CVE-2016-9576: linux linux_kernel Use After Free
Vulnerability summary
CVE-2016-9576 is a high (CVSS 7.8) Use After Free vulnerability in linux linux_kernel. EPSS estimates a 0.44% chance of exploitation in the next 30 days, higher than 38% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 37 · Related 29Timeline
- 28-12-2016PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
The blk_rq_map_user_iov function in block/blk-map.c in the Linux kernel before 4.8.14 does not properly restrict the type of iterator, which allows local users to read or write to arbitrary kernel memory locations or cause a denial of service (use-after-free) by leveraging access to a /dev/sg device.
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
0.44%
Chance of exploitation in the next 30 days
Percentile
38%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.44% 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
0 foundNo public exploits indexed.
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< 4.4.0-62.83
- linux-aws< 4.4.0-1003.12
- linux-hwe< 4.8.0-39.42~16.04.1
- linux-lts-xenial< 4.4.0-62.83~14.04.1
- linux-raspi2< 4.4.0-1042.49
Debian1 product
- linux< 4.8.15-1
Linux1 product
- linux_kernel≥ 4.0, < 4.4.38 | ≥ 4.5, < 4.8.14
3 vendors · 8 products
References
25 links- lists.opensuse.org/opensuse-security-announce/2016-12/msg00057.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2016-12/msg00088.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2016-12/msg00040.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- github.com/torvalds/linux/commit/a0ac402cfcdc904f9772e1762b3fda112dcc56a0X Refsource CONFIRMPatchVendor Advisory
- lists.opensuse.org/opensuse-security-announce/2016-12/msg00072.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2016-12/msg00041.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2016-12/msg00062.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2016-12/msg00075.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
Show all 25 references
- lists.opensuse.org/opensuse-security-announce/2016-12/msg00081.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.14X Refsource CONFIRMRelease NotesVendor Advisory
- www.openwall.com/lists/oss-security/2016/12/08/19Mailing ListX Refsource MLISTPatchThird Party AdvisoryREPORT
- lists.opensuse.org/opensuse-security-announce/2016-12/msg00091.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
