{"id":"DEBIAN-CVE-2022-48862","details":"In the Linux kernel, the following vulnerability has been resolved:  vhost: fix hung thread due to erroneous iotlb entries  In vhost_iotlb_add_range_ctx(), range size can overflow to 0 when start is 0 and last is ULONG_MAX. One instance where it can happen is when userspace sends an IOTLB message with iova=size=uaddr=0 (vhost_process_iotlb_msg). So, an entry with size = 0, start = 0, last = ULONG_MAX ends up in the iotlb. Next time a packet is sent, iotlb_access_ok() loops indefinitely due to that erroneous entry.  \tCall Trace: \t \u003cTASK\u003e \t iotlb_access_ok+0x21b/0x3e0 drivers/vhost/vhost.c:1340 \t vq_meta_prefetch+0xbc/0x280 drivers/vhost/vhost.c:1366 \t vhost_transport_do_send_pkt+0xe0/0xfd0 drivers/vhost/vsock.c:104 \t vhost_worker+0x23d/0x3d0 drivers/vhost/vhost.c:372 \t kthread+0x2e9/0x3a0 kernel/kthread.c:377 \t ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 \t \u003c/TASK\u003e  Reported by syzbot at: \thttps://syzkaller.appspot.com/bug?extid=0abd373e2e50d704db87  To fix this, do two things:  1. Return -EINVAL in vhost_chr_write_iter() when userspace asks to map    a range with size 0. 2. Fix vhost_iotlb_add_range_ctx() to handle the range [0, ULONG_MAX]    by splitting it into two entries.","modified":"2026-09-01T16:05:29.201290981Z","published":"2024-07-16T13:15:13.100Z","upstream":["CVE-2022-48862"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-48862"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.16.18-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-48862.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.16.18-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-48862.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.16.18-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-48862.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:N/I:N/A:H"}]}