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 structure, which allows local users to gain privileges or cause a denial of service (use-after-free) via crafted BPF…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 10.2%, higher than 95% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 10.20% probability · 95th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- cve@mitre.org
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7Vendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.htmlMailing List, Third Party Advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5Vendor Advisory
- http://www.openwall.com/lists/oss-security/2016/05/06/4Mailing List, Third Party Advisory
- https://bugs.chromium.org/p/project-zero/issues/detail?id=808Third Party Advisory
- https://bugs.debian.org/823603Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1334307Issue Tracking, Third Party Advisory
- https://github.com/torvalds/linux/commit/8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7Vendor Advisory
- https://www.exploit-db.com/exploits/40759/Third Party Advisory, VDB Entry
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7Vendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.htmlMailing List, Third Party Advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5Vendor Advisory
- http://www.openwall.com/lists/oss-security/2016/05/06/4Mailing List, Third Party Advisory
- https://bugs.chromium.org/p/project-zero/issues/detail?id=808Third Party Advisory
- https://bugs.debian.org/823603Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1334307Issue Tracking, Third Party Advisory
- https://github.com/torvalds/linux/commit/8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7Vendor Advisory
- https://www.exploit-db.com/exploits/40759/Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.