CVE-2023-5717: Out-of-bounds write in Linux kernel's Linux Kernel Performance Events (perf) component
Noroxi assessment
Priority: Monitor (action score 31/100)
- Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.90% (FIRST EPSS); higher than 60.1% of all records.
- Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: bpftool (AlmaLinux:8) 4.18.0-513.18.1.el8_9; kernel (AlmaLinux:8) 4.18.0-513.18.1.el8_9; kernel-abi-stablelists (AlmaLinux:8) 4.18.0-513.18.1.el8_9.
Low priority for now. Upgrade to bpftool (AlmaLinux:8) 4.18.0-513.18.1.el8_9; kernel (AlmaLinux:8) 4.18.0-513.18.1.el8_9; kernel-abi-stablelists (AlmaLinux:8) 4.18.0-513.18.1.el8_9 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
A heap out-of-bounds write vulnerability in the Linux kernel's Linux Kernel Performance Events (perf) component can be exploited to achieve local privilege escalation. If perf_read_group() is called while an event's sibling_list is smaller than its child's sibling_list, it can increment or write to memory locations outside of the allocated buffer. We recommend upgrading past commit 32671e3799ca2e4590773fd0e63aaa4229e50c06.
- BDU:2023-07316
- ALSA-2024:0897
- DLA-3711-1
- DSA-5594-1
- RHSA-2024:0881
- RHSA-2024:0897
- RHSA-2024:1248
- RHSA-2024:1250
- RHSA-2024:1306
- RXSA-2024:1248
- SUSE-SU-2023:4730-1
- SUSE-SU-2023:4731-1
- SUSE-SU-2023:4732-1
- SUSE-SU-2023:4733-1
- SUSE-SU-2023:4734-1
- SUSE-SU-2023:4735-1
- SUSE-SU-2023:4782-1
- SUSE-SU-2023:4783-1
- SUSE-SU-2023:4784-1
- SUSE-SU-2023:4810-1
- Published
- Oct 25, 2023
- Updated
- Oct 14, 2026
- EPSS
- 0.9% · 60th percentile
- CWE
- CWE-787
Report tools
Action score
31
Monitor
Low priority for now.
- CVSS
- 31 / 40 · 7.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.9%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 7.8
- CNA · Google
- 7.8
- agree
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- Proof of concept exists, no weaponized module
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
Running WordPress? Scan your site free with WP Lens
Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- linux linux kernel3.2.95 and later · before 3.3
- linux linux kernel3.16.50 and later · before 3.17
- linux linux kernel4.4 and later · before 4.14.328
- linux linux kernel4.15 and later · before 4.19.297
- linux linux kernel4.20 and later · before 5.4.259
- linux linux kernel5.5 and later · before 5.10.199
- linux linux kernel5.11 and later · before 5.15.137
- linux linux kernel5.16 and later · before 6.1.60
- linux linux kernel6.2 and later · before 6.5.9
- linux linux kernel6.6
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Google). Independent of NVD's CPE analysis and usually ahead of it.
Linux Kernel
- 4.4 and later · before 6.6affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:8 | bpftool | before 4.18.0-513.18.1.el8_9 | 4.18.0-513.18.1.el8_9 |
| AlmaLinux:8 | kernel | before 4.18.0-513.18.1.el8_9 | 4.18.0-513.18.1.el8_9 |
| AlmaLinux:8 | kernel-abi-stablelists | before 4.18.0-513.18.1.el8_9 | 4.18.0-513.18.1.el8_9 |
| AlmaLinux:8 | kernel-core | before 4.18.0-513.18.1.el8_9 | 4.18.0-513.18.1.el8_9 |
| AlmaLinux:8 | kernel-cross-headers | before 4.18.0-513.18.1.el8_9 | 4.18.0-513.18.1.el8_9 |
| AlmaLinux:8 | kernel-debug | before 4.18.0-513.18.1.el8_9 | 4.18.0-513.18.1.el8_9 |
| AlmaLinux:8 | kernel-debug-core | before 4.18.0-513.18.1.el8_9 | 4.18.0-513.18.1.el8_9 |
| AlmaLinux:8 | kernel-debug-devel | before 4.18.0-513.18.1.el8_9 | 4.18.0-513.18.1.el8_9 |
| AlmaLinux:8 | kernel-debug-modules | before 4.18.0-513.18.1.el8_9 | 4.18.0-513.18.1.el8_9 |
| AlmaLinux:8 | kernel-debug-modules-extra | before 4.18.0-513.18.1.el8_9 | 4.18.0-513.18.1.el8_9 |
| AlmaLinux:8 | kernel-devel | before 4.18.0-513.18.1.el8_9 | 4.18.0-513.18.1.el8_9 |
| AlmaLinux:8 | kernel-doc | before 4.18.0-513.18.1.el8_9 | 4.18.0-513.18.1.el8_9 |
| AlmaLinux:8 | kernel-modules | before 4.18.0-513.18.1.el8_9 | 4.18.0-513.18.1.el8_9 |
| AlmaLinux:8 | kernel-modules-extra | before 4.18.0-513.18.1.el8_9 | 4.18.0-513.18.1.el8_9 |
| AlmaLinux:8 | kernel-tools | before 4.18.0-513.18.1.el8_9 | 4.18.0-513.18.1.el8_9 |
| AlmaLinux:8 | kernel-tools-libs | before 4.18.0-513.18.1.el8_9 | 4.18.0-513.18.1.el8_9 |
| AlmaLinux:8 | kernel-tools-libs-devel | before 4.18.0-513.18.1.el8_9 | 4.18.0-513.18.1.el8_9 |
| AlmaLinux:8 | kernel-zfcpdump | before 4.18.0-513.18.1.el8_9 | 4.18.0-513.18.1.el8_9 |
| AlmaLinux:8 | kernel-zfcpdump-core | before 4.18.0-513.18.1.el8_9 | 4.18.0-513.18.1.el8_9 |
| AlmaLinux:8 | kernel-zfcpdump-devel | before 4.18.0-513.18.1.el8_9 | 4.18.0-513.18.1.el8_9 |
| AlmaLinux:8 | kernel-zfcpdump-modules | before 4.18.0-513.18.1.el8_9 | 4.18.0-513.18.1.el8_9 |
| AlmaLinux:8 | kernel-zfcpdump-modules-extra | before 4.18.0-513.18.1.el8_9 | 4.18.0-513.18.1.el8_9 |
