{"id":"DEBIAN-CVE-2022-48726","details":"In the Linux kernel, the following vulnerability has been resolved:  RDMA/ucma: Protect mc during concurrent multicast leaves  Partially revert the commit mentioned in the Fixes line to make sure that allocation and erasing multicast struct are locked.    BUG: KASAN: use-after-free in ucma_cleanup_multicast drivers/infiniband/core/ucma.c:491 [inline]   BUG: KASAN: use-after-free in ucma_destroy_private_ctx+0x914/0xb70 drivers/infiniband/core/ucma.c:579   Read of size 8 at addr ffff88801bb74b00 by task syz-executor.1/25529   CPU: 0 PID: 25529 Comm: syz-executor.1 Not tainted 5.16.0-rc7-syzkaller #0   Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011   Call Trace:    __dump_stack lib/dump_stack.c:88 [inline]    dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106    print_address_description.constprop.0.cold+0x8d/0x320 mm/kasan/report.c:247    __kasan_report mm/kasan/report.c:433 [inline]    kasan_report.cold+0x83/0xdf mm/kasan/report.c:450    ucma_cleanup_multicast drivers/infiniband/core/ucma.c:491 [inline]    ucma_destroy_private_ctx+0x914/0xb70 drivers/infiniband/core/ucma.c:579    ucma_destroy_id+0x1e6/0x280 drivers/infiniband/core/ucma.c:614    ucma_write+0x25c/0x350 drivers/infiniband/core/ucma.c:1732    vfs_write+0x28e/0xae0 fs/read_write.c:588    ksys_write+0x1ee/0x250 fs/read_write.c:643    do_syscall_x64 arch/x86/entry/common.c:50 [inline]    do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80    entry_SYSCALL_64_after_hwframe+0x44/0xae  Currently the xarray search can touch a concurrently freeing mc as the xa_for_each() is not surrounded by any lock. Rather than hold the lock for a full scan hold it only for the effected items, which is usually an empty list.","modified":"2026-09-01T16:05:28.865394982Z","published":"2024-06-20T12:15:11.077Z","upstream":["CVE-2022-48726"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-48726"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.16.10-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-48726.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.16.10-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-48726.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.16.10-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-48726.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"}]}