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.

https://git.kernel.org/stable/c/11207e42a332eb8bbcb9fe74df9edd2a807c5607

https://git.kernel.org/stable/c/3104a3f40feb107f77d7116ad9bf6c210ab7babf

https://git.kernel.org/stable/c/3d3b89e6ab93bdd0efd45828bda6b0e61cc46dff

https://git.kernel.org/stable/c/484357dff256c816d9466bda35eb765685e4dc86

https://git.kernel.org/stable/c/a76511bc654819425d3b15e77b523d7f9d81f064

https://git.kernel.org/stable/c/f1dc8e72de9aabe5d96767a4e97219ac26b79fe5

https://git.kernel.org/stable/c/f2a880e802ad12d1e38039d1334fb1475d0f5241

https://git.kernel.org/stable/c/fed8b8f33a46db0ee2efdb000f4f630c86ed8ca4

[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["drivers/tty/hvc/hvc_iucv.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"44a01d5ba8a4d543694461cd3e178cfa6b3f221b","lessThan":"3d3b89e6ab93bdd0efd45828bda6b0e61cc46dff","versionType":"git","status":"affected"},{"version":"44a01d5ba8a4d543694461cd3e178cfa6b3f221b","lessThan":"484357dff256c816d9466bda35eb765685e4dc86","versionType":"git","status":"affected"},{"version":"44a01d5ba8a4d543694461cd3e178cfa6b3f221b","lessThan":"11207e42a332eb8bbcb9fe74df9edd2a807c5607","versionType":"git","status":"affected"},{"version":"44a01d5ba8a4d543694461cd3e178cfa6b3f221b","lessThan":"fed8b8f33a46db0ee2efdb000f4f630c86ed8ca4","versionType":"git","status":"affected"},{"version":"44a01d5ba8a4d543694461cd3e178cfa6b3f221b","lessThan":"a76511bc654819425d3b15e77b523d7f9d81f064","versionType":"git","status":"affected"},{"version":"44a01d5ba8a4d543694461cd3e178cfa6b3f221b","lessThan":"3104a3f40feb107f77d7116ad9bf6c210ab7babf","versionType":"git","status":"affected"},{"version":"44a01d5ba8a4d543694461cd3e178cfa6b3f221b","lessThan":"f1dc8e72de9aabe5d96767a4e97219ac26b79fe5","versionType":"git","status":"affected"},{"version":"44a01d5ba8a4d543694461cd3e178cfa6b3f221b","lessThan":"f2a880e802ad12d1e38039d1334fb1475d0f5241","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["drivers/tty/hvc/hvc_iucv.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"2.6.29","status":"affected"},{"version":"0","lessThan":"2.6.29","versionType":"semver","status":"unaffected"},{"version":"5.10.258","lessThanOrEqual":"5.10.*","versionType":"semver","status":"unaffected"},{"version":"5.15.209","lessThanOrEqual":"5.15.*","versionType":"semver","status":"unaffected"},{"version":"6.1.175","lessThanOrEqual":"6.1.*","versionType":"semver","status":"unaffected"},{"version":"6.6.141","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.91","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.33","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.0.10","lessThanOrEqual":"7.0.*","versionType":"semver","status":"unaffected"},{"version":"7.1","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]