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.
Affected products
- Linux / Linux44a01d5ba8a4d543694461cd3e178cfa6b3f221b – 3d3b89e6ab93bdd0efd45828bda6b0e61cc46dff
- Linux / Linux44a01d5ba8a4d543694461cd3e178cfa6b3f221b – 484357dff256c816d9466bda35eb765685e4dc86
- Linux / Linux44a01d5ba8a4d543694461cd3e178cfa6b3f221b – 11207e42a332eb8bbcb9fe74df9edd2a807c5607
- Linux / Linux44a01d5ba8a4d543694461cd3e178cfa6b3f221b – fed8b8f33a46db0ee2efdb000f4f630c86ed8ca4
- Linux / Linux44a01d5ba8a4d543694461cd3e178cfa6b3f221b – a76511bc654819425d3b15e77b523d7f9d81f064
- Linux / Linux44a01d5ba8a4d543694461cd3e178cfa6b3f221b – 3104a3f40feb107f77d7116ad9bf6c210ab7babf
- Linux / Linux44a01d5ba8a4d543694461cd3e178cfa6b3f221b – f1dc8e72de9aabe5d96767a4e97219ac26b79fe5
- Linux / Linux44a01d5ba8a4d543694461cd3e178cfa6b3f221b – f2a880e802ad12d1e38039d1334fb1475d0f5241
- Linux / Linux2.6.29 – 2.6.29
- Linux / Linux0 – 2.6.29
- Linux / Linux5.10.258 – 5.10.*
- Linux / Linux5.15.209 – 5.15.*
- Linux / Linux6.1.175 – 6.1.*
- Linux / Linux6.6.141 – 6.6.*
- Linux / Linux6.12.91 – 6.12.*
- Linux / Linux6.18.33 – 6.18.*
- Linux / Linux7.0.10 – 7.0.*
- Linux / Linux7.1 – *
References
- MISChttps://git.kernel.org/stable/c/3d3b89e6ab93bdd0efd45828bda6b0e61cc46dff
- MISChttps://git.kernel.org/stable/c/484357dff256c816d9466bda35eb765685e4dc86
- MISChttps://git.kernel.org/stable/c/11207e42a332eb8bbcb9fe74df9edd2a807c5607
- MISChttps://git.kernel.org/stable/c/fed8b8f33a46db0ee2efdb000f4f630c86ed8ca4
- MISChttps://git.kernel.org/stable/c/a76511bc654819425d3b15e77b523d7f9d81f064
- MISChttps://git.kernel.org/stable/c/3104a3f40feb107f77d7116ad9bf6c210ab7babf
- MISChttps://git.kernel.org/stable/c/f1dc8e72de9aabe5d96767a4e97219ac26b79fe5
- MISChttps://git.kernel.org/stable/c/f2a880e802ad12d1e38039d1334fb1475d0f5241