{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80982", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.811Z", "datePublished": "2026-09-11T19:42:42.243Z", "dateUpdated": "2026-09-11T19:42:42.243Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-11T19:42:42.243Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: fix use-after-free in smc_rx_pipe_buf_release()\n\nsmc_rx_splice() hands RMB pages to a pipe and takes a socket reference\nper entry so the smc_sock stays alive until the reader finishes. The\nconnection does not: a concurrent close runs smc_conn_free(), which\nreleases the receive buffer back to the link group pool.\n\nsmc_rx_pipe_buf_release() tests sk_state before taking the socket lock.\nThe state can change between the test and the lock, and\nsmc_rx_update_cons() then dereferences conn->rmb_desc and walks\nconn->lgr, which smc_conn_free() has already released. On the\nis_reg_err path smcr_buf_unuse() frees the descriptor outright, so\nthis is a use-after-free.\n\nTake the socket lock first and test conn->freed instead.\nsmc_conn_free() sets that flag before releasing anything, and every\ncaller holds the socket lock. The two paths exclude each other: either\nthe pipe release runs first with everything valid, or it sees the flag\nand skips the update."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/smc/smc_rx.c"], "versions": [{"version": "9014db202cb764b8e14c53e7bacc81f9a1a2ba7f", "lessThan": "6a644a7340df978785f3109d1e0726a982ce2c6f", "status": "affected", "versionType": "git"}, {"version": "9014db202cb764b8e14c53e7bacc81f9a1a2ba7f", "lessThan": "0761e49aa78c2f1362511054c6e9670653858837", "status": "affected", "versionType": "git"}, {"version": "9014db202cb764b8e14c53e7bacc81f9a1a2ba7f", "lessThan": "0926f59ca0f94120895b92180c636a48d0ed3a6d", "status": "affected", "versionType": "git"}, {"version": "9014db202cb764b8e14c53e7bacc81f9a1a2ba7f", "lessThan": "c924884743e948e25625b7fbf3ee2a9325a204a7", "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/smc/smc_rx.c"], "versions": [{"version": "4.18", "status": "affected"}, {"version": "0", "lessThan": "4.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-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": "4.18", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6a644a7340df978785f3109d1e0726a982ce2c6f"}, {"url": "https://git.kernel.org/stable/c/0761e49aa78c2f1362511054c6e9670653858837"}, {"url": "https://git.kernel.org/stable/c/0926f59ca0f94120895b92180c636a48d0ed3a6d"}, {"url": "https://git.kernel.org/stable/c/c924884743e948e25625b7fbf3ee2a9325a204a7"}], "title": "net/smc: fix use-after-free in smc_rx_pipe_buf_release()", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/smc/smc_rx.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "6a644a7340df978785f3109d1e0726a982ce2c6f", "status": "affected", "version": "9014db202cb764b8e14c53e7bacc81f9a1a2ba7f", "versionType": "git"}, {"lessThan": "0761e49aa78c2f1362511054c6e9670653858837", "status": "affected", "version": "9014db202cb764b8e14c53e7bacc81f9a1a2ba7f", "versionType": "git"}, {"lessThan": "0926f59ca0f94120895b92180c636a48d0ed3a6d", "status": "affected", "version": "9014db202cb764b8e14c53e7bacc81f9a1a2ba7f", "versionType": "git"}, {"lessThan": "c924884743e948e25625b7fbf3ee2a9325a204a7", "status": "affected", "version": "9014db202cb764b8e14c53e7bacc81f9a1a2ba7f", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/smc/smc_rx.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.18"}, {"lessThan": "4.18", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3-rc1", "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\nnet/smc: fix use-after-free in smc_rx_pipe_buf_release()\n\nsmc_rx_splice() hands RMB pages to a pipe and takes a socket reference\nper entry so the smc_sock stays alive until the reader finishes. The\nconnection does not: a concurrent close runs smc_conn_free(), which\nreleases the receive buffer back to the link group pool.\n\nsmc_rx_pipe_buf_release() tests sk_state before taking the socket lock.\nThe state can change between the test and the lock, and\nsmc_rx_update_cons() then dereferences conn->rmb_desc and walks\nconn->lgr, which smc_conn_free() has already released. On the\nis_reg_err path smcr_buf_unuse() frees the descriptor outright, so\nthis is a use-after-free.\n\nTake the socket lock first and test conn->freed instead.\nsmc_conn_free() sets that flag before releasing anything, and every\ncaller holds the socket lock. The two paths exclude each other: either\nthe pipe release runs first with everything valid, or it sees the flag\nand skips the update."}], "id": "CVE-2026-80982", "lastModified": "2026-09-11T20:19:04.667", "metrics": {}, "published": "2026-09-11T20:19:04.667", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0761e49aa78c2f1362511054c6e9670653858837"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0926f59ca0f94120895b92180c636a48d0ed3a6d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6a644a7340df978785f3109d1e0726a982ce2c6f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c924884743e948e25625b7fbf3ee2a9325a204a7"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: Use-after-free in SMC network protocol can lead to denial of service.", "id": "2532370", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532370"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's Shared Memory Communications (SMC) network protocol. A race condition occurs when a network connection is closed while the system is still processing its receive buffer pages. This can lead to a use-after-free vulnerability, where the system attempts to access memory that has already been released. An attacker could potentially exploit this flaw to cause a denial of service, leading to system instability or crashes."], "name": "CVE-2026-80982", "public_date": "2026-09-11T19:42:42Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-80982\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-80982\nhttps://git.kernel.org/stable/c/0761e49aa78c2f1362511054c6e9670653858837\nhttps://git.kernel.org/stable/c/0926f59ca0f94120895b92180c636a48d0ed3a6d\nhttps://git.kernel.org/stable/c/6a644a7340df978785f3109d1e0726a982ce2c6f\nhttps://git.kernel.org/stable/c/c924884743e948e25625b7fbf3ee2a9325a204a7"], "threat_severity": "Moderate"}

{}