ACPI: pfr_update: fix stack buffer overflow in query_capability()
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.1.188, 6.6.157, 6.12.109, 6.18.50, 7.2.4
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
In the Linux kernel, the following vulnerability has been resolved: ACPI: pfr_update: fix stack buffer overflow in query_capability() query_capability() copies four ACPI buffer objects returned by the firmware _DSM into fixed-size u8[16] fields in struct pfru_update_cap_info using memcpy with the firmware-supplied length: memcpy(&cap_hdr->code_type, elements[CAP_CODE_TYPE_IDX].buffer.pointer, elements[CAP_CODE_TYPE_IDX].buffer.length); The same pattern repeats for drv_type, platform_id, and oem_id. If the firmware returns buffer.length > 16 for any of these fields, memcpy writes past the destination array. struct pfru_update_cap_info is stack-allocated in pfru_ioctl(). Confirmed with KASAN on 7.2-rc6: three stack-out-of-bounds reports are generated when a DSM returns 64-byte buffers, with writes reaching 44 bytes past the end of cap_hdr's [64, 156) frame window into adjacent stack redzones. Introduce a helper pointer to out_obj->package.elements and use it to validate each buffer length against its destination field size before copying, returning -EINVAL if the firmware supplies an oversized buffer.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From 0db89fa243e5edc5de38c88b369e4c3755c5fb74 · fixed in d3af83e327565a9444cebc0db714cb837e493046; From 0db89fa243e5edc5de38c88b369e4c3755c5fb74 · fixed in c5a31b4e7e37c92550be9a2edf51ca853a4d251a; From 0db89fa243e5edc5de38c88b369e4c3755c5fb74 · fixed in a2151624b55029dad0ca7efd17fb83a0461c8843; From 0db89fa243e5edc5de38c88b369e4c3755c5fb74 · fixed in 6d4ed2fd022bc862b156e53aae163b61259e1caa; From 0db89fa243e5edc5de38c88b369e4c3755c5fb74 · fixed in 15d2b7f38f95d28652170344f39ee492c55e567c; From 0db89fa243e5edc5de38c88b369e4c3755c5fb74 · fixed in ced45be0073a8a31b30b4a7f68cd3a15734515de
- Linux Linux
5.17
- KernelLinux
From 5.17.0 · fixed in 6.1.188; From 6.2.0 · fixed in 6.6.157; From 6.7.0 · fixed in 6.12.109; From 6.13.0 · fixed in 6.18.50; From 6.19.0 · fixed in 7.2.4