cbcvebase.
CVE-2024-53125
published 2024-12-04

CVE-2024-53125: In the Linux kernel, the following vulnerability has been resolved: bpf: sync_linked_regs() must preserve subreg_def Range propagation must not affect…

PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.22%
13.1th percentile
In the Linux kernel, the following vulnerability has been resolved: bpf: sync_linked_regs() must preserve subreg_def Range propagation must not affect subreg_def marks, otherwise the following example is rewritten by verifier incorrectly when BPF_F_TEST_RND_HI32 flag is set: 0: call bpf_ktime_get_ns call bpf_ktime_get_ns 1: r0 &= 0x7fffffff after verifier r0 &= 0x7fffffff 2: w1 = w0 rewrites w1 = w0 3: if w0 r11 = 0x2f5674a6 (r) 4: r1 >>= 32 r11 >= 32 r0 = r1 exit (or zero extension of w1 at (2) is missing for architectures that require zero extension for upper register half). The following happens w/o this patch: - r0 is marked as not a subreg at (0); - w1 is marked as subreg at (2); - w1 subreg_def is overridden at (3) by copy_register_state(); - w1 is read at (5) but mark_insn_zext() does not mark (2) for zero extension, because w1 subreg_def is not set; - because of BPF_F_TEST_RND_HI32 flag verifier inserts random value for hi32 bits of (2) (marked (r)); - this random value is read at (5).

Affected

25 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.123-1 (bookworm)linux 6.1.123-1 (bookworm)
debianlinux-6.1< linux 6.1.123-1 (bookworm)linux 6.1.123-1 (bookworm)
googlechrome_chrome
linuxlinux
linuxlinux>= 75748837b7e56919679e02163f45d5818c644d03 < dadf82c1b2608727bcc306843b540cd7414055a7dadf82c1b2608727bcc306843b540cd7414055a7
linuxlinux>= 75748837b7e56919679e02163f45d5818c644d03 < b57ac2d92c1f565743f6890a5b9cf317ed856b09b57ac2d92c1f565743f6890a5b9cf317ed856b09
linuxlinux>= 75748837b7e56919679e02163f45d5818c644d03 < 60fd3538d2a8fd44c41d25088c0ece3e1fd3065960fd3538d2a8fd44c41d25088c0ece3e1fd30659
linuxlinux>= 75748837b7e56919679e02163f45d5818c644d03 < bfe9446ea1d95f6cb7848da19dfd58d2eec6fd84bfe9446ea1d95f6cb7848da19dfd58d2eec6fd84
linuxlinux>= 75748837b7e56919679e02163f45d5818c644d03 < e2ef0f317a52e678fe8fa84b94d6a15b466d6ff0e2ef0f317a52e678fe8fa84b94d6a15b466d6ff0
linuxlinux>= 75748837b7e56919679e02163f45d5818c644d03 < e9bd9c498cb0f5843996dbe5cbce7a1836a83c70e9bd9c498cb0f5843996dbe5cbce7a1836a83c70
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel>= 0 < 5.10.234-15.10.234-1
linuxlinux_kernel>= 0 < 6.1.123-16.1.123-1
linuxlinux_kernel>= 0 < 6.11.6-16.11.6-1
linuxlinux_kernel>= 0 < 6.11.6-16.11.6-1
linuxlinux_kernel>= 0 < 5.15.0-135.1465.15.0-135.146
linuxlinux_kernel>= 0 < 6.8.0-60.636.8.0-60.63
linuxlinux_kernel>= 0 < 6.11.0-18.186.11.0-18.18
linuxlinux_kernel>= 5.10 < 5.10.2325.10.232
linuxlinux_kernel>= 5.11 < 5.15.1755.15.175
linuxlinux_kernel>= 5.16 < 6.1.1216.1.121
linuxlinux_kernel>= 6.2 < 6.6.676.6.67
linuxlinux_kernel>= 6.7 < 6.11.66.11.6

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv7.8HIGH
vendor_ubuntu7.8HIGH
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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