{"id":"DEBIAN-CVE-2023-53578","details":"In the Linux kernel, the following vulnerability has been resolved:  net: qrtr: Fix an uninit variable access bug in qrtr_tx_resume()  Syzbot reported a bug as following:  ===================================================== BUG: KMSAN: uninit-value in qrtr_tx_resume+0x185/0x1f0 net/qrtr/af_qrtr.c:230  qrtr_tx_resume+0x185/0x1f0 net/qrtr/af_qrtr.c:230  qrtr_endpoint_post+0xf85/0x11b0 net/qrtr/af_qrtr.c:519  qrtr_tun_write_iter+0x270/0x400 net/qrtr/tun.c:108  call_write_iter include/linux/fs.h:2189 [inline]  aio_write+0x63a/0x950 fs/aio.c:1600  io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019  __do_sys_io_submit fs/aio.c:2078 [inline]  __se_sys_io_submit+0x293/0x770 fs/aio.c:2048  __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048  do_syscall_x64 arch/x86/entry/common.c:50 [inline]  do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80  entry_SYSCALL_64_after_hwframe+0x63/0xcd  Uninit was created at:  slab_post_alloc_hook mm/slab.h:766 [inline]  slab_alloc_node mm/slub.c:3452 [inline]  __kmem_cache_alloc_node+0x71f/0xce0 mm/slub.c:3491  __do_kmalloc_node mm/slab_common.c:967 [inline]  __kmalloc_node_track_caller+0x114/0x3b0 mm/slab_common.c:988  kmalloc_reserve net/core/skbuff.c:492 [inline]  __alloc_skb+0x3af/0x8f0 net/core/skbuff.c:565  __netdev_alloc_skb+0x120/0x7d0 net/core/skbuff.c:630  qrtr_endpoint_post+0xbd/0x11b0 net/qrtr/af_qrtr.c:446  qrtr_tun_write_iter+0x270/0x400 net/qrtr/tun.c:108  call_write_iter include/linux/fs.h:2189 [inline]  aio_write+0x63a/0x950 fs/aio.c:1600  io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019  __do_sys_io_submit fs/aio.c:2078 [inline]  __se_sys_io_submit+0x293/0x770 fs/aio.c:2048  __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048  do_syscall_x64 arch/x86/entry/common.c:50 [inline]  do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80  entry_SYSCALL_64_after_hwframe+0x63/0xcd  It is because that skb-\u003elen requires at least sizeof(struct qrtr_ctrl_pkt) in qrtr_tx_resume(). And skb-\u003elen equals to size in qrtr_endpoint_post(). But size is less than sizeof(struct qrtr_ctrl_pkt) when qrtr_cb-\u003etype equals to QRTR_TYPE_RESUME_TX in qrtr_endpoint_post() under the syzbot scenario. This triggers the uninit variable access bug.  Add size check when qrtr_cb-\u003etype equals to QRTR_TYPE_RESUME_TX in qrtr_endpoint_post() to fix the bug.","modified":"2026-09-15T09:03:01.757046616Z","published":"2025-10-04T16:15:53.483Z","upstream":["CVE-2023-53578"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-53578"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.25-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53578.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.25-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53578.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.25-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53578.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}