CVE-2026-53306
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
36/100
Published: 2026-06-26
Modified: 2026-11-06
First seen: 2026-11-06
Status: active
Attack Surface
Low Complexity
No Interaction
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
None
I:
None
A:
High
Description
In the Linux kernel, the following vulnerability has been resolved: tty: hvc_iucv: fix off-by-one in number of supported devices MAX_HVC_IUCV_LINES == HVC_ALLOC_TTY_ADAPTERS == 8. This is the number of entries in: static struct hvc_iucv_private *hvc_iucv_table[MAX_HVC_IUCV_LINES]; Sometimes hvc_iucv_table[] is limited by: (a) if (num > hvc_iucv_devices) // for error detection or (b) for (i = 0; i < hvc_iucv_devices; i++) // in 2 places (so these 2 don't agree; second one appears to be correct to me.) hvc_iucv_devices can be 0..8. This is a counter. (c) if (hvc_iucv_devices > MAX_HVC_IUCV_LINES) If hvc_iucv_devices == 8, (a) allows the code to access hvc_iucv_table[8]. Oops.
Weakness Classification (1)
Affected Software (10)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | 44a01d5ba8a4d543694461cd3e178cfa6b3f221b < 3d3b89e6ab93bdd0efd45828bda6b0e61cc46dff |
| Linux | Linux | 44a01d5ba8a4d543694461cd3e178cfa6b3f221b < 484357dff256c816d9466bda35eb765685e4dc86 |
| Linux | Linux | 44a01d5ba8a4d543694461cd3e178cfa6b3f221b < 11207e42a332eb8bbcb9fe74df9edd2a807c5607 |
| Linux | Linux | 44a01d5ba8a4d543694461cd3e178cfa6b3f221b < fed8b8f33a46db0ee2efdb000f4f630c86ed8ca4 |
| Linux | Linux | 44a01d5ba8a4d543694461cd3e178cfa6b3f221b < a76511bc654819425d3b15e77b523d7f9d81f064 |
| Linux | Linux | 44a01d5ba8a4d543694461cd3e178cfa6b3f221b < 3104a3f40feb107f77d7116ad9bf6c210ab7babf |
| Linux | Linux | 44a01d5ba8a4d543694461cd3e178cfa6b3f221b < f1dc8e72de9aabe5d96767a4e97219ac26b79fe5 |
| Linux | Linux | 44a01d5ba8a4d543694461cd3e178cfa6b3f221b < f2a880e802ad12d1e38039d1334fb1475d0f5241 |
| Linux | Linux | 2.6.29 |
| linux | linux_kernel | 2.6.29 – 5.10.258 |