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

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于存在越界写入，会导致内存损坏。

CVSS 7.8 · High EPSS 0.27% · P17

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux e1eaea46bb4020b38a141b84f88565d4603f8dd0< 9513d4148950b05bc99fa7314dc883cc0e1605e5 affected
e1eaea46bb4020b38a141b84f88565d4603f8dd0< b229bc6c6ea9fe459fc3fa94fd0a27a2f32aca56 affected
e1eaea46bb4020b38a141b84f88565d4603f8dd0< 0fb736c9931e02dbc7d9a75044c8e1c039e50f04 affected
e1eaea46bb4020b38a141b84f88565d4603f8dd0< 4c267110fc110390704cc065edb9817fdd10ff54 affected
e1eaea46bb4020b38a141b84f88565d4603f8dd0< 46f52c89a7e7d2691b97a9728e4591d071ca8abc affected
e1eaea46bb4020b38a141b84f88565d4603f8dd0< 774d83b008eccb1c48c14dc5486e7aa255731350 affected
e1eaea46bb4020b38a141b84f88565d4603f8dd0< f126ce7305fe88f49cdabc6db4168b9318898ea3 affected
e1eaea46bb4020b38a141b84f88565d4603f8dd0< b890d45aaf02b564e6cae2d2a590f9649330857d affected
… +12 more rows
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I. Basic Information for CVE-2024-36016

Vulnerability Information
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Vulnerability Title
tty: n_gsm: fix possible out-of-bounds in gsm0_receive()
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于存在越界写入，会导致内存损坏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux e1eaea46bb4020b38a141b84f88565d4603f8dd0 ~ 9513d4148950b05bc99fa7314dc883cc0e1605e5 -
Linux Linux 2.6.35 -

II. Public POCs for CVE-2024-36016

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III. Intelligence Information for CVE-2024-36016

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Mailing List Discussions for CVE-2024-36016 (1)

Other References for CVE-2024-36016 (9)

Same Patch Batch · Linux · 2024-05-29 · 4 CVEs total

CVE-2023-52881 9.8 CRITICAL tcp: do not accept ACK of bytes we never sent
CVE-2024-36015 ppdev: Add an error check in register_device
CVE-2024-36014 drm/arm/malidp: fix a possible null pointer dereference

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-36016

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