{"id":"CVE-2026-72048","state":"PUBLISHED","title":"ieee802154: ca8210: fix cas_ctl leak on spi_async failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nieee802154: ca8210: fix cas_ctl leak on spi_async failure\n\nca8210_spi_transfer() allocates cas_ctl with kzalloc_obj(GFP_ATOMIC)\nand relies entirely on the SPI completion callback\nca8210_spi_transfer_complete() to free it.\n\nThe spi_async() API only invokes the completion callback on successful\nsubmission.  On failure it returns a negative error code without ever\nqueuing the callback, which leaves cas_ctl and its embedded spi_message\nand spi_transfer orphaned.  Every kfree(cas_ctl) in the driver is\ninside the completion callback, so there is no other reclamation path.\n\nca8210_spi_transfer() is called from ca8210_spi_exchange(), the\ninterrupt handler ca8210_interrupt_handler(), and from the retry path\ninside the completion callback itself.  The exchange and interrupt\nhandler paths loop on -EBUSY, so under sustained SPI bus contention\nevery retry iteration leaks a fresh cas_ctl (~600 bytes per\noccurrence).\n\nFix it by freeing cas_ctl on the spi_async() error path.  While here,\ncorrect the misleading error string: the function calls spi_async(),\nnot spi_sync().","publishedAt":"2026-08-15T05:52:06.253Z","updatedAt":"2026-08-17T05:07:14.096Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ded845a781a578dfb0b5b2c138e5a067aa3b1242","status":"affected","lessThan":"460c5cd51e4d7d15b317f178f42cfcb666c0fe91","versionType":"git"},{"version":"ded845a781a578dfb0b5b2c138e5a067aa3b1242","status":"affected","lessThan":"b07aea90dbc6e188c74c100af64b77b9482ffc65","versionType":"git"},{"version":"ded845a781a578dfb0b5b2c138e5a067aa3b1242","status":"affected","lessThan":"fe90605b651573d30be8293ff5be40e3d7023117","versionType":"git"},{"version":"ded845a781a578dfb0b5b2c138e5a067aa3b1242","status":"affected","lessThan":"b9071dc7889bef42590e04fbf3e56cc65e1e5e6e","versionType":"git"},{"version":"ded845a781a578dfb0b5b2c138e5a067aa3b1242","status":"affected","lessThan":"d4a397fe803c2d157f6ebb068b802ef75fbf109e","versionType":"git"},{"version":"ded845a781a578dfb0b5b2c138e5a067aa3b1242","status":"affected","lessThan":"cb5cca1d2a908ddd5e357971de0f2009617b8d6a","versionType":"git"},{"version":"ded845a781a578dfb0b5b2c138e5a067aa3b1242","status":"affected","lessThan":"7e3630fbb6aabb844bbf35746dee0bf3894100c7","versionType":"git"},{"version":"ded845a781a578dfb0b5b2c138e5a067aa3b1242","status":"affected","lessThan":"e09390e439bd7cca30dd10893b1f64802961667a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ieee802154/ca8210.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.12","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ieee802154/ca8210.c"]}],"references":["https://git.kernel.org/stable/c/460c5cd51e4d7d15b317f178f42cfcb666c0fe91","https://git.kernel.org/stable/c/b07aea90dbc6e188c74c100af64b77b9482ffc65","https://git.kernel.org/stable/c/fe90605b651573d30be8293ff5be40e3d7023117","https://git.kernel.org/stable/c/b9071dc7889bef42590e04fbf3e56cc65e1e5e6e","https://git.kernel.org/stable/c/d4a397fe803c2d157f6ebb068b802ef75fbf109e","https://git.kernel.org/stable/c/cb5cca1d2a908ddd5e357971de0f2009617b8d6a","https://git.kernel.org/stable/c/7e3630fbb6aabb844bbf35746dee0bf3894100c7","https://git.kernel.org/stable/c/e09390e439bd7cca30dd10893b1f64802961667a"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/72xxx/CVE-2026-72048.