| AlmaLinux:8 | perf | before 4.18.0-513.18.1.el8_9 | 4.18.0-513.18.1.el8_9 |
| AlmaLinux:8 | python3-perf | before 4.18.0-513.18.1.el8_9 | 4.18.0-513.18.1.el8_9 |
+96
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV90Now
- CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
Published before and after this one in the same product
- ← EarlierCVE-2023-5633Oct 23, 2023 · Kernel: vmwgfx: reference count issue leads to use-after-free in surface handling31Monitor
- ← EarlierCVE-2023-43506Oct 25, 2023 · Local Privilege Escalation in ClearPass OnGuard Linux Agent31Monitor
- Later →CVE-2023-46813Oct 26, 2023 · An issue was discovered in the Linux kernel before 6.5.9, exploitable by local users with userspace access to MMIO registers.28Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| almalinux:bpftool | 4.18.0-513.18.1.el8_9 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel | 4.18.0-513.18.1.el8_9 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-abi-stablelists | 4.18.0-513.18.1.el8_9 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-core | 4.18.0-513.18.1.el8_9 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-cross-headers | 4.18.0-513.18.1.el8_9 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-debug | 4.18.0-513.18.1.el8_9 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-debug-core | 4.18.0-513.18.1.el8_9 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-debug-devel | 4.18.0-513.18.1.el8_9 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-debug-modules | 4.18.0-513.18.1.el8_9 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-debug-modules-extra | 4.18.0-513.18.1.el8_9 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-devel | 4.18.0-513.18.1.el8_9 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-doc | 4.18.0-513.18.1.el8_9 · AlmaLinux:8 | Package registry (OSV) |
| debian:linux | 6.1.64-1 · Debian:12 | Package registry (OSV) |
| debian:linux-5.10 | 5.10.205-2~deb10u1 · Debian:10 | Package registry (OSV) |
| opensuse:dtb-aarch64 | 5.14.21-150500.55.39.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| opensuse:kernel-64kb | 5.14.21-150500.55.39.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| opensuse:kernel-debug | 5.14.21-150500.55.39.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| opensuse:kernel-default | 5.14.21-150500.55.39.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| opensuse:kernel-default-base | 5.14.21-150500.55.39.1.150500.6.17.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| opensuse:kernel-docs | 5.14.21-150500.55.39.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| opensuse:kernel-kvmsmall | 5.14.21-150500.55.39.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| opensuse:kernel-obs-build | 5.14.21-150500.55.39.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| opensuse:kernel-obs-qa | 5.14.21-150500.55.39.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| opensuse:kernel-source | 5.14.21-150500.55.39.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| opensuse:kernel-syms | 5.14.21-150500.55.39.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| opensuse:kernel-zfcpdump | 5.14.21-150500.55.39.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| red hat:kernel-rt | 0:4.18.0-513.18.1.rt7.320.el8_9 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| red hat:kernel-rt-core | 0:4.18.0-513.18.1.rt7.320.el8_9 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug | 0:4.18.0-513.18.1.rt7.320.el8_9 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug-core | 0:4.18.0-513.18.1.rt7.320.el8_9 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
+21
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Proof-of-concept repository on GitHub ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Proof-of-concept repository on GitHub | stars:0 | 2024-01-23 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- Published
- First PoC+89 d
- TodayNov 6, 2026+1107 d
No history yet (it accumulates with the daily EPSS job).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
- Budimir Markovicfinder
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-787 · Out-of-bounds WriteCVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (7 more)Show less
- kernel.dance/32671e3799ca2e4590773fd0e63aaa4229e50c06
- lists.debian.org/debian-lts-announce/2024/01/msg00004.html
- lists.debian.org/debian-lts-announce/2024/01/msg00005.html
- cert-portal.siemens.com/productcert/html/ssa-398330.html
- cert-portal.siemens.com/productcert/html/ssa-613116.html
- cert-portal.siemens.com/productcert/html/ssa-769027.html
- cert-portal.siemens.com/productcert/html/ssa-794697.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.