usb: gadget: f_midi2: fix use-after-free in string attribute show path
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 6.6.157, 6.12.110, 6.18.51, 7.2.5
- 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: usb: gadget: f_midi2: fix use-after-free in string attribute show path f_midi2_opts_str_show() takes the string lock internally, but its callers dereference the opts->info.<field> pointer before calling it, outside the lock. This races with f_midi2_opts_str_store(), which frees the old string under opts->lock when the attribute is written concurrently, the show path can read a pointer that gets freed before the lock inside str_show() is even taken. Change f_midi2_opts_str_show() to take a pointer to the string field, matching the existing pattern in f_midi2_opts_str_store(), and dereference it only after the lock is held. Update all three callers (iface_name, block name, and the EP string option macro) accordingly.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From 29ee7a4dddd5caa18d1cef000f20c6af43f762f1 · fixed in f9bdf4c4f6410a1dfafafa383a0e21069372657f; From 29ee7a4dddd5caa18d1cef000f20c6af43f762f1 · fixed in d11f3300b39e2daad2f0d9d66ddcc39a156cb594; From 29ee7a4dddd5caa18d1cef000f20c6af43f762f1 · fixed in e89e30f0b5d3004fe5955250bd8b04f3733e32ce; From 29ee7a4dddd5caa18d1cef000f20c6af43f762f1 · fixed in 49fab5e1bdb205c36c965d0e9677bc40d282d3a2; From 29ee7a4dddd5caa18d1cef000f20c6af43f762f1 · fixed in fed0aa7c6eaedc6c0d4e362fc91724aa47be4a7b
- Linux Linux
6.6
- KernelLinux
From 6.6.0 · fixed in 6.6.157; From 6.7.0 · fixed in 6.12.110; From 6.13.0 · fixed in 6.18.51; From 6.19.0 · fixed in 7.2.5