| Name | CVE-2016-4557 |
| Description | The replace_map_fd_with_map_ptr function in kernel/bpf/verifier.c in the Linux kernel before 4.5.5 does not properly maintain an fd data structure, which allows local users to gain privileges or cause a denial of service (use-after-free) via crafted BPF instructions that reference an incorrect file descriptor. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 823603 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| linux (PTS) | jessie, jessie (lts) | 3.16.84-1 | fixed |
| stretch (security) | 4.9.320-2 | fixed |
| stretch (lts), stretch | 4.9.320-3 | fixed |
| buster (security), buster, buster (lts) | 4.19.316-1 | fixed |
| bullseye | 5.10.223-1 | fixed |
| bullseye (security) | 5.10.226-1 | fixed |
| bookworm | 6.1.115-1 | fixed |
| bookworm (security) | 6.1.119-1 | fixed |
| trixie | 6.12.5-1 | fixed |
| sid | 6.12.6-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| linux | source | wheezy | (not affected) | | | |
| linux | source | jessie | (not affected) | | | |
| linux | source | (unstable) | 4.5.3-1 | | | 823603 |
Notes
[jessie] - linux <not-affected> (Issue introduced later)
[wheezy] - linux <not-affected> (Issue introduced later)
https://bugs.chromium.org/p/project-zero/issues/detail?id=808
Fixed by: https://git.kernel.org/linus/8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7 (v4.6-rc6)
Introduced by: https://git.kernel.org/linus/0246e64d9a5fcd4805198de59b9b5cf1f974eb41 (v3.18-rc1)
Exploitable since: https://git.kernel.org/linus/1be7f75d1668d6296b80bf35dcf6762393530afc (v4.4-rc1)
https://www.openwall.com/lists/oss-security/2016/05/06/4