CVE-2026-72047

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72047", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.902Z", "datePublished": "2026-08-15T05:52:05.510Z", "dateUpdated": "2026-08-17T05:07:12.985Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:07:12.985Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ieee802154/ca8210.c"], "versions": [{"version": "ded845a781a578dfb0b5b2c138e5a067aa3b1242", "lessThan": "2c1664ccfae653979b38788211240b5a1ee317ed", "status": "affected", "versionType": "git"}, {"version": "ded845a781a578dfb0b5b2c138e5a067aa3b1242", "lessThan": "093aacb0c56d5c693e3169a0224062e77c3fd0c0", "status": "affected", "versionType": "git"}, {"version": "ded845a781a578dfb0b5b2c138e5a067aa3b1242", "lessThan": "87dab14a4f68895d6f4d798e6ee3556cd64e8c72", "status": "affected", "versionType": "git"}, {"version": "ded845a781a578dfb0b5b2c138e5a067aa3b1242", "lessThan": "1fe2643d0b24ca3cdd61a31a45c2d3233dc6cbfe", "status": "affected", "versionType": "git"}, {"version": "ded845a781a578dfb0b5b2c138e5a067aa3b1242", "lessThan": "65dc342274a01616f5c17105f7360a3b4bfd7a3d", "status": "affected", "versionType": "git"}, {"version": "ded845a781a578dfb0b5b2c138e5a067aa3b1242", "lessThan": "2059c28bd725beded01277cdf1f67be33e714323", "status": "affected", "versionType": "git"}, {"version": "ded845a781a578dfb0b5b2c138e5a067aa3b1242", "lessThan": "d8ce67fa6a5e6929f5414e933ff9665176c2bce6", "status": "affected", "versionType": "git"}, {"version": "ded845a781a578dfb0b5b2c138e5a067aa3b1242", "lessThan": "6d7f7bcf225b2d566176bf6229dbd1252940cb3c", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ieee802154/ca8210.c"], "versions": [{"version": "4.12", "status": "affected"}, {"version": "0", "lessThan": "4.12", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "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"}]}]}], "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"}}}}

{}

{"affected": [{"affectedData": [{"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", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-72047", "lastModified": "2026-08-17T06:18:02.747", "metrics": {}, "published": "2026-08-15T06:21:13.933", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/093aacb0c56d5c693e3169a0224062e77c3fd0c0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1fe2643d0b24ca3cdd61a31a45c2d3233dc6cbfe"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2059c28bd725beded01277cdf1f67be33e714323"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2c1664ccfae653979b38788211240b5a1ee317ed"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/65dc342274a01616f5c17105f7360a3b4bfd7a3d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6d7f7bcf225b2d566176bf6229dbd1252940cb3c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/87dab14a4f68895d6f4d798e6ee3556cd64e8c72"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d8ce67fa6a5e6929f5414e933ff9665176c2bce6"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: ieee802154: ca8210: fix pointer truncation in kfifo on 64-bit", "id": "2516590", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516590"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-824", "details": ["A flaw was found in the Linux kernel's `ieee802154 ca8210` driver. On 64-bit systems, a pointer truncation vulnerability occurs during internal buffer operations. This issue causes only a partial pointer to be written, leading to an uninitialized upper portion when read back. Consequently, the system may attempt to access an arbitrary kernel memory address, which typically results in a kernel crash (Denial of Service). A local attacker might be able to leverage this to achieve privilege escalation."], "name": "CVE-2026-72047", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72047\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72047\nhttps://lore.kernel.org/linux-cve-announce/2026081514-CVE-2026-72047-64f9@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ded845a781a578dfb0b5b2c138e5a067aa3b1242,2c1664ccfae653979b38788211240b5a1ee317ed)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ded845a781a578dfb0b5b2c138e5a067aa3b1242,093aacb0c56d5c693e3169a0224062e77c3fd0c0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ded845a781a578dfb0b5b2c138e5a067aa3b1242,87dab14a4f68895d6f4d798e6ee3556cd64e8c72)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ded845a781a578dfb0b5b2c138e5a067aa3b1242,1fe2643d0b24ca3cdd61a31a45c2d3233dc6cbfe)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ded845a781a578dfb0b5b2c138e5a067aa3b1242,65dc342274a01616f5c17105f7360a3b4bfd7a3d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ded845a781a578dfb0b5b2c138e5a067aa3b1242,2059c28bd725beded01277cdf1f67be33e714323)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ded845a781a578dfb0b5b2c138e5a067aa3b1242,d8ce67fa6a5e6929f5414e933ff9665176c2bce6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ded845a781a578dfb0b5b2c138e5a067aa3b1242,6d7f7bcf225b2d566176bf6229dbd1252940cb3c)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[4.12,4.12]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,4.12)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.261,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.212,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T10:00:06.356503+00:00", "updated": "2026-08-18T02:15:04.926008+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-665", "CWE-824"]}