Incorrect indirect branch prediction barrier in the Linux Kernel
The current implementation of the prctl syscall does not issue an IBPB immediately during the syscall. The ib_prctl_set function updates the Thread Information Flags (TIFs) for the task and updates the SPEC_CTRL MSR on the function __speculation_ctrl_update, but the IBPB is only issued on the next schedule, when the TIF bits are checked. This leaves the victim vulnerable to values already injected on the BTB, prior to the prctl syscall. The patch that added the support for the conditional mitigation via prctl (ib_prctl_set) dates back to the kernel 4.9.176. We recommend upgrading past commit a664ec9158eeddd75121d39c9a0758016097fa96
- BDU:2023-00749
- DLA-3403-1
- DLA-3404-1
- openSUSE-SU-2024:12697-1
- SUSE-SU-2023:0485-1
- SUSE-SU-2023:0488-1
- SUSE-SU-2023:0618-1
- SUSE-SU-2023:0634-1
- SUSE-SU-2023:0768-1
- SUSE-SU-2023:0774-1
- SUSE-SU-2023:0778-1
- SUSE-SU-2023:0779-1
- SUSE-SU-2023:0780-1
- SUSE-SU-2023:0852-1
- SUSE-SU-2023:1608-1
- SUSE-SU-2023:1710-1
- SUSE-SU-2023:2646-1
- SUSE-SU-2023:2809-1
- SUSE-SU-2023:2871-1
- Published
- Apr 25, 2023
- Updated
- Jun 17, 2026
- EPSS
- 2.4% · 83th percentile
- CWE
- CWE-610
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Report tools
Action score
31
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 2.4%
CISA SSVC decision
- Exploitation
- proof of concept
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 7.5
- CNA · Google
- 4.7
- 2.8 point gap
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
| netapp | active iq unified manager | cpe:2.3:a:netapp:active_iq_unified_manager |
| netapp | h300s firmware | cpe:2.3:o:netapp:h300s_firmware |
| netapp | h300s | cpe:2.3:h:netapp:h300s |
| netapp | h500s firmware | cpe:2.3:o:netapp:h500s_firmware |
| netapp | h500s | cpe:2.3:h:netapp:h500s |
| netapp | h700s firmware | cpe:2.3:o:netapp:h700s_firmware |
| netapp | h700s | cpe:2.3:h:netapp:h700s |
| netapp | h410s firmware | cpe:2.3:o:netapp:h410s_firmware |
| netapp | h410s | cpe:2.3:h:netapp:h410s |
| netapp | h410c firmware | cpe:2.3:o:netapp:h410c_firmware |
and 1 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- debian debian linux10.0
- linux linux kernel4.4.180 and later · before 4.5
- linux linux kernel4.9.176 and later · before 4.10
- linux linux kernel4.14.86 and later · before 4.14.303
- linux linux kernel4.19.7 and later · before 4.19.270
- linux linux kernel4.20 and later · before 5.4.229
- linux linux kernel5.5.0 and later · before 5.10.163
- linux linux kernel5.11 and later · before 5.15.87
- linux linux kernel5.16 and later · before 6.0.19
- linux linux kernel6.1 and later · before 6.1.5
- linux linux kernel3.16.68 and later · before 3.17
- netapp active iq unified managerall versions
- netapp h300s firmwareall versions
- netapp h410c firmwareall versions
- netapp h410s firmwareall versions
- netapp h500s firmwareall versions
- netapp h700s firmwareall versions
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 Linux Kernel
- 9137bb27e60e and later · before a664ec9158eeddd75121d39c9a0758016097fa96affected · git
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:10 | linux | before 4.19.282-1 | 4.19.282-1 |
| Debian:10 | linux-5.10 | before 5.10.178-3~deb10u1 | 5.10.178-3~deb10u1 |
| Debian:12 | linux | before 6.1.7-1 | 6.1.7-1 |
| openSUSE:Leap 15.4 | dtb-aarch64 | before 5.3.18-150300.59.115.1 | 5.3.18-150300.59.115.1 |
| openSUSE:Leap 15.4 | dtb-aarch64 | before 5.14.21-150400.24.55.1 | 5.14.21-150400.24.55.1 |
| openSUSE:Leap 15.4 | kernel-debug | before 5.14.21-150400.24.55.3 | 5.14.21-150400.24.55.3 |
| openSUSE:Leap 15.4 | kernel-debug | before 4.12.14-150100.197.137.2 | 4.12.14-150100.197.137.2 |
| openSUSE:Leap 15.4 | kernel-kvmsmall | before 4.12.14-150100.197.137.2 | 4.12.14-150100.197.137.2 |
| openSUSE:Leap 15.4 | kernel-kvmsmall | before 5.14.21-150400.24.55.3 | 5.14.21-150400.24.55.3 |
| openSUSE:Leap 15.4 | kernel-obs-qa | before 5.14.21-150400.24.55.1 | 5.14.21-150400.24.55.1 |
| openSUSE:Leap 15.4 | kernel-vanilla | before 4.12.14-150100.197.137.2 | 4.12.14-150100.197.137.2 |
| openSUSE:Leap 15.5 | dtb-aarch64 | before 5.14.21-150500.55.7.1 | 5.14.21-150500.55.7.1 |
| openSUSE:Leap 15.5 | kernel-debug | before 5.14.21-150500.55.7.1 | 5.14.21-150500.55.7.1 |
| openSUSE:Leap 15.5 | kernel-kvmsmall | before 5.14.21-150500.55.7.1 | 5.14.21-150500.55.7.1 |
| openSUSE:Leap 15.5 | kernel-obs-qa | before 5.14.21-150500.55.7.1 | 5.14.21-150500.55.7.1 |
| openSUSE:Tumbleweed | kernel-source | before 6.1.12-1.1 | 6.1.12-1.1 |
| SUSE:Linux Enterprise High Availability Extension 12 SP5 | kernel-default | before 4.12.14-122.150.1 | 4.12.14-122.150.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS | kernel-docs | before 4.12.14-150100.197.137.2 | 4.12.14-150100.197.137.2 |
| SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS | kernel-docs | before 4.12.14-150100.197.137.2 | 4.12.14-150100.197.137.2 |
| SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS | kernel-obs-build | before 4.12.14-150100.197.137.2 | 4.12.14-150100.197.137.2 |
| SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS | kernel-obs-build | before 4.12.14-150100.197.137.2 | 4.12.14-150100.197.137.2 |
| SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS | kernel-source | before 4.12.14-150100.197.137.2 | 4.12.14-150100.197.137.2 |
| SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS | kernel-source | before 4.12.14-150100.197.137.2 | 4.12.14-150100.197.137.2 |
| SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS | kernel-syms | before 4.12.14-150100.197.137.2 | 4.12.14-150100.197.137.2 |
+96
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- 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
- CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV83Now
- CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV77This week
- CVE-2013-6282The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addKEV77This week
- CVE-2013-2094The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows loKEV77This week
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 |
|---|---|---|
| Linux Linux Kernel | a664ec9158eeddd75121d39c9a0758016097fa96 | Vendor (CNA) |
| debian:linux | 6.1.7-1 · Debian:12 | Package registry (OSV) |
| debian:linux-5.10 | 5.10.178-3~deb10u1 · Debian:10 | Package registry (OSV) |
| opensuse:kernel-rt | 5.14.21-150400.15.11.1 · openSUSE:Leap Micro 5.3 | Package registry (OSV) |
| opensuse:kernel-rt_debug | 5.14.21-150400.15.11.1 · openSUSE:Leap 15.4 | Package registry (OSV) |
| opensuse:kernel-source-rt | 5.14.21-150400.15.11.1 · openSUSE:Leap 15.4 | Package registry (OSV) |
| opensuse:kernel-syms-rt | 5.14.21-150400.15.11.1 · openSUSE:Leap 15.4 | Package registry (OSV) |
| suse:kernel-azure | 4.12.14-16.124.1 · SUSE:Linux Enterprise Server 12 SP5 | Package registry (OSV) |
| suse:kernel-default | 4.12.14-150100.197.137.2 · SUSE:Linux Enterprise Live Patching 15 SP1 | Package registry (OSV) |
| suse:kernel-docs | 4.12.14-150100.197.137.2 · SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS | Package registry (OSV) |
| suse:kernel-livepatch-SLE15-SP1_Update_38 | 1-150100.3.3.2 · SUSE:Linux Enterprise Live Patching 15 SP1 | Package registry (OSV) |
| suse:kernel-livepatch-SLE15-SP4-RT_Update_3 | 1-150400.1.3.1 · SUSE:Linux Enterprise Live Patching 15 SP4 | Package registry (OSV) |
| suse:kernel-rt | 4.12.14-10.115.1 · SUSE:Linux Enterprise Real Time 12 SP5 | Package registry (OSV) |
| suse:kernel-rt | 5.14.21-150400.15.11.1 · SUSE:Linux Enterprise Micro 5.3 | Package registry (OSV) |
| suse:kernel-rt_debug | 4.12.14-10.115.1 · SUSE:Linux Enterprise Real Time 12 SP5 | Package registry (OSV) |
| suse:kernel-rt_debug | 5.14.21-150400.15.11.1 · SUSE:Real Time Module 15 SP4 | Package registry (OSV) |
| suse:kernel-source-azure | 4.12.14-16.124.1 · SUSE:Linux Enterprise Server 12 SP5 | Package registry (OSV) |
| suse:kernel-source-rt | 4.12.14-10.115.1 · SUSE:Linux Enterprise Real Time 12 SP5 | Package registry (OSV) |
| suse:kernel-source-rt | 5.14.21-150400.15.11.1 · SUSE:Real Time Module 15 SP4 | Package registry (OSV) |
| suse:kernel-syms-azure | 4.12.14-16.124.1 · SUSE:Linux Enterprise Server 12 SP5 | Package registry (OSV) |
| suse:kernel-syms-rt | 4.12.14-10.115.1 · SUSE:Linux Enterprise Real Time 12 SP5 | Package registry (OSV) |
| suse:kernel-syms-rt | 5.14.21-150400.15.11.1 · SUSE:Real Time Module 15 SP4 | Package registry (OSV) |
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 ×2
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:3 | 2023-02-04 |
| Proof-of-concept repository on GitHub | stars:14 | 2023-02-07 |
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.
- First PoC-81 d
- Published
- TodaySep 30, 2026+1254 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
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
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- none
- Availability
- none
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
CWE-610 · Externally Controlled Reference to a Resource in Another SphereCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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.
Attack patterns (CAPEC)
ATT&CK techniques
—
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.kernel.org/tip/a664ec9158eeddd75121d39c9a0758016097fa96
- lists.debian.org/debian-lts-announce/2023/05/msg00005.html
- lists.debian.org/debian-lts-announce/2023/05/msg00006.html
- security.netapp.com/advisory/ntap-20230714-0001/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.