CVE-2024-53125

MEDIUM EPSS 10.9%
Published Dec 4, 20241y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Dec 4, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

Description

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 < 10 goto +0 --------------> r11 = 0x2f5674a6 (r) 4: r1 >>= 32 r11 <<= 32 (r) 5: r0 = r1 r1 |= r11 (r) 6: exit; if w0 < 0xa goto pc+0 r1 >>= 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).

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
10.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 8

VendorProductVersionRange
linuxlinux_kernel*≥5.10  –  <5.10.232
linuxlinux_kernel*≥5.11  –  <5.15.175
linuxlinux_kernel*≥5.16  –  <6.1.121
linuxlinux_kernel*≥6.2  –  <6.6.67
linuxlinux_kernel*≥6.7  –  <6.11.6
linuxlinux_kernel6.12any
linuxlinux_kernel6.12any
linuxlinux_kernel6.12any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/60fd3538d2a8fd44c41d25088c0ece3e1fd30659
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b57ac2d92c1f565743f6890a5b9cf317ed856b09
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bfe9446ea1d95f6cb7848da19dfd58d2eec6fd84
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dadf82c1b2608727bcc306843b540cd7414055a7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e2ef0f317a52e678fe8fa84b94d6a15b466d6ff0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e9bd9c498cb0f5843996dbe5cbce7a1836a83c70
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/60fd3538d2a8fd44c41d25088c0ece3e1fd30659
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b57ac2d92c1f565743f6890a5b9cf317ed856b09
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bfe9446ea1d95f6cb7848da19dfd58d2eec6fd84
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dadf82c1b2608727bcc306843b540cd7414055a7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e2ef0f317a52e678fe8fa84b94d6a15b466d6ff0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e9bd9c498cb0f5843996dbe5cbce7a1836a83c70
    Patch