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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2023-54198

tty: fix out-of-bounds access in tty_driver_lookup_tty()

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: tty: fix out-of-bounds access in tty_driver_lookup_tty() When specifying an invalid console= device like console=tty3270, tty_driver_lookup_tty() returns the tty struct without checking whether index is a valid number. To reproduce: qemu-system-x86_64 -enable-kvm -nographic -serial mon:stdio \ -kernel ../linux-build-x86/arch/x86/boot/bzImage \ -append "console=ttyS0 console=tty3270" This crashes with: [ 0.770599] BUG: kernel NULL pointer dereference, address: 00000000000000ef [ 0.771265] #PF: supervisor read access in kernel mode [ 0.771773] #PF: error_code(0x0000) - not-present page [ 0.772609] Oops: 0000 [#1] PREEMPT SMP PTI [ 0.774878] RIP: 0010:tty_open+0x268/0x6f0 [ 0.784013] chrdev_open+0xbd/0x230 [ 0.784444] ? cdev_device_add+0x80/0x80 [ 0.784920] do_dentry_open+0x1e0/0x410 [ 0.785389] path_openat+0xca9/0x1050 [ 0.785813] do_filp_open+0xaa/0x150 [ 0.786240] file_open_name+0x133/0x1b0 [ 0.786746] filp_open+0x27/0x50 [ 0.787244] console_on_rootfs+0x14/0x4d [ 0.787800] kernel_init_freeable+0x1e4/0x20d [ 0.788383] ? rest_init+0xc0/0xc0 [ 0.788881] kernel_init+0x11/0x120 [ 0.789356] ret_from_fork+0x22/0x30

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 99f1fe189daf8e99a847e420567e49dd7ee2aae7 to < 3df6f492f500a16c231f07ccc6f6ed1302caddf9affected
  • 99f1fe189daf8e99a847e420567e49dd7ee2aae7 to < b79109d6470aaae7062998353e3a19449055829daffected
  • 99f1fe189daf8e99a847e420567e49dd7ee2aae7 to < 953a4a352a0c185460ae1449e4c6e6658e55fdfcaffected
  • 99f1fe189daf8e99a847e420567e49dd7ee2aae7 to < 84ea44dc3e4ecb2632586238014bf6722aa5843baffected
  • 99f1fe189daf8e99a847e420567e49dd7ee2aae7 to < f9d9d25ad1f0d060eaf297a2f7f03b5855a45561affected
  • 99f1fe189daf8e99a847e420567e49dd7ee2aae7 to < 765566110eb0da3cf60198b0165ecceeaafa6444affected
  • 99f1fe189daf8e99a847e420567e49dd7ee2aae7 to < fcfeaa570f7a5c2d5f4f14931909531ff18b7fdeaffected
  • 99f1fe189daf8e99a847e420567e49dd7ee2aae7 to < db4df8e9d79e7d37732c1a1b560958e8dadfefa1affected

Linux Linux

Default version status: affected

  • 2.6.28affected
  • 0 to < 2.6.28unaffected
  • 4.14.308 to ≤ 4.14.*unaffected
  • 4.19.276 to ≤ 4.19.*unaffected
  • 5.4.235 to ≤ 5.4.*unaffected
  • 5.10.173 to ≤ 5.10.*unaffected
  • 5.15.100 to ≤ 5.15.*unaffected
  • 6.1.18 to ≤ 6.1.*unaffected
  • 6.2.5 to ≤ 6.2.*unaffected
  • 6.3 to ≤ *unaffected

References