CVE-2026-80689

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pointer dereference crash.\n\nFix this by adding an explicit NULL check for tr at the beginning of\n__trace_mmiotrace_rw() and __trace_mmiotrace_map()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/trace/trace_mmiotrace.c"], "versions": [{"version": "f984b51e0779a6dd30feedc41404013ca54e5d05", "lessThan": "dc1b1a057b3bb901f83433700e604fe0ae67c5f2", "status": "affected", "versionType": "git"}, {"version": "f984b51e0779a6dd30feedc41404013ca54e5d05", "lessThan": "6aee2d478545c089dd5d055d3c9f0c7ea034fb80", "status": "affected", "versionType": "git"}, {"version": "f984b51e0779a6dd30feedc41404013ca54e5d05", "lessThan": "4e4ab09db7899d7f2d2293a18adf0fa200a27e73", "status": "affected", "versionType": "git"}, {"version": "f984b51e0779a6dd30feedc41404013ca54e5d05", "lessThan": "2df964d141270c40f07547b0c2e0a51e2573d46d", "status": "affected", "versionType": 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{"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-14T11:58:50.409Z"}}}, "cveMetadata": {"cveId": "CVE-2026-80689", "state": "PUBLISHED", "dateUpdated": "2026-11-06T17:05:53.098Z", "dateReserved": "2026-08-26T14:34:25.785Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-08-28T06:52:53.724Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["kernel/trace/trace_mmiotrace.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "dc1b1a057b3bb901f83433700e604fe0ae67c5f2", "status": "affected", "version": "f984b51e0779a6dd30feedc41404013ca54e5d05", "versionType": "git"}, {"lessThan": "6aee2d478545c089dd5d055d3c9f0c7ea034fb80", "status": "affected", "version": "f984b51e0779a6dd30feedc41404013ca54e5d05", "versionType": "git"}, {"lessThan": "4e4ab09db7899d7f2d2293a18adf0fa200a27e73", "status": "affected", "version": "f984b51e0779a6dd30feedc41404013ca54e5d05", "versionType": "git"}, {"lessThan": "2df964d141270c40f07547b0c2e0a51e2573d46d", "status": "affected", "version": "f984b51e0779a6dd30feedc41404013ca54e5d05", "versionType": "git"}, {"lessThan": "876014b4eeb927146430e7591cf959a7ceb8d64a", "status": "affected", "version": "f984b51e0779a6dd30feedc41404013ca54e5d05", "versionType": "git"}, {"lessThan": "a20a0010eb6485f60cd64e15ebc85a4bd388642e", "status": "affected", "version": "f984b51e0779a6dd30feedc41404013ca54e5d05", "versionType": "git"}, {"lessThan": "60234845142fddb27db89ebc00a65178421fb3a4", "status": "affected", "version": "f984b51e0779a6dd30feedc41404013ca54e5d05", "versionType": "git"}, {"lessThan": "12b80cdbc54cf615b4717a4e8180063408091ea2", "status": "affected", "version": "f984b51e0779a6dd30feedc41404013ca54e5d05", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["kernel/trace/trace_mmiotrace.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.27"}, {"lessThan": "2.6.27", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.270", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.221", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.103", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.44", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.8", "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\ntracing/mmiotrace: Add NULL check for mmio_trace_array in logging functions\n\nmmio_trace_rw() and mmio_trace_mapping() retrieve mmio_trace_array into\ntr and pass it to __trace_mmiotrace_rw() and __trace_mmiotrace_map().\nIf these functions are invoked while mmio_trace_array is NULL (e.g. before\ninitialization or after disabled), accessing tr->array_buffer.buffer will\nresult in a NULL pointer dereference crash.\n\nFix this by adding an explicit NULL check for tr at the beginning of\n__trace_mmiotrace_rw() and __trace_mmiotrace_map()."}], "id": "CVE-2026-80689", "lastModified": "2026-11-06T17:19:56.707", "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-80689", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T17:02:47.055483Z", "version": "2.0.3"}}]}, "published": "2026-08-28T08:16:54.390", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/12b80cdbc54cf615b4717a4e8180063408091ea2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2df964d141270c40f07547b0c2e0a51e2573d46d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4e4ab09db7899d7f2d2293a18adf0fa200a27e73"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/60234845142fddb27db89ebc00a65178421fb3a4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6aee2d478545c089dd5d055d3c9f0c7ea034fb80"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/876014b4eeb927146430e7591cf959a7ceb8d64a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a20a0010eb6485f60cd64e15ebc85a4bd388642e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dc1b1a057b3bb901f83433700e604fe0ae67c5f2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: tracing/mmiotrace: Add NULL check for mmio_trace_array in logging functions", "id": "2525375", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2525375"}, "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-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ntracing/mmiotrace: Add NULL check for mmio_trace_array in logging functions\nmmio_trace_rw() and mmio_trace_mapping() retrieve mmio_trace_array into\ntr and pass it to __trace_mmiotrace_rw() and __trace_mmiotrace_map().\nIf these functions are invoked while mmio_trace_array is NULL (e.g. before\ninitialization or after disabled), accessing tr->array_buffer.buffer will\nresult in a NULL pointer dereference crash.\nFix this by adding an explicit NULL check for tr at the beginning of\n__trace_mmiotrace_rw() and __trace_mmiotrace_map().", "A flaw was found in the Linux kernel's mmiotrace component. When the `mmio_trace_array` is not initialized or is disabled, invoking `mmio_trace_rw()` or `mmio_trace_mapping()` can lead to a NULL pointer dereference. This can cause a system crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-80689", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-80689\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-80689\nhttps://lore.kernel.org/linux-cve-announce/2026082803-CVE-2026-80689-f3d3@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f984b51e0779a6dd30feedc41404013ca54e5d05,876014b4eeb927146430e7591cf959a7ceb8d64a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f984b51e0779a6dd30feedc41404013ca54e5d05,a20a0010eb6485f60cd64e15ebc85a4bd388642e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f984b51e0779a6dd30feedc41404013ca54e5d05,60234845142fddb27db89ebc00a65178421fb3a4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f984b51e0779a6dd30feedc41404013ca54e5d05,12b80cdbc54cf615b4717a4e8180063408091ea2)"}}], "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": "semver", "value": "2.6.27"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.27)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.103,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.44,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.8,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "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": "2026-08-28T11:30:06.783260+00:00", "updated": "2026-08-31T14:30:09.006305+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}