bpf: Allow delete from sockmap/sockhash only if update is allowed
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 5.10.219, 5.15.161, 6.1.93, 6.6.33, 5.5, and 2 more
- 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: Allow delete from sockmap/sockhash only if update is allowed We have seen an influx of syzkaller reports where a BPF program attached to a tracepoint triggers a locking rule violation by performing a map_delete on a sockmap/sockhash. We don't intend to support this artificial use scenario. Extend the existing verifier allowed-program-type check for updating sockmap/sockhash to also cover deleting from a map. From now on only BPF programs which were previously allowed to update sockmap/sockhash can delete from these map types.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Linux Linux
From dd54b48db0c822ae7b520bc80751f0a0a173ef75 · fixed in 29467edc23818dc5a33042ffb4920b49b090e63d; From d1e73fb19a4c872d7a399ad3c66e8ca30e0875ec · fixed in 11e8ecc5b86037fec43d07b1c162e233e131b1d9; From a44770fed86515eedb5a7c00b787f847ebb134a5 · fixed in 6693b172f008846811f48a099f33effc26068e1e; From 668b3074aa14829e2ac2759799537a93b60fef86 · fixed in 000a65bf1dc04fb2b65e2abf116f0bc0fc2ee7b1; From ff91059932401894e6c86341915615c5eb0eca48 · fixed in b81e1c5a3c70398cf76631ede63a03616ed1ba3c; From ff91059932401894e6c86341915615c5eb0eca48 · fixed in 98e948fb60d41447fd8d2d0c3b8637fc6b6dc26d; From 5.10.215 · fixed in 5.10.219; From 5.15.154 · fixed in 5.15.161; From 6.1.85 · fixed in 6.1.93; From 6.6.26 · fixed in 6.6.33; From 5.4.274 · fixed in 5.5; From 6.8.5 · fixed in 6.9
- Linux Linux
6.9
- KernelLinux
fixed in 5.10.219; From 5.11.0 · fixed in 5.15.161; From 5.16.0 · fixed in 6.1.93; From 6.2.0 · fixed in 6.6.33; From 6.7.0 · fixed in 6.9.4