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This leaves a window\nwhere raw_rcv() may still be running in an RCU read-side critical section\nafter raw_release() frees ro->uniq, leading to a use-after-free of the\npercpu uniq storage.\n\nMove free_percpu(ro->uniq) out of raw_release() and into a raw-specific\nsocket destructor. can_rx_unregister() takes an extra reference to the\nsocket and only drops it from the RCU callback, so freeing uniq from\nsk_destruct ensures the percpu area is not released until the relevant\ncallbacks have drained.\n\n[mkl: applied manually]"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/can/raw.c"], "versions": [{"version": "514ac99c64b22d83b52dfee3b8becaa69a92bc4a", "lessThan": "5e9cfffad898bbeaafd0ea608a6d267362f050fc", "status": "affected", "versionType": "git"}, {"version": "514ac99c64b22d83b52dfee3b8becaa69a92bc4a", "lessThan": "572f0bf536ebc14f6e7da3d21a85cf076de8358e", "status": "affected", "versionType": "git"}, {"version": "514ac99c64b22d83b52dfee3b8becaa69a92bc4a", "lessThan": "1a0f2de81f7fbdc538fc72d7d74609b79bc83cc0", "status": "affected", "versionType": "git"}, {"version": "514ac99c64b22d83b52dfee3b8becaa69a92bc4a", "lessThan": "7201a531b9a5ed892bfda5ded9194ef622de8ffa", "status": "affected", "versionType": "git"}, {"version": "514ac99c64b22d83b52dfee3b8becaa69a92bc4a", "lessThan": "34c1741254ff972e8375faf176678a248826fe3a", "status": "affected", "versionType": "git"}, {"version": "514ac99c64b22d83b52dfee3b8becaa69a92bc4a", "lessThan": "a535a9217ca3f2fccedaafb2fddb4c48f27d36dc", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/can/raw.c"], "versions": [{"version": "4.1", "status": "affected"}, {"version": "0", "lessThan": "4.1", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.136", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.83", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.24", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.14", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.1", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1-rc1", "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": "4.1", "versionEndExcluding": "6.6.136"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "6.12.83"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "6.18.24"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "6.19.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "7.0.1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "7.1-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/5e9cfffad898bbeaafd0ea608a6d267362f050fc"}, {"url": "https://git.kernel.org/stable/c/572f0bf536ebc14f6e7da3d21a85cf076de8358e"}, {"url": "https://git.kernel.org/stable/c/1a0f2de81f7fbdc538fc72d7d74609b79bc83cc0"}, {"url": "https://git.kernel.org/stable/c/7201a531b9a5ed892bfda5ded9194ef622de8ffa"}, {"url": "https://git.kernel.org/stable/c/34c1741254ff972e8375faf176678a248826fe3a"}, {"url": "https://git.kernel.org/stable/c/a535a9217ca3f2fccedaafb2fddb4c48f27d36dc"}], "title": "can: raw: fix ro->uniq use-after-free in raw_rcv()", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"bugzilla": {"description": "kernel: can: raw: fix ro->uniq use-after-free in raw_rcv()", "id": "2461107", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2461107"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-366", "details": ["A flaw was found in the Linux kernel's Controller Area Network (CAN) raw socket implementation. A use-after-free vulnerability can occur due to a timing window during the unregistration of CAN receive filters, allowing a freed memory region to be accessed. This could lead to system instability or a denial of service (DoS)."], "name": "CVE-2026-31532", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Under investigation", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-04-23T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31532\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31532\nhttps://lore.kernel.org/linux-cve-announce/2026042349-CVE-2026-31532-a820@gregkh/T"], "threat_severity": "Important"}

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