RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv rxe_rcv() currently checks only that the incoming packet is at least header_size(pkt) bytes long before payload_size() is used. However, payload_size() subtracts both the attacker-controlled BTH pad field and RXE_ICRC_SIZE from pkt->paylen: payload_size = pkt->paylen - offset[RXE_PAYLOAD] - bth_pad(pkt) - RXE_ICRC_SIZE This means a short packet can still make payload_size() underflow even if it includes enough bytes for the fixed headers. Simply requiring header_size(pkt) + RXE_ICRC_SIZE is not sufficient either, because a packet with a forged non-zero BTH pad can still leave payload_size() negative and pass an underflowed value to later receive-path users. Fix this by validating pkt->paylen against the full minimum length required by payload_size(): header_size(pkt) + bth_pad(pkt) + RXE_ICRC_SIZE.
Noroxi analysis
No Noroxi analysis for this record yet
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We use this product, ask for help- Published
- May 27, 2026
- Updated
- Aug 5, 2026
- EPSS
- 0.5% · 41th percentile
- CWE
- —
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Report tools
Action score
36
Monitor
Low priority for now.
- CVSS
- 36 / 40 · 9.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.5%
CNA vs NVD score
- NVD
- —
- CNA · Linux
- 9.1
- NVD has not scored this yet; the score shown is the CNA’s.
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 |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- linux linux kernel4.8 and later · before 5.10.258
- linux linux kernel5.11 and later · before 5.15.209
- linux linux kernel5.16 and later · before 6.1.175
- linux linux kernel6.2 and later · before 6.6.140
- linux linux kernel6.7 and later · before 6.12.86
- linux linux kernel6.13 and later · before 6.18.27
- linux linux kernel6.19 and later · before 7.0.4
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.
Linux Linux
- 4.8affected
- 8700e3e7c4857d28ebaa824509934556da0b3e76 and later · before c4376c672c3648d5bdc31dfffc329d07164f93c4affected · git
- 8700e3e7c4857d28ebaa824509934556da0b3e76 and later · before 5fedefec757192dcaad29a664ac332c7601be144affected · git
- 8700e3e7c4857d28ebaa824509934556da0b3e76 and later · before 2c0d71ef12f46c57d37bc571f3f2797db7eb50ccaffected · git
- 8700e3e7c4857d28ebaa824509934556da0b3e76 and later · before 2fd4f8b749309a61c3f3f88ee8891d94f79e1240affected · git
- 8700e3e7c4857d28ebaa824509934556da0b3e76 and later · before f83519a4c122c9c7a850a2197648a9ff4c67c520affected · git
- 8700e3e7c4857d28ebaa824509934556da0b3e76 and later · before 9b924f3a26b21330a837cfe72e819b6393bbeeaaaffected · git
- 8700e3e7c4857d28ebaa824509934556da0b3e76 and later · before e8ee0e792d475b1067c199ef0af1b6221fa6f43daffected · git
- 8700e3e7c4857d28ebaa824509934556da0b3e76 and later · before 7244491dab347f648e661da96dc0febadd9daec3affected · git
- before 4.8not affected · semver
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 4.18.0-553.166.1.el8_10 | 4.18.0-553.166.1.el8_10 |
| AlmaLinux:8 | kernel | before 4.18.0-553.166.1.el8_10 | 4.18.0-553.166.1.el8_10 |
| AlmaLinux:8 | kernel-abi-stablelists | before 4.18.0-553.166.1.el8_10 | 4.18.0-553.166.1.el8_10 |
| AlmaLinux:8 | kernel-core | before 4.18.0-553.166.1.el8_10 | 4.18.0-553.166.1.el8_10 |
| AlmaLinux:8 | kernel-cross-headers | before 4.18.0-553.166.1.el8_10 | 4.18.0-553.166.1.el8_10 |
| AlmaLinux:8 | kernel-debug | before 4.18.0-553.166.1.el8_10 | 4.18.0-553.166.1.el8_10 |
| AlmaLinux:8 | kernel-debug-core | before 4.18.0-553.166.1.el8_10 | 4.18.0-553.166.1.el8_10 |
| AlmaLinux:8 | kernel-debug-devel | before 4.18.0-553.166.1.el8_10 | 4.18.0-553.166.1.el8_10 |
| AlmaLinux:8 | kernel-debug-modules | before 4.18.0-553.166.1.el8_10 | 4.18.0-553.166.1.el8_10 |
| AlmaLinux:8 | kernel-debug-modules-extra | before 4.18.0-553.166.1.el8_10 | 4.18.0-553.166.1.el8_10 |
| AlmaLinux:8 | kernel-devel | before 4.18.0-553.166.1.el8_10 | 4.18.0-553.166.1.el8_10 |
| AlmaLinux:8 | kernel-doc | before 4.18.0-553.166.1.el8_10 | 4.18.0-553.166.1.el8_10 |
| AlmaLinux:8 | kernel-headers | before 4.18.0-553.166.1.el8_10 | 4.18.0-553.166.1.el8_10 |
| AlmaLinux:8 | kernel-modules | before 4.18.0-553.166.1.el8_10 | 4.18.0-553.166.1.el8_10 |
| AlmaLinux:8 | kernel-modules-extra | before 4.18.0-553.166.1.el8_10 | 4.18.0-553.166.1.el8_10 |
| AlmaLinux:8 | kernel-rt | before 4.18.0-553.166.1.rt7.507.el8_10 | 4.18.0-553.166.1.rt7.507.el8_10 |
