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Review reviewHigh

CVE-2024-26890

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btrtl: fix out of bounds memory access The problem is detected by KASAN. btrtl driver uses private hci data to store 'struct btrealtek_data'. If btrtl driver is used with btusb, then memory for private hci data is allocated in btusb. But no private data is allocated after hci_dev, when btrtl is used with hci_h5. This commit adds memory allocation for hci_h5 case. ================================================================== BUG: KASAN: slab-out-of-bounds in btrtl_initialize+0x6cc/0x958 [btrtl] Write of size...

CVSS
7.8
EPSS
0.60%
45.4% percentile
CISA KEV
Not listed
Published
2024.04.17
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.60%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btrtl: fix out of bounds memory access The problem is detected by KASAN. btrtl driver uses private hci data to store 'struct btrealtek_data'. If btrtl driver is used with btusb, then memory for private hci data is allocated in btusb. But no private data is allocated after hci_dev, when btrtl is used with hci_h5. This commit adds memory allocation for hci_h5 case. ================================================================== BUG: KASAN: slab-out-of-bounds in btrtl_initialize+0x6cc/0x958 [btrtl] Write of size...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 5b355944b19011011dd3fd4187444c5ff1d76ad2 < dd163fa34c483f1674aa2510accce11a224f649e, >= 5b355944b19011011dd3fd4187444c5ff1d76ad2 < 2f232bc389a4f5943c40733582f9edf77b89e499, >= 5b355944b19011011dd3fd4187444c5ff1d76ad2 < 0c657e641df1e77d6087688190f632cad9c0439b, >= 5b355944b19011011dd3fd4187444c5ff1d76ad2 < de4e88ec58c4202efd1f02eebb4939bbf6945358, >= 6.2, >= 6.2 < 6.6.23, >= 6.7 < 6.7.11, >= 6.8 < 6.8.2
Fixed versions
6.6.23, 6.7.11, 6.8.2

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-125
CVE-2024-26890 — Linux Linux, linux kernel | SECUFOCUS NOW