Linux Kernel up to 7.1.4 mlx5 set_rq_size rq_wqe_shift integer overflow

CVSS Meta Temp Score
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CTI Interest Score
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8.6$5k-$25k1.40

Summaryinfo

A vulnerability was found in Linux Kernel up to 7.1.4. It has been classified as very critical. This affects the function set_rq_size of the component mlx5. Performing a manipulation of the argument rq_wqe_shift results in integer overflow. This vulnerability is known as CVE-2026-74297. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Linux Kernel up to 7.1.4. It has been classified as very critical. This affects the function set_rq_size of the component mlx5. The manipulation of the argument rq_wqe_shift with an unknown input leads to a integer overflow vulnerability. CWE is classifying the issue as CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Fix undefined shift of user RQ WQE size set_rq_size() computes the RQ WQE size as "1 << rq_wqe_shift" based on the user-provided rq_wqe_shift, which is only checked to be greater than 32, so shifts of 32 are still accepted. A shift of 31 also overflows a signed integer, leading to undefined behavior. Use check_shl_overflow() to compute the RQ WQE size and reject any invalid values.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-74297 since 08/15/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 08/15/2026).

Upgrading to version 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5 or 7.2-rc1 eliminates this vulnerability. Applying the patch 9fff54929cc00849d738faa99f06c32399aeb026/b746f949c2ac2b041102836095d6d4a2ef21fa75/c1dbf52d24a8cb1aa56780ba51b72e7d495f258c/6fc874fdfb366bfb11c62e6af9a831c8be59ddda/42f3d2c8c18b92ea33e506a38b64f1a8986c2823/4b87a2497276a72fd63028e7419abf0fb7ed837b/b732db02a2b04cde393638df19de6251ce62a74e/d881d60223aac8fdc12b227d89c76e131e92a9cd is able to eliminate this problem.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.0
VulDB Meta Temp Score: 8.6

VulDB Base Score: 9.0
VulDB Temp Score: 8.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.261/5.15.212/6.1.178/6.6.145/6.12.97/6.18.40/7.1.5/7.2-rc1
Patch: 9fff54929cc00849d738faa99f06c32399aeb026/b746f949c2ac2b041102836095d6d4a2ef21fa75/c1dbf52d24a8cb1aa56780ba51b72e7d495f258c/6fc874fdfb366bfb11c62e6af9a831c8be59ddda/42f3d2c8c18b92ea33e506a38b64f1a8986c2823/4b87a2497276a72fd63028e7419abf0fb7ed837b/b732db02a2b04cde393638df19de6251ce62a74e/d881d60223aac8fdc12b227d89c76e131e92a9cd

Timelineinfo

08/15/2026 Advisory disclosed
08/15/2026 +0 days CVE reserved
08/15/2026 +0 days VulDB entry created
08/15/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-74297 (🔒)
GCVE (CVE): GCVE-0-2026-74297
GCVE (VulDB): GCVE-100-390255

Entryinfo

Created: 08/15/2026 09:02
Changes: 08/15/2026 09:02 (60)
Complete: 🔍
Cache ID: 216::103

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