{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-53578", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-10-04T15:14:15.926Z", "datePublished": "2025-10-04T15:17:17.350Z", "dateUpdated": "2026-05-11T19:47:46.809Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:47:46.809Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qrtr: Fix an uninit variable access bug in qrtr_tx_resume()\n\nSyzbot reported a bug as following:\n\n=====================================================\nBUG: KMSAN: uninit-value in qrtr_tx_resume+0x185/0x1f0 net/qrtr/af_qrtr.c:230\n qrtr_tx_resume+0x185/0x1f0 net/qrtr/af_qrtr.c:230\n qrtr_endpoint_post+0xf85/0x11b0 net/qrtr/af_qrtr.c:519\n qrtr_tun_write_iter+0x270/0x400 net/qrtr/tun.c:108\n call_write_iter include/linux/fs.h:2189 [inline]\n aio_write+0x63a/0x950 fs/aio.c:1600\n io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019\n __do_sys_io_submit fs/aio.c:2078 [inline]\n __se_sys_io_submit+0x293/0x770 fs/aio.c:2048\n __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nUninit was created at:\n slab_post_alloc_hook mm/slab.h:766 [inline]\n slab_alloc_node mm/slub.c:3452 [inline]\n __kmem_cache_alloc_node+0x71f/0xce0 mm/slub.c:3491\n __do_kmalloc_node mm/slab_common.c:967 [inline]\n __kmalloc_node_track_caller+0x114/0x3b0 mm/slab_common.c:988\n kmalloc_reserve net/core/skbuff.c:492 [inline]\n __alloc_skb+0x3af/0x8f0 net/core/skbuff.c:565\n __netdev_alloc_skb+0x120/0x7d0 net/core/skbuff.c:630\n qrtr_endpoint_post+0xbd/0x11b0 net/qrtr/af_qrtr.c:446\n qrtr_tun_write_iter+0x270/0x400 net/qrtr/tun.c:108\n call_write_iter include/linux/fs.h:2189 [inline]\n aio_write+0x63a/0x950 fs/aio.c:1600\n io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019\n __do_sys_io_submit fs/aio.c:2078 [inline]\n __se_sys_io_submit+0x293/0x770 fs/aio.c:2048\n __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nIt is because that skb->len requires at least sizeof(struct qrtr_ctrl_pkt)\nin qrtr_tx_resume(). And skb->len equals to size in qrtr_endpoint_post().\nBut size is less than sizeof(struct qrtr_ctrl_pkt) when qrtr_cb->type\nequals to QRTR_TYPE_RESUME_TX in qrtr_endpoint_post() under the syzbot\nscenario. This triggers the uninit variable access bug.\n\nAdd size check when qrtr_cb->type equals to QRTR_TYPE_RESUME_TX in\nqrtr_endpoint_post() to fix the bug." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/qrtr/af_qrtr.c" ], "versions": [ { "version": "5fdeb0d372ab33b4175043a2a4a1730239a217f1", "lessThan": "3814d211ff13ee35f2d9437439a6c7df58524137", "status": "affected", "versionType": "git" }, { "version": "5fdeb0d372ab33b4175043a2a4a1730239a217f1", "lessThan": "c6a796ee5a639ffb83c6e5469408cc2ec16cac6a", "status": "affected", "versionType": "git" }, { "version": "5fdeb0d372ab33b4175043a2a4a1730239a217f1", "lessThan": "bef57c227b52c2bde00fad33556175d36d12cfa0", "status": "affected", "versionType": "git" }, { "version": "5fdeb0d372ab33b4175043a2a4a1730239a217f1", "lessThan": "8c9ce34a6ff2c544f96ce0b088e8fd3c1b9698c4", "status": "affected", "versionType": "git" }, { "version": "5fdeb0d372ab33b4175043a2a4a1730239a217f1", "lessThan": "6417070918de3bcdbe0646e7256dae58fd8083ba", "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/qrtr/af_qrtr.c" ], "versions": [ { "version": "5.6", "status": "affected" }, { "version": "0", "lessThan": "5.6", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.178", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.108", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.25", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.2.12", "lessThanOrEqual": "6.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.3", "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": "5.6", "versionEndExcluding": "5.10.178" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "5.15.108" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.1.25" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.2.12" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/3814d211ff13ee35f2d9437439a6c7df58524137" }, { "url": "https://git.kernel.org/stable/c/c6a796ee5a639ffb83c6e5469408cc2ec16cac6a" }, { "url": "https://git.kernel.org/stable/c/bef57c227b52c2bde00fad33556175d36d12cfa0" }, { "url": "https://git.kernel.org/stable/c/8c9ce34a6ff2c544f96ce0b088e8fd3c1b9698c4" }, { "url": "https://git.kernel.org/stable/c/6417070918de3bcdbe0646e7256dae58fd8083ba" } ], "title": "net: qrtr: Fix an uninit variable access bug in qrtr_tx_resume()", "x_generator": { "engine": "bippy-1.2.0" } } } }