Linux: Out-of-bounds Read
CVE-2024-43877 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 38f72c7e7c6b55614f9407555fd5ce9d019b0fa4, 81d0664bed91a858c7b50c263954b59d65f1b414, 24062aa7407091dee3e45a8e8037df437e848718 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 0.22% 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 38f72c7e7c6b55614f9407555fd5ce9d019b0fa4 or 81d0664bed91a858c7b50c263954b59d65f1b414 or 24062aa7407091dee3e45a8e8037df437e848718 or 3d8fd92939e21ff0d45100ab208f8124af79402a, whichever matches your release line, or a later version.
- Update Linux Kernel to 6.1.103 or 6.6.44 or 6.10.3, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | 4551236b55e80b2c1720b10b77e9400118b2339e up to, but not including, 38f72c7e7c6b55614f9407555fd5ce9d019b0fa4; 66c8a83bf1de2eb3eea4734c7eda22255a965f11 up to, but not including, 81d0664bed91a858c7b50c263954b59d65f1b414; 1932dc2f4cf6ac23e48e5fcc24d21adbe35691d1 up to, but not including, 24062aa7407091dee3e45a8e8037df437e848718; 1932dc2f4cf6ac23e48e5fcc24d21adbe35691d1 up to, but not including, 3d8fd92939e21ff0d45100ab208f8124af79402a; 1932dc2f4cf6ac23e48e5fcc24d21adbe35691d1 up to, but not including, c766065e8272085ea9c436414b7ddf1f12e7787b; 1932dc2f4cf6ac23e48e5fcc24d21adbe35691d1 up to, but not including, 629913d6d79508b166c66e07e4857e20233d85a9; 1b00b7335000c0e107f774cc8ee4d5340f824f28; 5.4.301 up to, but not including, 5.5; and 1 more ranges | 38f72c7e7c6b55614f9407555fd5ce9d019b0fa4, 81d0664bed91a858c7b50c263954b59d65f1b414, 24062aa7407091dee3e45a8e8037df437e848718, 3d8fd92939e21ff0d45100ab208f8124af79402a, c766065e8272085ea9c436414b7ddf1f12e7787b, 629913d6d79508b166c66e07e4857e20233d85a9 |
| Linux | Linux Kernel | 5.16 up to, but not including, 6.1.103; 6.2 up to, but not including, 6.6.44; 6.7 up to, but not including, 6.10.3 | 6.1.103, 6.6.44, 6.10.3 |
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: media: pci: ivtv: Add check for DMA map result In case DMA fails, 'dma->SG_length' is 0. This value is later used to access 'dma->SGarray[dma->SG_length - 1]', which will cause out of bounds access. Add check to return early on invalid value. Adjust warnings accordingly. Found by Linux Verification Center (linuxtesting.org) with SVACE.
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
Other references
Recent Out-of-bounds Read vulnerabilities
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.8 High severity
- 7.8 High severity
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