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72048","state":"PUBLISHED","datePublished":"2026-08-15T05:52:06.253Z","dateUpdated":"2026-08-17T05:07:14.096Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-09T03:40:39.902Z"},"containers":{"cna":{"title":"ieee802154: ca8210: fix cas_ctl leak on spi_async failure","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nieee802154: ca8210: fix cas_ctl leak on spi_async failure\n\nca8210_spi_transfer() allocates cas_ctl with kzalloc_obj(GFP_ATOMIC)\nand relies entirely on the SPI completion callback\nca8210_spi_transfer_complete() to free it.\n\nThe spi_async() API only invokes the completion callback on successful\nsubmission.  On failure it returns a negative error code without ever\nqueuing the callback, which leaves cas_ctl and its embedded spi_message\nand spi_transfer orphaned.  Every kfree(cas_ctl) in the driver is\ninside the completion callback, so there is no other reclamation path.\n\nca8210_spi_transfer() is called from ca8210_spi_exchange(), the\ninterrupt handler ca8210_interrupt_handler(), and from the retry path\ninside the completion callback itself.  The exchange and interrupt\nhandler paths loop on -EBUSY, so under sustained SPI bus contention\nevery retry iteration leaks a fresh cas_ctl (~600 bytes per\noccurrence).\n\nFix it by freeing cas_ctl on the spi_async() error path.  While here,\ncorrect the misleading error string: the function calls spi_async(),\nnot spi_sync()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ded845a781a578dfb0b5b2c138e5a067aa3b1242","status":"affected","lessThan":"460c5cd51e4d7d15b317f178f42cfcb666c0fe91","versionType":"git"},{"version":"ded845a781a578dfb0b5b2c138e5a067aa3b1242","status":"affected","lessThan":"b07aea90dbc6e188c74c100af64b77b9482ffc65","versionType":"git"},{"version":"ded845a781a578dfb0b5b2c138e5a067aa3b1242","status":"affected","lessThan":"fe90605b651573d30be8293ff5be40e3d7023117","versionType":"git"},{"version":"ded845a781a578dfb0b5b2c138e5a067aa3b1242","status":"affected","lessThan":"b9071dc7889bef42590e04fbf3e56cc65e1e5e6e","versionType":"git"},{"version":"ded845a781a578dfb0b5b2c138e5a067aa3b1242","status":"affected","lessThan":"d4a397fe803c2d157f6ebb068b802ef75fbf109e","versionType":"git"},{"version":"ded845a781a578dfb0b5b2c138e5a067aa3b1242","status":"affected","lessThan":"cb5cca1d2a908ddd5e357971de0f2009617b8d6a","versionType":"git"},{"version":"ded845a781a578dfb0b5b2c138e5a067aa3b1242","status":"affected","lessThan":"7e3630fbb6aabb844bbf35746dee0bf3894100c7","versionType":"git"},{"version":"ded845a781a578dfb0b5b2c138e5a067aa3b1242","status":"affected","lessThan":"e09390e439bd7cca30dd10893b1f64802961667a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ieee802154/ca8210.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.12","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ieee802154/ca8210.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/460c5cd51e4d7d15b317f178f42cfcb666c0fe91"},{"url":"https://git.kernel.org/stable/c/b07aea90dbc6e188c74c100af64b77b9482ffc65"},{"url":"https://git.kernel.org/stable/c/fe90605b651573d30be8293ff5be40e3d7023117"},{"url":"https://git.kernel.org/stable/c/b9071dc7889bef42590e04fbf3e56cc65e1e5e6e"},{"url":"https://git.kernel.org/stable/c/d4a397fe803c2d157f6ebb068b802ef75fbf109e"},{"url":"https://git.kernel.org/stable/c/cb5cca1d2a908ddd5e357971de0f2009617b8d6a"},{"url":"https://git.kernel.org/stable/c/7e3630fbb6aabb844bbf35746dee0bf3894100c7"},{"url":"https://git.kernel.org/stable/c/e09390e439bd7cca30dd10893b1f64802961667a"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T05:07:14.096Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}