CVE-2016-9793: linux linux_kernel
Vulnerability summary
CVE-2016-9793 is a high (CVSS 7.8) vulnerability in linux linux_kernel. EPSS estimates a 1.57% chance of exploitation in the next 30 days, higher than 75.3% of scored vulnerabilities. 1 public exploit is recorded.
Public exploit (exploit-database, 22-03-2017)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 20 · Related 13Timeline
- 28-12-2016PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
The sock_setsockopt function in net/core/sock.c in the Linux kernel before 4.8.14 mishandles negative values of sk_sndbuf and sk_rcvbuf, which allows local users to cause a denial of service (memory corruption and system crash) or possibly have unspecified other impact by leveraging the CAP_NET_ADMIN capability for a crafted setsockopt system call with the (1) SO_SNDBUFFORCE or (2) SO_RCVBUFFORCE option.
CVSS metrics
5 scores · 3 sources · 3 versions- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
1.57%
Chance of exploitation in the next 30 days
Percentile
75%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.57% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundLinux Kernel 3.11 < 4.8 0 - 'SO_SNDBUFFORCE' / 'SO_RCVBUFFORCE' Local Privilege Escalation
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu6 products
- linux< 3.13.0-107.154 | < 4.4.0-59.80
- linux-aws< 4.4.0-1003.12
- linux-lts-vivid< 3.19.0-79.87~14.04.1
- linux-lts-xenial< 4.4.0-59.80~14.04.1
- linux-raspi2< 4.4.0-1040.47
Debian1 product
- linux< 4.8.15-1
Linux1 product
- linux_kernel≥ 3.5, < 3.12.69 | ≥ 3.13, < 3.16.40 | ≥ 3.17, < 3.18.52 | ≥ 3.19, < 4.1.50 | ≥ 4.2, < 4.4.38 | ≥ 4.5, < 4.8.14
3 vendors · 8 products
References
24 links- github.com/torvalds/linux/commit/b98b0bc8c431e3ceb4b26b0dfc8db509518fb290X Refsource CONFIRMPatchVendor AdvisoryREPORT
- www.openwall.com/lists/oss-security/2016/12/03/1Mailing ListX Refsource MLISTPatchThird Party Advisory
- www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.14X Refsource CONFIRMRelease NotesVendor Advisory
