CVE-2024-36016: tty: n_gsm: fix possible out-of-bounds in gsm0_receive()
Vulnerability summary
CVE-2024-36016 is a high (CVSS 7.8) Out-of-bounds Read vulnerability in linux. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 18.5% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 39 · Related 29Timeline
- 29-05-2024PublishedVulnerability first disclosed.
- 05-08-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVDNIST7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.27%
Chance of exploitation in the next 30 days
Percentile
19%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.27% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu128 products
- linuxAll versions (No fix recorded) | < 4.4.0-257.291 | < 4.15.0-227.239 | < 5.4.0-190.210 | < 5.15.0-117.127 | < 6.8.0-39.39
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 4.4.0-1134.140 | < 4.4.0-1172.187 | < 4.15.0-1170.183 | < 5.4.0-1129.139 | < 5.15.0-1066.72 | < 6.8.0-1012.13
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ e1eaea46bb4020b38a141b84f88565d4603f8dd0, < 9513d4148950b05bc99fa7314dc883cc0e1605e5 | ≥ e1eaea46bb4020b38a141b84f88565d4603f8dd0, < b229bc6c6ea9fe459fc3fa94fd0a27a2f32aca56 | ≥ e1eaea46bb4020b38a141b84f88565d4603f8dd0, < 0fb736c9931e02dbc7d9a75044c8e1c039e50f04 | ≥ e1eaea46bb4020b38a141b84f88565d4603f8dd0, < 4c267110fc110390704cc065edb9817fdd10ff54 | ≥ e1eaea46bb4020b38a141b84f88565d4603f8dd0, < 46f52c89a7e7d2691b97a9728e4591d071ca8abc | ≥ e1eaea46bb4020b38a141b84f88565d4603f8dd0, < 774d83b008eccb1c48c14dc5486e7aa255731350 | ≥ e1eaea46bb4020b38a141b84f88565d4603f8dd0, < f126ce7305fe88f49cdabc6db4168b9318898ea3 | ≥ e1eaea46bb4020b38a141b84f88565d4603f8dd0, < b890d45aaf02b564e6cae2d2a590f9649330857d | ≥ e1eaea46bb4020b38a141b84f88565d4603f8dd0, < 47388e807f85948eefc403a8a5fdc5b406a65d5a | 2.6.35
- linux_kernel≥ 2.6.35, < 4.19.316 | ≥ 4.20, < 5.4.278 | ≥ 5.5, < 5.10.219 | ≥ 5.11, < 5.15.161 | ≥ 5.16, < 6.1.93 | ≥ 6.2, < 6.6.33 | ≥ 6.7, < 6.8.12 | ≥ 6.9, < 6.9.3
Debian1 product
- linux< 6.1.94-1 | < 6.8.12-1
3 vendors · 131 products
