{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2023-53344", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-53344", "idYear": 2023, "status": "PUBLISHED", "publishedAt": "2025-09-17T14:56:37.024Z", "updatedAt": "2026-05-11T19:43:07.980Z", "importedAt": "2026-10-24T01:57:03.413Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "can: bcm: bcm_tx_setup(): fix KMSAN uninit-value in vfs_write", "summary": "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": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "6f3b911d5f29b98752e5da86a295210c0c4f4e14", "status": "affected", "versionType": "git", "lessThan": "3fa0f1e0e31b1b73cdf59d4c36c7242e6ef821be" }, { "version": "6f3b911d5f29b98752e5da86a295210c0c4f4e14", "status": "affected", "versionType": "git", "lessThan": "618b15d09fed6126356101543451d49860db4388" }, { "version": "6f3b911d5f29b98752e5da86a295210c0c4f4e14", "status": "affected", "versionType": "git", "lessThan": "78bc7f0ab99458221224d3ab97199c0f8e6861f1" }, { "version": "6f3b911d5f29b98752e5da86a295210c0c4f4e14", "status": "affected", "versionType": "git", "lessThan": "ab2a55907823f0bca56b6d03ea05e4071ba8535f" }, { "version": "6f3b911d5f29b98752e5da86a295210c0c4f4e14", "status": "affected", "versionType": "git", "lessThan": "bf70e0eab64c625da84d9fdf4e84466b79418920" }, { "version": "6f3b911d5f29b98752e5da86a295210c0c4f4e14", "status": "affected", "versionType": "git", "lessThan": "c11dbc7705b3739974ac31a13f4ab81e61a5fb07" }, { "version": "6f3b911d5f29b98752e5da86a295210c0c4f4e14", "status": "affected", "versionType": "git", "lessThan": "2e6ad51c709fa794e0ce26003c9c9cd944e3383a" }, { "version": "6f3b911d5f29b98752e5da86a295210c0c4f4e14", "status": "affected", "versionType": "git", "lessThan": "2b4c99f7d9a57ecd644eda9b1fb0a1072414959f" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "4.8", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "4.8" }, { "version": "4.14.312", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.14.*" }, { "version": "4.19.280", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.240", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.177", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.106", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.23", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.2.10", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.2.*" }, { "version": "6.3", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }