bpf: Propagate error from htab_lock_bucket() to userspace
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 5.15.75, 5.19.17, 6.0.3
- 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
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Propagate error from htab_lock_bucket() to userspace In __htab_map_lookup_and_delete_batch() if htab_lock_bucket() returns -EBUSY, it will go to next bucket. Going to next bucket may not only skip the elements in current bucket silently, but also incur out-of-bound memory access or expose kernel memory to userspace if current bucket_cnt is greater than bucket_size or zero. Fixing it by stopping batch operation and returning -EBUSY when htab_lock_bucket() fails, and the application can retry or skip the busy batch as needed.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Linux Linux
From 20b6cc34ea74b6a84599c1f8a70f3315b56a1883 · fixed in 0e13425104903970a5ede853082d3bbb4edec6f3; From 20b6cc34ea74b6a84599c1f8a70f3315b56a1883 · fixed in 6bfee6eb3d6b96ae730a542909dd22b5f9f50d58; From 20b6cc34ea74b6a84599c1f8a70f3315b56a1883 · fixed in 4f1f39a8f1ce1b24fee6852d7dcd704ce7c4334d; From 20b6cc34ea74b6a84599c1f8a70f3315b56a1883 · fixed in 66a7a92e4d0d091e79148a4c6ec15d1da65f4280
- Linux Linux
5.11
- KernelLinux
From 5.11.0 · fixed in 5.15.75; From 5.16.0 · fixed in 5.19.17; From 5.20.0 · fixed in 6.0.3