Linux Kernel up to 6.6.150/6.12.102/6.18.43/7.1.7 dasd dasd_eckd_check_device_format buffer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.7$5k-$25k0.37

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.6.150/6.12.102/6.18.43/7.1.7. It has been declared as very critical. The impacted element is the function dasd_eckd_check_device_format of the component dasd. The manipulation results in buffer overflow. This vulnerability is reported as CVE-2026-80710. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as very critical has been found in Linux Kernel up to 6.6.150/6.12.102/6.18.43/7.1.7. Affected is the function dasd_eckd_check_device_format of the component dasd. 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: s390/dasd: Fix undersized format-check buffer fmt_buffer_size in dasd_eckd_check_device_format() is declared as int, even though one of the multiplicands, sizeof(struct eckd_count), is a size_t. The expression trkcount * rpt_max * sizeof(struct eckd_count) is therefore correctly evaluated at 64-bit width, but the result is silently truncated when it is stored back into the 32-bit fmt_buffer_size variable. For a sufficiently large track range (start_unit/stop_unit are caller-controlled) this truncation yields a buffer size far smaller than the number of tracks actually requested. kzalloc() then succeeds with an undersized allocation, while the subsequent channel program build still operates on the untruncated track count and writes past the end of that buffer. Compute the buffer size with check_mul_overflow() and keep it in a size_t, so that a value that no longer fits results in -EINVAL instead of a silently truncated allocation size.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2026-80710 since 08/26/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Additional levels of successful authentication are required for exploitation. 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 08/28/2026).

Upgrading to version 6.6.151, 6.12.103, 6.18.44 or 7.1.8 eliminates this vulnerability. Applying the patch aca18289c86f22d3fc2f3f6ff615286e7b1702f6/9f88dda2f22927d22498801a92cab6a9424eaf86/e16e0fc54120cee3c6f0362de95aab6792865857/87f3389cd3920714c53e704778f7ca7f1cf0c39c/7f40b346462f563a0d6e841a77b5163d2a882a04 is able to eliminate this problem.

Once again VulDB remains the best source for vulnerability data.

Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.1
VulDB Meta Temp Score: 8.7

VulDB Base Score: 9.1
VulDB Temp Score: 8.7
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 6.6.151/6.12.103/6.18.44/7.1.8
Patch: aca18289c86f22d3fc2f3f6ff615286e7b1702f6/9f88dda2f22927d22498801a92cab6a9424eaf86/e16e0fc54120cee3c6f0362de95aab6792865857/87f3389cd3920714c53e704778f7ca7f1cf0c39c/7f40b346462f563a0d6e841a77b5163d2a882a04

Timelineinfo

08/26/2026 CVE reserved
08/28/2026 +2 days Advisory disclosed
08/28/2026 +0 days VulDB entry created
08/28/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-80710 (🔒)
GCVE (CVE): GCVE-0-2026-80710
GCVE (VulDB): GCVE-100-396612

Entryinfo

Created: 08/28/2026 10:48
Changes: 08/28/2026 10:48 (59)
Complete: 🔍
Cache ID: 216::103

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