CVE-2025-68376

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-68376", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-16T14:48:05.310Z", "datePublished": "2025-12-24T10:33:05.503Z", "dateUpdated": "2026-10-21T12:38:21.502Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:38:21.502Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: ETR: Fix ETR buffer use-after-free issue\n\nWhen ETR is enabled as CS_MODE_SYSFS, if the buffer size is changed\nand enabled again, currently sysfs_buf will point to the newly\nallocated memory(buf_new) and free the old memory(buf_old). But the\netr_buf that is being used by the ETR remains pointed to buf_old, not\nupdated to buf_new. In this case, it will result in a memory\nuse-after-free issue.\n\nFix this by checking ETR's mode before updating and releasing buf_old,\nif the mode is CS_MODE_SYSFS, then skip updating and releasing it."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/hwtracing/coresight/coresight-tmc-etr.c"], "versions": [{"version": "bd2767ec3df2775bc336f441f9068a989ccb919d", "lessThan": "5d5d130835b417c7bfd6c942f0149e34397d4463", "status": "affected", "versionType": "git"}, {"version": "bd2767ec3df2775bc336f441f9068a989ccb919d", "lessThan": "4e83434247ff8005a0b9a1ee997864abf8f259ec", "status": "affected", "versionType": "git"}, {"version": "bd2767ec3df2775bc336f441f9068a989ccb919d", "lessThan": "70acbc9c77686b7a521af6d7a543dcd9c324cf07", "status": "affected", "versionType": "git"}, {"version": "bd2767ec3df2775bc336f441f9068a989ccb919d", "lessThan": "cda077a19f5c8d6ec61e5b97deca203d95e3a422", "status": "affected", "versionType": "git"}, {"version": "bd2767ec3df2775bc336f441f9068a989ccb919d", "lessThan": "35501ac3c7d40a7bb9568c2f89d6b56beaf9bed3", "status": "affected", "versionType": "git"}, {"version": "fdd3ceb0001da6768bede9779a0190a42e65c404", "status": "affected", "versionType": "git"}, {"version": "6.5.8", "lessThan": "6.6", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/hwtracing/coresight/coresight-tmc-etr.c"], "versions": [{"version": "6.6", "status": "affected"}, {"version": "0", "lessThan": "6.6", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.114", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17.13", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.2", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19", "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": "6.6", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.12.114"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.17.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.18.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.19"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5.8"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/5d5d130835b417c7bfd6c942f0149e34397d4463"}, {"url": "https://git.kernel.org/stable/c/4e83434247ff8005a0b9a1ee997864abf8f259ec"}, {"url": "https://git.kernel.org/stable/c/70acbc9c77686b7a521af6d7a543dcd9c324cf07"}, {"url": "https://git.kernel.org/stable/c/cda077a19f5c8d6ec61e5b97deca203d95e3a422"}, {"url": "https://git.kernel.org/stable/c/35501ac3c7d40a7bb9568c2f89d6b56beaf9bed3"}], "title": "coresight: ETR: Fix ETR buffer use-after-free issue", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/hwtracing/coresight/coresight-tmc-etr.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "5d5d130835b417c7bfd6c942f0149e34397d4463", "status": "affected", "version": "bd2767ec3df2775bc336f441f9068a989ccb919d", "versionType": "git"}, {"lessThan": "4e83434247ff8005a0b9a1ee997864abf8f259ec", "status": "affected", "version": "bd2767ec3df2775bc336f441f9068a989ccb919d", "versionType": "git"}, {"lessThan": "70acbc9c77686b7a521af6d7a543dcd9c324cf07", "status": "affected", "version": "bd2767ec3df2775bc336f441f9068a989ccb919d", "versionType": "git"}, {"lessThan": "cda077a19f5c8d6ec61e5b97deca203d95e3a422", "status": "affected", "version": "bd2767ec3df2775bc336f441f9068a989ccb919d", "versionType": "git"}, {"lessThan": "35501ac3c7d40a7bb9568c2f89d6b56beaf9bed3", "status": "affected", "version": "bd2767ec3df2775bc336f441f9068a989ccb919d", "versionType": "git"}, {"status": "affected", "version": "fdd3ceb0001da6768bede9779a0190a42e65c404", "versionType": "git"}, {"lessThan": "6.6", "status": "affected", "version": "6.5.8", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/hwtracing/coresight/coresight-tmc-etr.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.6"}, {"lessThan": "6.6", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.114", "versionType": "semver"}, {"lessThanOrEqual": "6.17.*", "status": "unaffected", "version": "6.17.13", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.2", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.19", "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\ncoresight: ETR: Fix ETR buffer use-after-free issue\n\nWhen ETR is enabled as CS_MODE_SYSFS, if the buffer size is changed\nand enabled again, currently sysfs_buf will point to the newly\nallocated memory(buf_new) and free the old memory(buf_old). But the\netr_buf that is being used by the ETR remains pointed to buf_old, not\nupdated to buf_new. In this case, it will result in a memory\nuse-after-free issue.\n\nFix this by checking ETR's mode before updating and releasing buf_old,\nif the mode is CS_MODE_SYSFS, then skip updating and releasing it."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ncoresight: ETR: Solucionar el problema de uso despu\u00e9s de liberaci\u00f3n del b\u00fafer ETR\n\nCuando ETR est\u00e1 habilitado como CS_MODE_SYSFS, si el tama\u00f1o del b\u00fafer se cambia y se habilita de nuevo, actualmente sysfs_buf apuntar\u00e1 a la memoria reci\u00e9n asignada (buf_new) y liberar\u00e1 la memoria antigua (buf_old). Pero el etr_buf que est\u00e1 siendo utilizado por el ETR permanece apuntando a buf_old, no actualizado a buf_new. En este caso, resultar\u00e1 en un problema de uso despu\u00e9s de liberaci\u00f3n de memoria.\n\nSolucione esto verificando el modo de ETR antes de actualizar y liberar buf_old; si el modo es CS_MODE_SYSFS, entonces omita su actualizaci\u00f3n y liberaci\u00f3n."}], "id": "CVE-2025-68376", "lastModified": "2026-10-21T13:18:23.520", "metrics": {}, "published": "2025-12-24T11:16:01.193", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/35501ac3c7d40a7bb9568c2f89d6b56beaf9bed3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4e83434247ff8005a0b9a1ee997864abf8f259ec"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5d5d130835b417c7bfd6c942f0149e34397d4463"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/70acbc9c77686b7a521af6d7a543dcd9c324cf07"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cda077a19f5c8d6ec61e5b97deca203d95e3a422"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: coresight: ETR: Fix ETR buffer use-after-free issue", "id": "2424870", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2424870"}, "csaw": false, "details": ["In the Linux kernel, the following vulnerability has been resolved:\ncoresight: ETR: Fix ETR buffer use-after-free issue\nWhen ETR is enabled as CS_MODE_SYSFS, if the buffer size is changed\nand enabled again, currently sysfs_buf will point to the newly\nallocated memory(buf_new) and free the old memory(buf_old). But the\netr_buf that is being used by the ETR remains pointed to buf_old, not\nupdated to buf_new. In this case, it will result in a memory\nuse-after-free issue.\nFix this by checking ETR's mode before updating and releasing buf_old,\nif the mode is CS_MODE_SYSFS, then skip updating and releasing it."], "name": "CVE-2025-68376", "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": "2025-12-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-68376\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-68376\nhttps://lore.kernel.org/linux-cve-announce/2025122402-CVE-2025-68376-a954@gregkh/T"]}

{}