{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2023-54195",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-12-30T12:06:44.498Z",
        "datePublished": "2025-12-30T12:09:02.123Z",
        "dateUpdated": "2026-05-11T19:57:18.436Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T19:57:18.436Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Fix timeout of a call that hasn't yet been granted a channel\n\nafs_make_call() calls rxrpc_kernel_begin_call() to begin a call (which may\nget stalled in the background waiting for a connection to become\navailable); it then calls rxrpc_kernel_set_max_life() to set the timeouts -\nbut that starts the call timer so the call timer might then expire before\nwe get a connection assigned - leading to the following oops if the call\nstalled:\n\n\tBUG: kernel NULL pointer dereference, address: 0000000000000000\n\t...\n\tCPU: 1 PID: 5111 Comm: krxrpcio/0 Not tainted 6.3.0-rc7-build3+ #701\n\tRIP: 0010:rxrpc_alloc_txbuf+0xc0/0x157\n\t...\n\tCall Trace:\n\t <TASK>\n\t rxrpc_send_ACK+0x50/0x13b\n\t rxrpc_input_call_event+0x16a/0x67d\n\t rxrpc_io_thread+0x1b6/0x45f\n\t ? _raw_spin_unlock_irqrestore+0x1f/0x35\n\t ? rxrpc_input_packet+0x519/0x519\n\t kthread+0xe7/0xef\n\t ? kthread_complete_and_exit+0x1b/0x1b\n\t ret_from_fork+0x22/0x30\n\nFix this by noting the timeouts in struct rxrpc_call when the call is\ncreated.  The timer will be started when the first packet is transmitted.\n\nIt shouldn't be possible to trigger this directly from userspace through\nAF_RXRPC as sendmsg() will return EBUSY if the call is in the\nwaiting-for-conn state if it dropped out of the wait due to a signal."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/afs/afs.h",
                        "fs/afs/internal.h",
                        "fs/afs/rxrpc.c",
                        "include/net/af_rxrpc.h",
                        "net/rxrpc/af_rxrpc.c",
                        "net/rxrpc/ar-internal.h",
                        "net/rxrpc/call_object.c",
                        "net/rxrpc/sendmsg.c"
                    ],
                    "versions": [
                        {
                            "version": "9d35d880e0e4a3ab32d8c12f9e4d76198aadd42d",
                            "lessThan": "92128a7170a220b5126d09a1c1954a3a8d46cef3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9d35d880e0e4a3ab32d8c12f9e4d76198aadd42d",
                            "lessThan": "72f4a9f3f447948cf86dffe1c4a4c8a429ab9666",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9d35d880e0e4a3ab32d8c12f9e4d76198aadd42d",
                            "lessThan": "db099c625b13a74d462521a46d98a8ce5b53af5d",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/afs/afs.h",
                        "fs/afs/internal.h",
                        "fs/afs/rxrpc.c",
                        "include/net/af_rxrpc.h",
                        "net/rxrpc/af_rxrpc.c",
                        "net/rxrpc/ar-internal.h",
                        "net/rxrpc/call_object.c",
                        "net/rxrpc/sendmsg.c"
                    ],
                    "versions": [
                        {
                            "version": "6.2",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.2",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.2.16",
                            "lessThanOrEqual": "6.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.3.3",
                            "lessThanOrEqual": "6.3.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.4",
                            "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": "6.2",
                                    "versionEndExcluding": "6.2.16"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.2",
                                    "versionEndExcluding": "6.3.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.2",
                                    "versionEndExcluding": "6.4"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/92128a7170a220b5126d09a1c1954a3a8d46cef3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/72f4a9f3f447948cf86dffe1c4a4c8a429ab9666"
                },
                {
                    "url": "https://git.kernel.org/stable/c/db099c625b13a74d462521a46d98a8ce5b53af5d"
                }
            ],
            "title": "rxrpc: Fix timeout of a call that hasn't yet been granted a channel",
            "x_generator": {
                "engine": "bippy-1.2.0"
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        }
    }
}