net: bridge: avoid recursive multicast port cleanup
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 6.6.160, 6.12.113, 6.18.57, 7.2.11
- 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: net: bridge: avoid recursive multicast port cleanup br_multicast_sg_del_exclude_ports() removes automatically added STAR_EXCL port groups by calling br_multicast_del_pg(). For S,G entries, that deletion calls back into br_multicast_sg_del_exclude_ports(), so a large number of STAR_EXCL ports consumes one kernel stack frame per port and can hit the stack guard page. Keep the complete port-group deletion path for cleanup, but suppress the S,G exclude-port cleanup while that helper is already walking the same entry. Normal deletion callers retain the existing behavior.
Timeline
- CVE published
- First seen by cve.now
Affected versions
- Linux Linux
From 8266a0491e92d39dc9af739e8380a0daa9b8836b · fixed in 695a5a4c69c922d9296b2d7ad5f1ce8c6858fc64; From 8266a0491e92d39dc9af739e8380a0daa9b8836b · fixed in 2fb87c6025f90191516bee3ce14b42eb3e1cfed7; From 8266a0491e92d39dc9af739e8380a0daa9b8836b · fixed in d109141ba14652146089ef78b32d5e4d5285ebad; From 8266a0491e92d39dc9af739e8380a0daa9b8836b · fixed in 7931fb9181421953f3133b408b0f2e2b8dd68b61; From 8266a0491e92d39dc9af739e8380a0daa9b8836b · fixed in 5158353121bae4f552cb677ce8c5c3ef52f93a0d
- Linux Linux
5.10
- KernelLinux
From 5.10.0 · fixed in 6.6.160; From 6.7.0 · fixed in 6.12.113; From 6.13.0 · fixed in 6.18.57; From 6.19.0 · fixed in 7.2.11