cbcvebase.
CVE-2024-26999
published 2024-05-01

CVE-2024-26999: 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…

PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.18%
8.0th percentile
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.

Affected

23 ranges
VendorProductVersion rangeFixed in
debiandebian_linux
debianlinux< linux 6.1.90-1 (bookworm)linux 6.1.90-1 (bookworm)
linuxlinux
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 69a02273e288011b521ee7c1f3ab2c23fda633ce69a02273e288011b521ee7c1f3ab2c23fda633ce
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < d679c816929d62af51c8e6d7fc0e165c9412d2f3d679c816929d62af51c8e6d7fc0e165c9412d2f3
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ab86cf6f8d24e63e9aca23da5108af1aa5483928ab86cf6f8d24e63e9aca23da5108af1aa5483928
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 7a3bbe41efa55323b6ea3c35fa15941d4dbecdef7a3bbe41efa55323b6ea3c35fa15941d4dbecdef
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < bbaafbb4651fede8d3c3881601ecaa4f834f9d3fbbaafbb4651fede8d3c3881601ecaa4f834f9d3f
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 52aaf1ff14622a04148dbb9ccce6d9de5d534ea752aaf1ff14622a04148dbb9ccce6d9de5d534ea7
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ca09dfc3cfdf89e6af3ac24e1c6c0be5c575a729ca09dfc3cfdf89e6af3ac24e1c6c0be5c575a729
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 1be3226445362bfbf461c92a5bcdb1723f2e49071be3226445362bfbf461c92a5bcdb1723f2e4907
linuxlinux_kernel
linuxlinux_kernel>= 0 < 5.10.216-15.10.216-1
linuxlinux_kernel>= 0 < 6.1.90-16.1.90-1
linuxlinux_kernel>= 0 < 6.8.9-16.8.9-1
linuxlinux_kernel>= 0 < 6.8.9-16.8.9-1
linuxlinux_kernel>= 0 < 5.4.0-189.2095.4.0-189.209
linuxlinux_kernel>= 0 < 5.15.0-116.1265.15.0-116.126
linuxlinux_kernel>= 0 < 6.8.0-38.386.8.0-38.38
linuxlinux_kernel>= 2.6.12 < 5.15.1575.15.157
linuxlinux_kernel>= 5.16 < 6.1.886.1.88
linuxlinux_kernel>= 6.2 < 6.6.296.6.29
linuxlinux_kernel>= 6.7 < 6.8.86.8.8

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv7.0HIGH
vendor_ubuntu7.0HIGH
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.