CVE-2024-53125

Advisory lineage Upstream: 0 Downstream: 67
Modified
Published: 04 Dec 2024, 14:11
Last modified:11 May 2026, 20:51

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.01% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

04 Dec 2024, 14:11
Published
Vulnerability first disclosed
11 May 2026, 20:51
Last Modified
Vulnerability information updated

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 Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.01%• Percentile: 3%

Affected Systems

  • linux•linux

    ≥ 75748837b7e56919679e02163f45d5818c644d03, < dadf82c1b2608727bcc306843b540cd7414055a7 | ≥ 75748837b7e56919679e02163f45d5818c644d03, < b57ac2d92c1f565743f6890a5b9cf317ed856b09 | ≥ 75748837b7e56919679e02163f45d5818c644d03, < 60fd3538d2a8fd44c41d25088c0ece3e1fd30659 | ≥ 75748837b7e56919679e02163f45d5818c644d03, < bfe9446ea1d95f6cb7848da19dfd58d2eec6fd84 | ≥ 75748837b7e56919679e02163f45d5818c644d03, < e2ef0f317a52e678fe8fa84b94d6a15b466d6ff0 | ≥ 75748837b7e56919679e02163f45d5818c644d03, < e9bd9c498cb0f5843996dbe5cbce7a1836a83c70 | 5.10

  • linux•linux_kernel

    ≥ 5.10, < 5.10.232 | ≥ 5.11, < 5.15.175 | ≥ 5.16, < 6.1.121 | ≥ 6.2, < 6.6.67 | ≥ 6.7, < 6.11.6 | 6.12:rc1 | 6.12:rc2 | 6.12:rc3

References (8)