{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53327", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.398Z", "datePublished": "2026-07-01T13:32:13.493Z", "dateUpdated": "2026-07-04T11:51:05.892Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-04T11:51:05.892Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndebugobjects: Do not fill_pool() if pi_blocked_on\n\nOn RT enabled kernels, fill_pool() ends up calling rtlock_lock(), which\nasserts if current::pi_blocked_on is set, because a task can obviously only\nblock on one lock as otherwise the priority inheritenace chain gets\ncorrupted.\n\nPrevent this by expanding the conditional to take current::pi_blocked_on\ninto account."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["lib/debugobjects.c"], "versions": [{"version": "4bedcc28469a24fe481a8a31b3584e6070457ddb", "lessThan": "8a680d54f1adf3e3aa815578684556716fda6f0c", "status": "affected", "versionType": "git"}, {"version": "4bedcc28469a24fe481a8a31b3584e6070457ddb", "lessThan": "a3383df76f0d7a597066df018409eb9e5e698064", "status": "affected", "versionType": "git"}, {"version": "4bedcc28469a24fe481a8a31b3584e6070457ddb", "lessThan": "3f6a3b24ab7b9d51f6f4778254bef0e5847beb55", "status": "affected", "versionType": "git"}, {"version": "4bedcc28469a24fe481a8a31b3584e6070457ddb", "lessThan": "3a408cae608d9c075dd3a9e5cfc03b3cb0726863", "status": "affected", "versionType": "git"}, {"version": "4bedcc28469a24fe481a8a31b3584e6070457ddb", "lessThan": "33bee10644f8fff3b1a0187ad5ad34513e5e8e72", "status": "affected", "versionType": "git"}, {"version": "4bedcc28469a24fe481a8a31b3584e6070457ddb", "lessThan": "5f41161059fd0f1bbf18c90f3180e38cc45a14eb", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["lib/debugobjects.c"], "versions": [{"version": "5.15", "status": "affected"}, {"version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.177", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.144", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.95", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.37", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.13", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "5.15", "versionEndExcluding": "6.1.177"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.6.144"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.12.95"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.18.37"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.0.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8a680d54f1adf3e3aa815578684556716fda6f0c"}, {"url": "https://git.kernel.org/stable/c/a3383df76f0d7a597066df018409eb9e5e698064"}, {"url": "https://git.kernel.org/stable/c/3f6a3b24ab7b9d51f6f4778254bef0e5847beb55"}, {"url": "https://git.kernel.org/stable/c/3a408cae608d9c075dd3a9e5cfc03b3cb0726863"}, {"url": "https://git.kernel.org/stable/c/33bee10644f8fff3b1a0187ad5ad34513e5e8e72"}, {"url": "https://git.kernel.org/stable/c/5f41161059fd0f1bbf18c90f3180e38cc45a14eb"}], "title": "debugobjects: Do not fill_pool() if pi_blocked_on", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"bugzilla": {"description": "kernel: debugobjects: Do not fill_pool() if pi_blocked_on", "id": "2495952", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2495952"}, "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-367", "details": ["A flaw was found in the Linux kernel's debugobjects functionality. On systems with Real-Time (RT) enabled kernels, the `fill_pool()` function can lead to a system assertion if a task is already blocked on a lock, causing corruption of the priority inheritance chain. This issue can result in a Denial of Service (DoS) due to the system asserting."], "name": "CVE-2026-53327", "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": "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": "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": "2026-07-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53327\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53327\nhttps://lore.kernel.org/linux-cve-announce/2026070141-CVE-2026-53327-9db6@gregkh/T"], "threat_severity": "Low"}