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Review reviewHigh

CVE-2024-26782

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix double-free on socket dismantle when MPTCP server accepts an incoming connection, it clones its listener socket. However, the pointer to 'inet_opt' for the new socket has the same value as the original one: as a consequence, on program exit it's possible to observe the following splat: BUG: KASAN: double-free in inet_sock_destruct+0x54f/0x8b0 Free of addr ffff888485950880 by task swapper/25/0 CPU: 25 PID: 0 Comm: swapper/25 Kdump: loaded Not tainted 6.8.0-rc1+ #609 Hardware name: Supermicro SYS-6027R-72RF/X9DRH-7...

CVSS
7.8
EPSS
0.71%
50.2% percentile
CISA KEV
Not listed
Published
2024.04.04
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.71%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix double-free on socket dismantle when MPTCP server accepts an incoming connection, it clones its listener socket. However, the pointer to 'inet_opt' for the new socket has the same value as the original one: as a consequence, on program exit it's possible to observe the following splat: BUG: KASAN: double-free in inet_sock_destruct+0x54f/0x8b0 Free of addr ffff888485950880 by task swapper/25/0 CPU: 25 PID: 0 Comm: swapper/25 Kdump: loaded Not tainted 6.8.0-rc1+ #609 Hardware name: Supermicro SYS-6027R-72RF/X9DRH-7...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= cf7da0d66cc1a2a19fc5930bb746ffbb2d4cd1be < f74362a004225df935863dea6eb7d82daaa5b16e, >= cf7da0d66cc1a2a19fc5930bb746ffbb2d4cd1be < 4a4eeb6912538c2d0b158e8d11b62d96c1dada4e, >= cf7da0d66cc1a2a19fc5930bb746ffbb2d4cd1be < d93fd40c62397326046902a2c5cb75af50882a85, >= cf7da0d66cc1a2a19fc5930bb746ffbb2d4cd1be < ce0809ada38dca8d6d41bb57ab40494855c30582, >= cf7da0d66cc1a2a19fc5930bb746ffbb2d4cd1be < 85933e80d077c9ae2227226beb86c22f464059cc, >= cf7da0d66cc1a2a19fc5930bb746ffbb2d4cd1be < 10048689def7e40a4405acda16fdc6477d4ecc5c, >= 5.6, >= 5.6 < 5.10.212, >= 5.11 < 5.15.151, >= 5.16 < 6.1.81, >= 6.2 < 6.6.21, >= 6.7 < 6.7.9, 6.8
Fixed versions
5.10.212, 5.15.151, 6.1.81, 6.6.21, 6.7.9

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-415
CVE-2024-26782 — Linux Linux, linux kernel | SECUFOCUS NOW