Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
Linux Linux — misc: fastrpc: Fix use-after-free race condition for maps
AV AC PR UI S C I A CVSS EPSS %ile KEV
L H L N U H H H 7.0 .0024 15.9 —
AFFECTED
Product Versions Fixed
Linux c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 – —
Linux 5.1 – 5.4.230
TIMELINE
Jul 16 Reserved by Linux
Aug 21 Published (CNA: Linux)
Aug 4 RESCORED — CVE-2022-48872 (Linux). CVSS 7.8 → 7 (NVD).
Description
In the Linux kernel, the following vulnerability has been resolved:
misc: fastrpc: Fix use-after-free race condition for maps
It is possible that in between calling fastrpc_map_get() until
map->fl->lock is taken in fastrpc_free_map(), another thread can call
fastrpc_map_lookup() and get a reference to a map that is about to be
deleted.
Rewrite fastrpc_map_get() to only increase the reference count of a map
if it's non-zero. Propagate this to callers so they can know if a map is
about to be deleted.
Fixes this warning:
refcount_t: addition on 0; use-after-free.
WARNING: CPU: 5 PID: 10100 at lib/refcount.c:25 refcount_warn_saturate
...
Call trace:
refcount_warn_saturate
[fastrpc_map_get inlined]
[fastrpc_map_lookup inlined]
fastrpc_map_create
fastrpc_internal_invoke
fastrpc_device_ioctl
__arm64_sys_ioctl
invoke_syscall
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
| July 16, 2024 | Reserved | Reserved by Linux |
| August 21, 2024 | Published | Published (CNA: Linux) |
| August 4, 2026 | RESCORED | RESCORED — CVE-2022-48872 (Linux). CVSS 7.8 → 7 (NVD). |
Affected
Affected products and packages — 2 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
| Linux | Linux | — | c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 | — |
| Linux | Linux | — | 5.1 | 5.4.230 |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2022-48872 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.