CVE-2016-4557
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…
- Published
- Updated
- Reserved
- Assigned by
- mitre
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.
Public exploit
A reference of the record is tagged as an exploit or proof of concept: anyone can try it against an unpatched system.
- 40759 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
Timeline
ID reserved
By mitre
- 17 days later
· 17 days later
Published
- 8 years later
· 8 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 10.2% · top 4.3% of all CVEs (8 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
- n/a
Affected products
n/a
- affected n/a
References (9)
- https://bugs.debian.org/823603 (opens in a new tab)x_refsource_CONFIRMx_transferred
- openSUSE-SU-2016:1641 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=1334307 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/torvalds/linux/commit/8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://bugs.chromium.org/p/project-zero/issues/detail?id=808 (opens in a new tab)x_refsource_MISCx_transferred
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7 (opens in a new tab)x_refsource_CONFIRMx_transferred
- [oss-security] 20160506 CVE Requests: Linux: BPF flaws (one use-after-free / local root privilege escalation) (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- 40759 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2016-4557)Record last updated .