CVE-2024-40905 — NULL Pointer Dereference in Linux
Severity
4.7MEDIUMNVD
OSV7.8OSV5.5OSV5.3
EPSS
0.0%
top 98.94%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedJul 12
Latest updateAug 14
Description
In the Linux kernel, the following vulnerability has been resolved:
ipv6: fix possible race in __fib6_drop_pcpu_from()
syzbot found a race in __fib6_drop_pcpu_from() [1]
If compiler reads more than once (*ppcpu_rt),
second read could read NULL, if another cpu clears
the value in rt6_get_pcpu_route().
Add a READ_ONCE() to prevent this race.
Also add rcu_read_lock()/rcu_read_unlock() because
we rely on RCU protection while dereferencing pcpu_rt.
[1]
Oops: general protection fault, probably …
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.0 | Impact: 3.6
Affected Packages6 packages
▶CVEListV5linux/linuxd52d3997f843ffefaa8d8462790ffcaca6c74192 — c90af1cced2f669a7b2304584be4ada495eaa0e5+7