width on every\narchitecture.\n\nThe driver has no architecture restriction in Kconfig, so any 64-bit\nbuild with CONFIG_IEEE802154_CA8210_DEBUGFS=y is exposed. Issue has\nbeen latent since the driver was added in 2017 because it is most\ncommonly deployed on 32-bit MCUs.\n\nFound via a custom Coccinelle semantic patch hunting for short-byte\nkfifo I/O on byte-mode kfifos used to shuttle pointers.","Type":"Description","Title":"ieee802154: ca8210: fix pointer truncation in kfifo on 64-bit"}]}}}