CVE-2023-53747

Ecosystem	Package	Version

Vulnerabilities

CVE-2023-53747

In the Linux kernel, the following vulnerability has been resolved: vc_screen: reload load of struct vc_data pointer in vcs_write() to avoid UAF After a call to console_unlock() in vcs_write() the vc_data struct can be freed by vc_port_destruct(). Because of that, the struct vc_data pointer must be reloaded in the while loop in vcs_write() after console_lock() to avoid a UAF when vcs_size() is called. Syzkaller reported a UAF in vcs_size(). BUG: KASAN: slab-use-after-free in vcs_size (drivers/tty/vt/vc_screen.c:215) Read of size 4 at addr ffff8880beab89a8 by task repro_vcs_size/4119 Call Trace: <TASK> __asan_report_load4_noabort (mm/kasan/report_generic.c:380) vcs_size (drivers/tty/vt/vc_screen.c:215) vcs_write (drivers/tty/vt/vc_screen.c:664) vfs_write (fs/read_write.c:582 fs/read_write.c:564) ... <TASK> Allocated by task 1213: kmalloc_trace (mm/slab_common.c:1064) vc_allocate (./include/linux/slab.h:559 ./include/linux/slab.h:680 drivers/tty/vt/vt.c:1078 drivers/tty/vt/vt.c:1058) con_install (drivers/tty/vt/vt.c:3334) tty_init_dev (drivers/tty/tty_io.c:1303 drivers/tty/tty_io.c:1415 drivers/tty/tty_io.c:1392) tty_open (drivers/tty/tty_io.c:2082 drivers/tty/tty_io.c:2128) chrdev_open (fs/char_dev.c:415) do_dentry_open (fs/open.c:921) vfs_open (fs/open.c:1052) ... Freed by task 4116: kfree (mm/slab_common.c:1016) vc_port_destruct (drivers/tty/vt/vt.c:1044) tty_port_destructor (drivers/tty/tty_port.c:296) tty_port_put (drivers/tty/tty_port.c:312) vt_disallocate_all (drivers/tty/vt/vt_ioctl.c:662 (discriminator 2)) vt_ioctl (drivers/tty/vt/vt_ioctl.c:903) tty_ioctl (drivers/tty/tty_io.c:2778) ... The buggy address belongs to the object at ffff8880beab8800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 424 bytes inside of freed 1024-byte region [ffff8880beab8800, ffff8880beab8c00) The buggy address belongs to the physical page: page:00000000afc77580 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xbeab8 head:00000000afc77580 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfffffc0010200(slab|head|node=0|zone=1|lastcpupid=0x1fffff) page_type: 0xffffffff() raw: 000fffffc0010200 ffff888100042dc0 ffffea000426de00 dead000000000002 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880beab8880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880beab8900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880beab8980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880beab8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880beab8a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== Disabling lock debugging due to kernel taint

Ecosystem	Package	Version

Vulnerabilities

CVE-2023-53747


rpm	kernel	3.10.0-1062.0.0.0.1.el7
rpm	kernel	3.10.0-1062.1.1.0.1.el7
rpm	kernel	3.10.0-1062.1.1.el7
rpm	kernel	3.10.0-1062.1.2.0.1.el7
rpm	kernel	3.10.0-1062.1.2.el7
rpm	kernel	3.10.0-1062.12.1.0.1.el7
rpm	kernel	3.10.0-1062.12.1.el7
rpm	kernel	3.10.0-1062.18.1.0.1.el7
rpm	kernel	3.10.0-1062.18.1.el7
rpm	kernel	3.10.0-1062.4.1.0.1.el7
rpm	kernel	3.10.0-1062.4.1.el7
rpm	kernel	3.10.0-1062.4.2.el7
rpm	kernel	3.10.0-1062.4.3.0.1.el7
rpm	kernel	3.10.0-1062.4.3.el7
rpm	kernel	3.10.0-1062.7.1.0.1.el7
rpm	kernel	3.10.0-1062.7.1.el7
rpm	kernel	3.10.0-1062.9.1.0.1.el7
rpm	kernel	3.10.0-1062.9.1.el7
rpm	kernel	3.10.0-1062.el7
rpm	kernel	3.10.0-1127.0.0.0.1.el7
rpm	kernel	3.10.0-1127.10.1.0.1.el7
rpm	kernel	3.10.0-1127.10.1.el7
rpm	kernel	3.10.0-1127.13.1.0.1.el7
rpm	kernel	3.10.0-1127.13.1.el7
rpm	kernel	3.10.0-1127.18.2.0.1.el7
rpm	kernel	3.10.0-1127.18.2.el7
rpm	kernel	3.10.0-1127.19.1.0.1.el7
rpm	kernel	3.10.0-1127.19.1.0.2.el7
rpm	kernel	3.10.0-1127.19.1.el7
rpm	kernel	3.10.0-1127.8.2.0.1.el7
rpm	kernel	3.10.0-1127.8.2.el7
rpm	kernel	3.10.0-1127.el7
rpm	kernel	3.10.0-1136.el7
rpm	kernel	3.10.0-1160.102.1.0.1.el7
rpm	kernel	3.10.0-1160.102.1.0.2.el7
rpm	kernel	3.10.0-1160.105.1.0.1.el7
rpm	kernel	3.10.0-1160.105.1.0.2.el7
rpm	kernel	3.10.0-1160.108.1.0.1.el7
rpm	kernel	3.10.0-1160.108.1.0.2.el7
rpm	kernel	3.10.0-1160.11.1.0.1.el7
rpm	kernel	3.10.0-1160.11.1.el7
rpm	kernel	3.10.0-1160.114.2.0.1.el7
rpm	kernel	3.10.0-1160.114.2.0.2.el7
rpm	kernel	3.10.0-1160.118.1.0.1.el7
rpm	kernel	3.10.0-1160.118.1.0.2.el7
rpm	kernel	3.10.0-1160.119.1.0.1.el7
rpm	kernel	3.10.0-1160.119.1.0.2.el7
rpm	kernel	3.10.0-1160.119.1.0.3.el7
rpm	kernel	3.10.0-1160.119.1.0.4.el7
rpm	kernel	3.10.0-1160.119.1.0.5.el7

Ecosystem	Package	Version

CVE-2023-53747 | Components Impacted | Sonatype Guide | Sonatype Guide

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CVE-2023-53747