| AlmaLinux:8 | kernel-rt-core | before 4.18.0-553.166.1.rt7.507.el8_10 | 4.18.0-553.166.1.rt7.507.el8_10 |
| AlmaLinux:8 | kernel-rt-debug | before 4.18.0-553.166.1.rt7.507.el8_10 | 4.18.0-553.166.1.rt7.507.el8_10 |
| AlmaLinux:8 | kernel-rt-debug-core | before 4.18.0-553.166.1.rt7.507.el8_10 | 4.18.0-553.166.1.rt7.507.el8_10 |
| AlmaLinux:8 | kernel-rt-debug-devel | before 4.18.0-553.166.1.rt7.507.el8_10 | 4.18.0-553.166.1.rt7.507.el8_10 |
| AlmaLinux:8 | kernel-rt-debug-modules | before 4.18.0-553.166.1.rt7.507.el8_10 | 4.18.0-553.166.1.rt7.507.el8_10 |
| AlmaLinux:8 | kernel-rt-debug-modules-extra | before 4.18.0-553.166.1.rt7.507.el8_10 | 4.18.0-553.166.1.rt7.507.el8_10 |
| AlmaLinux:8 | kernel-rt-devel | before 4.18.0-553.166.1.rt7.507.el8_10 | 4.18.0-553.166.1.rt7.507.el8_10 |
| AlmaLinux:8 | kernel-rt-modules | before 4.18.0-553.166.1.rt7.507.el8_10 | 4.18.0-553.166.1.rt7.507.el8_10 |
+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 | 2c0d71ef12f46c57d37bc571f3f2797db7eb50cc | Vendor (CNA) |
| Linux Linux | 2fd4f8b749309a61c3f3f88ee8891d94f79e1240 | Vendor (CNA) |
| Linux Linux | 5fedefec757192dcaad29a664ac332c7601be144 | Vendor (CNA) |
| Linux Linux | 7244491dab347f648e661da96dc0febadd9daec3 | Vendor (CNA) |
| Linux Linux | 9b924f3a26b21330a837cfe72e819b6393bbeeaa | Vendor (CNA) |
| Linux Linux | c4376c672c3648d5bdc31dfffc329d07164f93c4 | Vendor (CNA) |
| Linux Linux | e8ee0e792d475b1067c199ef0af1b6221fa6f43d | Vendor (CNA) |
| Linux Linux | f83519a4c122c9c7a850a2197648a9ff4c67c520 | Vendor (CNA) |
| almalinux:kernel | 5.14.0-687.49.1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k | 5.14.0-687.49.1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-core | 5.14.0-687.49.1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug | 5.14.0-687.49.1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-core | 5.14.0-687.49.1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-devel | 5.14.0-687.49.1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-devel-matched | 5.14.0-687.49.1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-modules | 5.14.0-687.49.1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-modules-core | 5.14.0-687.49.1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-modules-extra | 5.14.0-687.49.1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-devel | 5.14.0-687.49.1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-devel-matched | 5.14.0-687.49.1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| debian:linux | 6.1.176-1 · Debian:12 | Package registry (OSV) |
| red hat:kernel-64k-debug-debuginfo | 0:5.14.0-687.49.1.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-debug-devel | 0:5.14.0-687.49.1.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-debug-devel-matched | 0:5.14.0-687.49.1.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-debuginfo | 0:5.14.0-687.49.1.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-devel | 0:5.14.0-687.49.1.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-devel-matched | 0:5.14.0-687.49.1.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-debug-debuginfo | 0:5.14.0-687.49.1.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-debug-devel | 0:5.14.0-687.49.1.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-debug-devel-matched | 0:5.14.0-687.49.1.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
+17
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
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.
No dated events beyond publication.
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
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
—
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
nvd-secondary
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
- git.kernel.org/stable/c/2c0d71ef12f46c57d37bc571f3f2797db7eb50cc
- git.kernel.org/stable/c/2fd4f8b749309a61c3f3f88ee8891d94f79e1240
- git.kernel.org/stable/c/5fedefec757192dcaad29a664ac332c7601be144
- git.kernel.org/stable/c/7244491dab347f648e661da96dc0febadd9daec3
- git.kernel.org/stable/c/9b924f3a26b21330a837cfe72e819b6393bbeeaa
- git.kernel.org/stable/c/c4376c672c3648d5bdc31dfffc329d07164f93c4
- git.kernel.org/stable/c/e8ee0e792d475b1067c199ef0af1b6221fa6f43d
- git.kernel.org/stable/c/f83519a4c122c9c7a850a2197648a9ff4c67c520
Vendor advisories and official records. Exploit/PoC links are deliberately left out.