In the Linux kernel, the following vulnerability has been resolved:
signal: avoid shared siginfo namespace rewrites
send_signal_locked() rewrites sender ids for the target namespace. Group
sends reuse the same siginfo, so one recipient can affect the next.
Copy the siginfo before changing it.
References 8
https://git.kernel.org/stable/c/03c8761e75d1619906bb503686f9cc1dfc6a67f4
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/148b0dae2a1755beb873a2aab51fb191414f068c
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/4ee7c4e4719a825052f42f02ec159b5b42b68fbc
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/6b1de022304ef85284c5933a5fb8492f6f54efc9
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/a246da20c8e4ae4319511c698b9f26ad0ad1769f
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/b655c2040ce836afad5643842543567b31f8c11d
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/d19cdc167e696714509e87d3f7ae765b6e164589
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/e015d1ac6b43a23c52c5163299414ae77d7d4ae0
416baaa9-dc9f-4396-8d5f-8c081fb06d67