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Review reviewHigh

CVE-2024-35932

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: drm/vc4: don't check if plane->state->fb == state->fb Currently, when using non-blocking commits, we can see the following kernel warning: [ 110.908514] ------------[ cut here ]------------ [ 110.908529] refcount_t: underflow; use-after-free. [ 110.908620] WARNING: CPU: 0 PID: 1866 at lib/refcount.c:87 refcount_dec_not_one+0xb8/0xc0 [ 110.908664] Modules linked in: rfcomm snd_seq_dummy snd_hrtimer snd_seq snd_seq_device cmac algif_hash aes_arm64 aes_generic algif_skcipher af_alg bnep hid_logitech_hidpp vc4 brcmfmac hci_uart...

CVSS
7.8
EPSS
0.21%
11.5% percentile
CISA KEV
Not listed
Published
2024.05.19
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.21%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: drm/vc4: don't check if plane->state->fb == state->fb Currently, when using non-blocking commits, we can see the following kernel warning: [ 110.908514] ------------[ cut here ]------------ [ 110.908529] refcount_t: underflow; use-after-free. [ 110.908620] WARNING: CPU: 0 PID: 1866 at lib/refcount.c:87 refcount_dec_not_one+0xb8/0xc0 [ 110.908664] Modules linked in: rfcomm snd_seq_dummy snd_hrtimer snd_seq snd_seq_device cmac algif_hash aes_arm64 aes_generic algif_skcipher af_alg bnep hid_logitech_hidpp vc4 brcmfmac hci_uart...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= b9f19259b84dc648f207a46f3581d15eeaedf4b6 < 48bfb4b03c5ff6e1fa1dc73fb915e150b0968c40, >= b9f19259b84dc648f207a46f3581d15eeaedf4b6 < d6b2fe2db1d0927b2d7df5c763eba55d0e1def3c, >= b9f19259b84dc648f207a46f3581d15eeaedf4b6 < 5343f724c912c77541029123f47ecd3d2ea63bdd, >= b9f19259b84dc648f207a46f3581d15eeaedf4b6 < 5ee0d47dcf33efd8950b347dcf4d20bab12a3fa9, >= 4.15, < 6.1.86, >= 6.2 < 6.6.27, >= 6.7 < 6.8.6
Fixed versions
6.1.86, 6.6.27, 6.8.6

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-416