Linux Kernel up to 7.3-rc3 mvpp2 mvpp2_bm_switch_buffers buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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9.5$5k-$25k0.26

Summaryinfo

A vulnerability labeled as very critical has been found in Linux Kernel up to 7.3-rc3. Affected by this issue is the function mvpp2_bm_switch_buffers of the component mvpp2. The manipulation results in buffer overflow. This vulnerability was named CVE-2026-98272. The attack may be performed from remote. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as very critical, was found in Linux Kernel up to 7.3-rc3. Affected is the function mvpp2_bm_switch_buffers of the component mvpp2. The manipulation with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: net: mvpp2: prevent buffer overflow in page_pool allocation The per‑processor buffering scheme is supported only if the number of pools (nrxqs * 2) does not exceed MVPP2_BM_MAX_POOLS (8). This is already checked in mvpp2_probe() during the initial activation of percpu_pools. However, mvpp2_change_mtu() may later call mvpp2_bm_switch_buffers(priv, true) without this check, which can lead to an out-of-bounds access in the priv->page_pool array in mvpp2_bm_init(). The array is sized to hold MVPP2_PORT_MAX_RXQ entries, and mvpp2_get_nrxqs() may return exactly that value. The per-CPU scheme then doubles it to nrxqs * 2, exceeding the array bounds. Check that the hardware version is MVPP22 or newer and that the number of pools (nrxqs * 2) does not exceed MVPP2_BM_MAX_POOLS before switching to per-CPU mode. Found by Linux Verification Center (linuxtesting.org) with SVACE.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2026-98272 since 09/25/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 10/06/2026).

Upgrading to version 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.112, 6.18.54, 7.2.8 or 7.3-rc4 eliminates this vulnerability. Applying the patch 5cefdb7acfc646fbded59ae77dfe0aac4c9e4a3c/4ac1d5adc4f4dbafbfd270b55cc6d8bf9849d545/dfd46b5584a5881b131008767950e1ab82713c8c/6569fd85b0ef9a8a6f20b7eb868420b8c7c0c2a0/e7f30dcfa6c64033bf9137362517bd248e5be384/f0e7d62c1eb984dd204095118973c59604144cd8/1734c3fc0066e228ce1c11e434b7c2527f0a949a/14cb1e7702e5cb3c58888f6aed498381a73927d2 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.5

VulDB Base Score: 10.0
VulDB Temp Score: 9.5
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: Buffer overflow
CWE: CWE-120 / CWE-119
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 5.10.271/5.15.222/6.1.189/6.6.158/6.12.112/6.18.54/7.2.8/7.3-rc4
Patch: 5cefdb7acfc646fbded59ae77dfe0aac4c9e4a3c/4ac1d5adc4f4dbafbfd270b55cc6d8bf9849d545/dfd46b5584a5881b131008767950e1ab82713c8c/6569fd85b0ef9a8a6f20b7eb868420b8c7c0c2a0/e7f30dcfa6c64033bf9137362517bd248e5be384/f0e7d62c1eb984dd204095118973c59604144cd8/1734c3fc0066e228ce1c11e434b7c2527f0a949a/14cb1e7702e5cb3c58888f6aed498381a73927d2

Timelineinfo

09/25/2026 CVE reserved
10/06/2026 +11 days Advisory disclosed
10/06/2026 +0 days VulDB entry created
10/06/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-98272 (🔒)
GCVE (CVE): GCVE-0-2026-98272
GCVE (VulDB): GCVE-100-414228

Entryinfo

Created: 10/06/2026 13:51
Changes: 10/06/2026 13:51 (59)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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