CVE-2026-80639

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80639", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.777Z", "datePublished": "2026-08-28T06:48:52.045Z", "dateUpdated": "2026-08-28T06:48:52.045Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-28T06:48:52.045Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/test: Fix __fortify_panic\n\nFix a runtime assertion in setup_xor_mapping(). Fortify complains that it\nis potentially overflowing the xormaps array per __counted_by(nr_maps).\nQuiet the false positive by initializing @nr_maps earlier.\n\n memcpy: detected buffer overflow: 32 byte write of buffer size 0\n WARNING: lib/string_helpers.c:1036 at __fortify_report+0x4d/0xa0, CPU#8: modprobe/2728\n Call Trace:\n __fortify_panic+0xd/0xf\n setup_xor_mapping+0x6c/0xa0 [cxl_translate]\n\n[ dj: Fixed up @nr_entries to @nr_maps in commit log. ]"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["tools/testing/cxl/test/cxl_translate.c"], "versions": [{"version": "06377c54a133621d61fa76cdcea85077c5b958f4", "lessThan": "8c4f27a7f364eab514d2fa55c11f39d505122f1b", "status": "affected", "versionType": "git"}, {"version": "06377c54a133621d61fa76cdcea85077c5b958f4", "lessThan": "08326b92c7a414a73b5b308d1daf0e91e0134dfc", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["tools/testing/cxl/test/cxl_translate.c"], "versions": [{"version": "6.19", "status": "affected"}, {"version": "0", "lessThan": "6.19", "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": "6.19", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8c4f27a7f364eab514d2fa55c11f39d505122f1b"}, {"url": "https://git.kernel.org/stable/c/08326b92c7a414a73b5b308d1daf0e91e0134dfc"}], "title": "cxl/test: Fix __fortify_panic", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["tools/testing/cxl/test/cxl_translate.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "8c4f27a7f364eab514d2fa55c11f39d505122f1b", "status": "affected", "version": "06377c54a133621d61fa76cdcea85077c5b958f4", "versionType": "git"}, {"lessThan": "08326b92c7a414a73b5b308d1daf0e91e0134dfc", "status": "affected", "version": "06377c54a133621d61fa76cdcea85077c5b958f4", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["tools/testing/cxl/test/cxl_translate.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.19"}, {"lessThan": "6.19", "status": "unaffected", "version": "0", "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\ncxl/test: Fix __fortify_panic\n\nFix a runtime assertion in setup_xor_mapping(). Fortify complains that it\nis potentially overflowing the xormaps array per __counted_by(nr_maps).\nQuiet the false positive by initializing @nr_maps earlier.\n\n memcpy: detected buffer overflow: 32 byte write of buffer size 0\n WARNING: lib/string_helpers.c:1036 at __fortify_report+0x4d/0xa0, CPU#8: modprobe/2728\n Call Trace:\n __fortify_panic+0xd/0xf\n setup_xor_mapping+0x6c/0xa0 [cxl_translate]\n\n[ dj: Fixed up @nr_entries to @nr_maps in commit log. ]"}], "id": "CVE-2026-80639", "lastModified": "2026-08-28T08:16:48.813", "metrics": {}, "published": "2026-08-28T08:16:48.813", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/08326b92c7a414a73b5b308d1daf0e91e0134dfc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8c4f27a7f364eab514d2fa55c11f39d505122f1b"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: cxl/test: Fix __fortify_panic", "id": "2525497", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2525497"}, "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-805", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ncxl/test: Fix __fortify_panic\nFix a runtime assertion in setup_xor_mapping(). Fortify complains that it\nis potentially overflowing the xormaps array per __counted_by(nr_maps).\nQuiet the false positive by initializing @nr_maps earlier.\nmemcpy: detected buffer overflow: 32 byte write of buffer size 0\nWARNING: lib/string_helpers.c:1036 at __fortify_report+0x4d/0xa0, CPU#8: modprobe/2728\nCall Trace:\n__fortify_panic+0xd/0xf\nsetup_xor_mapping+0x6c/0xa0 [cxl_translate]\n[ dj: Fixed up @nr_entries to @nr_maps in commit log. ]", "A flaw was found in the Linux kernel's `cxl/test` module. A buffer overflow vulnerability, a type of memory corruption, exists within the `setup_xor_mapping()` function. This flaw could allow a local user to trigger a runtime assertion failure, potentially leading to system instability or a denial of service (DoS)."], "name": "CVE-2026-80639", "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": "2026-08-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-80639\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-80639\nhttps://lore.kernel.org/linux-cve-announce/2026082840-CVE-2026-80639-9559@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[06377c54a133621d61fa76cdcea85077c5b958f4,8c4f27a7f364eab514d2fa55c11f39d505122f1b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[06377c54a133621d61fa76cdcea85077c5b958f4,08326b92c7a414a73b5b308d1daf0e91e0134dfc)"}}], "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": "6.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.19)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0]"}}, {"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": "2026-08-28T11:00:11.223096+00:00", "updated": "2026-08-31T16:15:08.064147+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}