CVE-2026-68369
usb: gadget: printer: fix infinite loop in printer_read()
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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
- 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: printer: fix infinite loop in printer_read() printer_read() uses the same variable for the requested copy size and the number of bytes actually copied to user space. copy_to_user() returns the number of bytes not copied, so when it fails to copy anything, the computed copied length becomes zero. In that case len, buf, current_rx_bytes and current_rx_buf are left unchanged. If RX data is available and the user buffer remains unwritable, the read loop can repeat indefinitely. Track the copied length separately and return -EFAULT, or the number of bytes already copied, if an iteration makes no progress.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
4.1
References 8
git.kernel.org
- stable/c/3f81197364b57e5318620c75f3bd63f405f60552
- stable/c/e225e2998e5a9b83c838dbbe4511fb0d63f88daf
- stable/c/3081b0e187065c3b9577e393ad664b12854aeaf3
- stable/c/994afccfdcceb73be33f69a8a8ea71e260c9eca5
- stable/c/e03597ad9494b500344076589aeaa6c6d2d381d3
- stable/c/4cde0b38cc0cb8b7dc17295801015148de37d1d2
- stable/c/e41bbbbb1740ce4d7270ab1cdeca13892d6a8d2e
- stable/c/c2e819be6a5c7f34344926b4bd7e3dfca58cf48a