{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-23372", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:46.003Z", "datePublished": "2026-03-25T10:27:53.308Z", "dateUpdated": "2026-08-05T12:21:18.928Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:21:18.928Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: rawsock: cancel tx_work before socket teardown\n\nIn rawsock_release(), cancel any pending tx_work and purge the write\nqueue before orphaning the socket. rawsock_tx_work runs on the system\nworkqueue and calls nfc_data_exchange which dereferences the NCI\ndevice. Without synchronization, tx_work can race with socket and\ndevice teardown when a process is killed (e.g. by SIGKILL), leading\nto use-after-free or leaked references.\n\nSet SEND_SHUTDOWN first so that if tx_work is already running it will\nsee the flag and skip transmitting, then use cancel_work_sync to wait\nfor any in-progress execution to finish, and finally purge any\nremaining queued skbs." } ], "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" }, "scenarios": [ { "lang": "en", "value": "AV:L - The attacker needs local access to create an AF_NFC socket and perform socket operations (connect, sendmsg, close). NFC is the affected subsystem but the exploit entry is through local syscalls.\nAC:L - The attacker controls both sides of the race — they schedule tx_work via sendmsg() then immediately close the socket. The race is reliably triggerable by the attacker.\nPR:L - Creating a SOCK_SEQPACKET NFC socket requires no capabilities (only SOCK_RAW requires CAP_NET_RAW). Any unprivileged local user in the init network namespace can create and use these sockets.\nUI:N - No user interaction needed. The attacker opens, connects, sends, and closes the NFC socket entirely on their own.\nS:U - Standard kernel use-after-free within the same security authority (kernel privilege escalation). No cross-boundary escape such as VM or sandbox escape.\nC:H - UAF on a struct containing function pointers (nfc_dev with dev->ops) allows an attacker to read arbitrary kernel memory via heap spray techniques placing controlled data in the freed allocation.\nI:H - The UAF dereferences dev->ops->im_transceive, a function pointer on freed memory. Via heap spraying, the attacker can hijack this function pointer to achieve arbitrary code execution in kernel context.\nA:H - Use-after-free on kernel objects causes kernel crash/oops when the freed memory is dereferenced, leading to denial of service." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/nfc/rawsock.c" ], "versions": [ { "version": "23b7869c0fd08d73c9f83a2db88a13312d6198bb", "lessThan": "9b2d23cd09e1cb56bdf0e4d5614703094159f16c", "status": "affected", "versionType": "git" }, { "version": "23b7869c0fd08d73c9f83a2db88a13312d6198bb", "lessThan": "cdeed45ce8c92defd057f7d67ee9a69374d8fa16", "status": "affected", "versionType": "git" }, { "version": "23b7869c0fd08d73c9f83a2db88a13312d6198bb", "lessThan": "3ae592ed91bb4b6b51df256b51045c13d2656049", "status": "affected", "versionType": "git" }, { "version": "23b7869c0fd08d73c9f83a2db88a13312d6198bb", "lessThan": "722a28b635ec281bb08a23885223526d8e7d6526", "status": "affected", "versionType": "git" }, { "version": "23b7869c0fd08d73c9f83a2db88a13312d6198bb", "lessThan": "78141b8832e16d80d09cbefb4258612db0777a24", "status": "affected", "versionType": "git" }, { "version": "23b7869c0fd08d73c9f83a2db88a13312d6198bb", "lessThan": "edc988613def90c5b558e025b1b423f48007be06", "status": "affected", "versionType": "git" }, { "version": "23b7869c0fd08d73c9f83a2db88a13312d6198bb", "lessThan": "da4515fc8263c5933ed605e396af91079806dc45", "status": "affected", "versionType": "git" }, { "version": "23b7869c0fd08d73c9f83a2db88a13312d6198bb", "lessThan": "d793458c45df2aed498d7f74145eab7ee22d25aa", "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/nfc/rawsock.c" ], "versions": [ { "version": "3.1", "status": "affected" }, { "version": "0", "lessThan": "3.1", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.253", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.167", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.130", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.77", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.17", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19.7", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0", "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": "3.1", "versionEndExcluding": "5.10.253" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "5.15.203" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "6.1.167" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "6.6.130" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "6.12.77" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "6.18.17" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "6.19.7" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "7.0" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/9b2d23cd09e1cb56bdf0e4d5614703094159f16c" }, { "url": "https://git.kernel.org/stable/c/cdeed45ce8c92defd057f7d67ee9a69374d8fa16" }, { "url": "https://git.kernel.org/stable/c/3ae592ed91bb4b6b51df256b51045c13d2656049" }, { "url": "https://git.kernel.org/stable/c/722a28b635ec281bb08a23885223526d8e7d6526" }, { "url": "https://git.kernel.org/stable/c/78141b8832e16d80d09cbefb4258612db0777a24" }, { "url": "https://git.kernel.org/stable/c/edc988613def90c5b558e025b1b423f48007be06" }, { "url": "https://git.kernel.org/stable/c/da4515fc8263c5933ed605e396af91079806dc45" }, { "url": "https://git.kernel.org/stable/c/d793458c45df2aed498d7f74145eab7ee22d25aa" } ], "title": "nfc: rawsock: cancel tx_work before socket teardown", "x_generator": { "engine": "bippy-1.2.0" } } } }