Riskcovery

CVE-2022-48854

net: arc_emac: Fix use after free in arc_mdio_probe()

State
Published
Severity
Not scored
Published
Jul 16, 2024
Updated
May 11, 2026
Reserved
Jul 16, 2024

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

net: arc_emac: Fix use after free in arc_mdio_probe()

If bus->state is equal to MDIOBUS_ALLOCATED, mdiobus_free(bus) will free the "bus". But bus->name is still used in the next line, which will lead to a use after free.

We can fix it by putting the name in a local variable and make the bus->name point to the rodata section "name",then use the name in the error message without referring to bus to avoid the uaf.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 95b5fc03c189e4ea5c63785274cc0b77fcc3a818 to before 84c831803785c2c3bec5c28c0e8a0b72f6b41d4dAffected
  • 95b5fc03c189e4ea5c63785274cc0b77fcc3a818 to before bc0e610a6eb0d46e4123fafdbe5e6141d9fff3beAffected
LinuxLinux
  • 5.16Affected
  • before 5.16Not affected
  • 5.16.15 through 5.16.*Not affected
  • 5.17 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.