In the Linux kernel, the following vulnerability has been resolved:
serial/pmac_zilog: Remove flawed mitigation for rx irq flood The mitigation
was intended to stop the irq completely. That may be better than a hard
lock-up but it turns out that you get a crash anyway if you’re using
pmac_zilog as a serial console: ttyPZ0: pmz: rx irq flood ! BUG: spinlock
recursion on CPU#0, swapper/0 That’s because the pr_err() call in
pmz_receive_chars() results in pmz_console_write() attempting to lock a
spinlock already locked in pmz_interrupt(). With CONFIG_DEBUG_SPINLOCK=y,
this produces a fatal BUG splat. The spinlock in question is the one in
struct uart_port. Even when it’s not fatal, the serial port rx function
ceases to work. Also, the iteration limit doesn’t play nicely with QEMU, as
can be seen in the bug report linked below. A web search for other reports
of the error message “pmz: rx irq flood” didn’t produce anything. So I
don’t think this code is needed any more. Remove it.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 18.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 22.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 23.10 | noarch | linux | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 14.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 16.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 18.04 | noarch | linux-aws | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux-aws | < any | UNKNOWN |
ubuntu | 22.04 | noarch | linux-aws | < any | UNKNOWN |
git.kernel.org/linus/1be3226445362bfbf461c92a5bcdb1723f2e4907 (6.9-rc5)
git.kernel.org/stable/c/1be3226445362bfbf461c92a5bcdb1723f2e4907
git.kernel.org/stable/c/52aaf1ff14622a04148dbb9ccce6d9de5d534ea7
git.kernel.org/stable/c/7a3bbe41efa55323b6ea3c35fa15941d4dbecdef
git.kernel.org/stable/c/bbaafbb4651fede8d3c3881601ecaa4f834f9d3f
git.kernel.org/stable/c/ca09dfc3cfdf89e6af3ac24e1c6c0be5c575a729
launchpad.net/bugs/cve/CVE-2024-26999
nvd.nist.gov/vuln/detail/CVE-2024-26999
security-tracker.debian.org/tracker/CVE-2024-26999
www.cve.org/CVERecord?id=CVE-2024-26999