Linux: Out-of-bounds Read
CVE-2024-36019 is a high-severity out-of-bounds read vulnerability in Linux, with a CVSS 3.1 base score of 7.1 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. The record lists versions 3af6c5ac72dc5b721058132a0a1d7779e443175e, 51c4440b9d3fd7c8234e6de9170a487c03506e53, 00bb549d7d63a21532e76e4a334d7807a54d9f31 as the first without the flaw, so updating Linux to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.24% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Linux to 3af6c5ac72dc5b721058132a0a1d7779e443175e or 51c4440b9d3fd7c8234e6de9170a487c03506e53 or 00bb549d7d63a21532e76e4a334d7807a54d9f31, whichever matches your release line, or a later version.
- Update Linux Kernel to 6.6.26 or 6.8.5, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | f033c26de5a5734625d2dd1dc196745fae186f1b up to, but not including, 3af6c5ac72dc5b721058132a0a1d7779e443175e; f033c26de5a5734625d2dd1dc196745fae186f1b up to, but not including, 51c4440b9d3fd7c8234e6de9170a487c03506e53; f033c26de5a5734625d2dd1dc196745fae186f1b up to, but not including, 00bb549d7d63a21532e76e4a334d7807a54d9f31; 6.4 | 3af6c5ac72dc5b721058132a0a1d7779e443175e, 51c4440b9d3fd7c8234e6de9170a487c03506e53, 00bb549d7d63a21532e76e4a334d7807a54d9f31 |
| Linux | Linux Kernel | 6.4 up to, but not including, 6.6.26; 6.7 up to, but not including, 6.8.5; 6.9 | 6.6.26, 6.8.5 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.8 | High | CNA |
| CVSS 3.1 | 7.1 | High | NVD |
Official description
In the Linux kernel, the following vulnerability has been resolved: regmap: maple: Fix cache corruption in regcache_maple_drop() When keeping the upper end of a cache block entry, the entry[] array must be indexed by the offset from the base register of the block, i.e. max - mas.index. The code was indexing entry[] by only the register address, leading to an out-of-bounds access that copied some part of the kernel memory over the cache contents. This bug was not detected by the regmap KUnit test because it only tests with a block of registers starting at 0, so mas.index == 0.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Out-of-bounds Read
The product reads data past the end, or before the beginning, of the intended buffer.
How developers prevent this class of flaw
- Use a language that provides appropriate memory abstractions.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
Recent Out-of-bounds Read vulnerabilities
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 8.6 High severity
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