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CVE-2024-36016tty: n_gsm: fix possible out-of-bounds in gsm0_receive()

Description

In the Linux kernel, the following vulnerability has been resolved: tty: n_gsm: fix possible out-of-bounds in gsm0_receive() Assuming the following: - side A configures the n_gsm in basic option mode - side B sends the header of a basic option mode frame with data length 1 - side A switches to advanced option mode - side B sends 2 data bytes which exceeds gsm->len Reason: gsm->len is not used in advanced option mode. - side A switches to basic option mode - side B keeps sending until gsm0_receive() writes past gsm->buf Reason: Neither gsm->state nor gsm->len have been reset after reconfiguration. Fix this by changing gsm->count to gsm->len comparison from equal to less than. Also add upper limit checks against the constant MAX_MRU in gsm0_receive() and gsm1_receive() to harden against memory corruption of gsm->len and gsm->mru. All other checks remain as we still need to limit the data according to the user configuration and actual payload size.

Timeline

  1. ID reserved

    By Linux

  2. · 12 days later

    Published

  3. · 2 years later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2024-36016, by who scored it
Scored byCVSSScoreVector
LinuxCNA (assigner)3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA-ADPADP (enrichment)3.1High7.7CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
NVDNVD · Modified3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.27% · top 81% of all CVEs (15 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.

Affected products

  • Linux · Linux

    • affected e1eaea46bb4020b38a141b84f88565d4603f8dd0 – < 9513d4148950b05bc99fa7314dc883cc0e1605e5
    • affected e1eaea46bb4020b38a141b84f88565d4603f8dd0 – < b229bc6c6ea9fe459fc3fa94fd0a27a2f32aca56
    • affected e1eaea46bb4020b38a141b84f88565d4603f8dd0 – < 0fb736c9931e02dbc7d9a75044c8e1c039e50f04
    • affected e1eaea46bb4020b38a141b84f88565d4603f8dd0 – < 4c267110fc110390704cc065edb9817fdd10ff54
    • affected e1eaea46bb4020b38a141b84f88565d4603f8dd0 – < 46f52c89a7e7d2691b97a9728e4591d071ca8abc
    • affected e1eaea46bb4020b38a141b84f88565d4603f8dd0 – < 774d83b008eccb1c48c14dc5486e7aa255731350
    • affected e1eaea46bb4020b38a141b84f88565d4603f8dd0 – < f126ce7305fe88f49cdabc6db4168b9318898ea3
    • affected e1eaea46bb4020b38a141b84f88565d4603f8dd0 – < b890d45aaf02b564e6cae2d2a590f9649330857d
    • affected e1eaea46bb4020b38a141b84f88565d4603f8dd0 – < 47388e807f85948eefc403a8a5fdc5b406a65d5a

  • Linux · Linux

    • affected 2.6.35
    • unaffected < 2.6.35
    • unaffected 4.19.316 – ≤ 4.19.*
    • unaffected 5.4.278 – ≤ 5.4.*
    • unaffected 5.10.219 – ≤ 5.10.*
    • unaffected 5.15.161 – ≤ 5.15.*
    • unaffected 6.1.93 – ≤ 6.1.*
    • unaffected 6.6.33 – ≤ 6.6.*
    • unaffected 6.8.12 – ≤ 6.8.*
    • unaffected 6.9.3 – ≤ 6.9.*
    • unaffected 6.10 – ≤ *

References

References10

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .