{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-53344", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-16T16:08:59.566Z", "datePublished": "2025-09-17T14:56:37.024Z", "dateUpdated": "2026-05-11T19:43:07.980Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:43:07.980Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: bcm: bcm_tx_setup(): fix KMSAN uninit-value in vfs_write\n\nSyzkaller reported the following issue:\n\n=====================================================\nBUG: KMSAN: uninit-value in aio_rw_done fs/aio.c:1520 [inline]\nBUG: KMSAN: uninit-value in aio_write+0x899/0x950 fs/aio.c:1600\n aio_rw_done fs/aio.c:1520 [inline]\n aio_write+0x899/0x950 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+0x11d/0x3b0 mm/slab_common.c:981\n kmalloc_array include/linux/slab.h:636 [inline]\n bcm_tx_setup+0x80e/0x29d0 net/can/bcm.c:930\n bcm_sendmsg+0x3a2/0xce0 net/can/bcm.c:1351\n sock_sendmsg_nosec net/socket.c:714 [inline]\n sock_sendmsg net/socket.c:734 [inline]\n sock_write_iter+0x495/0x5e0 net/socket.c:1108\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\nCPU: 1 PID: 5034 Comm: syz-executor350 Not tainted 6.2.0-rc6-syzkaller-80422-geda666ff2276 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023\n=====================================================\n\nWe can follow the call chain and find that 'bcm_tx_setup' function\ncalls 'memcpy_from_msg' to copy some content to the newly allocated\nframe of 'op->frames'. After that the 'len' field of copied structure\nbeing compared with some constant value (64 or 8). However, if\n'memcpy_from_msg' returns an error, we will compare some uninitialized\nmemory. This triggers 'uninit-value' issue.\n\nThis patch will add 'memcpy_from_msg' possible errors processing to\navoid uninit-value issue.\n\nTested via syzkaller" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/can/bcm.c" ], "versions": [ { "version": "6f3b911d5f29b98752e5da86a295210c0c4f4e14", "lessThan": "3fa0f1e0e31b1b73cdf59d4c36c7242e6ef821be", "status": "affected", "versionType": "git" }, { "version": "6f3b911d5f29b98752e5da86a295210c0c4f4e14", "lessThan": "618b15d09fed6126356101543451d49860db4388", "status": "affected", "versionType": "git" }, { "version": "6f3b911d5f29b98752e5da86a295210c0c4f4e14", "lessThan": "78bc7f0ab99458221224d3ab97199c0f8e6861f1", "status": "affected", "versionType": "git" }, { "version": "6f3b911d5f29b98752e5da86a295210c0c4f4e14", "lessThan": "ab2a55907823f0bca56b6d03ea05e4071ba8535f", "status": "affected", "versionType": "git" }, { "version": "6f3b911d5f29b98752e5da86a295210c0c4f4e14", "lessThan": "bf70e0eab64c625da84d9fdf4e84466b79418920", "status": "affected", "versionType": "git" }, { "version": "6f3b911d5f29b98752e5da86a295210c0c4f4e14", "lessThan": "c11dbc7705b3739974ac31a13f4ab81e61a5fb07", "status": "affected", "versionType": "git" }, { "version": "6f3b911d5f29b98752e5da86a295210c0c4f4e14", "lessThan": "2e6ad51c709fa794e0ce26003c9c9cd944e3383a", "status": "affected", "versionType": "git" }, { "version": "6f3b911d5f29b98752e5da86a295210c0c4f4e14", "lessThan": "2b4c99f7d9a57ecd644eda9b1fb0a1072414959f", "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/bcm.c" ], "versions": [ { "version": "4.8", "status": "affected" }, { "version": "0", "lessThan": "4.8", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.312", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.280", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.240", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.177", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.106", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.23", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.2.10", "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": "4.8", "versionEndExcluding": "4.14.312" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "4.19.280" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "5.4.240" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "5.10.177" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "5.15.106" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.1.23" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.2.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/3fa0f1e0e31b1b73cdf59d4c36c7242e6ef821be" }, { "url": "https://git.kernel.org/stable/c/618b15d09fed6126356101543451d49860db4388" }, { "url": "https://git.kernel.org/stable/c/78bc7f0ab99458221224d3ab97199c0f8e6861f1" }, { "url": "https://git.kernel.org/stable/c/ab2a55907823f0bca56b6d03ea05e4071ba8535f" }, { "url": "https://git.kernel.org/stable/c/bf70e0eab64c625da84d9fdf4e84466b79418920" }, { "url": "https://git.kernel.org/stable/c/c11dbc7705b3739974ac31a13f4ab81e61a5fb07" }, { "url": "https://git.kernel.org/stable/c/2e6ad51c709fa794e0ce26003c9c9cd944e3383a" }, { "url": "https://git.kernel.org/stable/c/2b4c99f7d9a57ecd644eda9b1fb0a1072414959f" } ], "title": "can: bcm: bcm_tx_setup(): fix KMSAN uninit-value in vfs_write", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2023-53344", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2026-01-14T18:39:34.603082Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-908", "description": "CWE-908 Use of Uninitialized Resource" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T18:43:02.515Z" } } ] } }