In the Linux kernel, the following vulnerability has been resolved:
bpf: Fix a potential use-after-free in bpf_link_free()
After commit 1a80dbcb2dba, bpf_link can be freed by
link->ops->dealloc_deferred, but the code still tests and uses
link->ops->dealloc afterward, which leads to a use-after-free as
reported by syzbot. Actually, one of them should be sufficient, so
just call one of them instead of both. Also add a WARN_ON() in case
of any problematic implementation.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 24.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-aws | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-azure | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-gcp | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-gke | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-ibm | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-intel | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-lowlatency | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-nvidia | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-oem-6.8 | < any | UNKNOWN |
git.kernel.org/linus/2884dc7d08d98a89d8d65121524bb7533183a63a (6.10-rc3)
git.kernel.org/stable/c/2884dc7d08d98a89d8d65121524bb7533183a63a
git.kernel.org/stable/c/91cff53136daeff50816b0baeafd38a6976f6209
git.kernel.org/stable/c/fa97b8fed9896f1e89cb657513e483a152d4c382
launchpad.net/bugs/cve/CVE-2024-40909
nvd.nist.gov/vuln/detail/CVE-2024-40909
security-tracker.debian.org/tracker/CVE-2024-40909
www.cve.org/CVERecord?id=CVE-2024-40909