CVE-2024-36935: ice: ensure the copied buf is NUL terminated
In the Linux kernel, the following vulnerability has been resolved:
ice: ensure the copied buf is NUL terminated
Currently, we allocate a count-sized kernel buffer and copy count bytes
from userspace to that buffer. Later, we use sscanf on this buffer but we
don't ensure that the string is terminated inside the buffer, this can lead
to OOB read when using sscanf. Fix this issue by using memdup_user_nul
instead of memdup_user.
Security readout for executives and security teams
Plain-English summary
CVE-2024-36935 is a Linux kernel bug in the ice driver. User-provided text can be copied without a guaranteed string terminator, then parsed later, which may cause the kernel to read beyond the copied buffer. The source bundle does not provide a CVSS score, impact rating, or evidence of active exploitation.
Executive priority
Treat this as a kernel maintenance item until severity is clarified. Prioritize affected production systems using the ice driver, but do not escalate as actively exploited based on the provided evidence.
Technical view
The ice driver allocated a count-sized kernel buffer with memdup_user, copied count bytes from userspace, then passed the buffer to sscanf without ensuring NUL termination. The fix changes the copy path to memdup_user_nul, preventing an out-of-bounds read during string parsing.
Likely exposure
Exposure is most relevant to Linux systems running affected kernel versions listed in the CVE data, including 6.8, 6.8.10, and 6.9, where the ice driver code is present and reachable. The source bundle does not identify distributions, appliances, or cloud images.
Exploitation context
The CVE source says this can lead to an out-of-bounds read when sscanf processes an unterminated buffer. CISA KEV status is false in the bundle, and no cited source states active exploitation or public weaponization.
Researcher notes
The available record is narrow: root cause and fix are clear, but CVSS, CWE, attacker prerequisites, and concrete impact are not supplied. Analysis should stay tied to the buffer termination issue and the two upstream stable commit references.
Mitigation direction
Check vendor or distribution guidance for fixed kernels addressing CVE-2024-36935.
Upgrade to a kernel build containing the referenced stable fixes when available.
Prioritize systems running affected 6.8 or 6.9 kernels with the ice driver in use.
Track kernel package changelogs for the fix title or referenced commit IDs.
Validation and detection
Inventory Linux kernel versions across servers and images.
Identify systems where the ice driver is present or loaded.
Confirm whether kernel source or package metadata includes the referenced stable fix commits.
Record distribution advisory status if vendor packages do not expose commit-level details.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Potential ATT&CK relevance
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CVE-2024-36935 mapping review
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