CVE-2024-56675 — Use After Free in Linux
Severity
7.8HIGHNVD
OSV7.1OSV6.2OSV5.5
EPSS
0.0%
top 93.42%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedDec 27
Latest updateMay 29
Description
In the Linux kernel, the following vulnerability has been resolved:
bpf: Fix UAF via mismatching bpf_prog/attachment RCU flavors
Uprobes always use bpf_prog_run_array_uprobe() under tasks-trace-RCU
protection. But it is possible to attach a non-sleepable BPF program to a
uprobe, and non-sleepable BPF programs are freed via normal RCU (see
__bpf_prog_put_noref()). This leads to UAF of the bpf_prog because a normal
RCU grace period does not imply a tasks-trace-RCU grace period.
Fix it by explic…
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9