Linux: Out-of-bounds Read
CVE-2024-41091 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 32b0aaba5dbc85816898167d9b5d45a22eae82e9, 6100e0237204890269e3f934acfc50d35fd6f319, 589382f50b4a5d90d16d8bc9dcbc0e927a3e39b2 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 0.26% 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 32b0aaba5dbc85816898167d9b5d45a22eae82e9 or 6100e0237204890269e3f934acfc50d35fd6f319 or 589382f50b4a5d90d16d8bc9dcbc0e927a3e39b2 or ad6b3f622ccfb4bfedfa53b6ebd91c3d1d04f146, whichever matches your release line, or a later version.
- Update Linux Kernel to 5.4.281 or 5.10.223 or 5.15.164 or 6.1.102, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | 043d222f93ab8c76b56a3b315cd8692e35affb6c up to, but not including, 32b0aaba5dbc85816898167d9b5d45a22eae82e9; 043d222f93ab8c76b56a3b315cd8692e35affb6c up to, but not including, 6100e0237204890269e3f934acfc50d35fd6f319; 043d222f93ab8c76b56a3b315cd8692e35affb6c up to, but not including, 589382f50b4a5d90d16d8bc9dcbc0e927a3e39b2; 043d222f93ab8c76b56a3b315cd8692e35affb6c up to, but not including, ad6b3f622ccfb4bfedfa53b6ebd91c3d1d04f146; 043d222f93ab8c76b56a3b315cd8692e35affb6c up to, but not including, d5ad89b7d01ed4e66fd04734fc63d6e78536692a; 043d222f93ab8c76b56a3b315cd8692e35affb6c up to, but not including, a9d1c27e2ee3b0ea5d40c105d6e728fc114470bb; 043d222f93ab8c76b56a3b315cd8692e35affb6c up to, but not including, 8418f55302fa1d2eeb73e16e345167e545c598a5; 043d222f93ab8c76b56a3b315cd8692e35affb6c up to, but not including, 049584807f1d797fc3078b68035450a9769eb5c3; and 1 more ranges | 32b0aaba5dbc85816898167d9b5d45a22eae82e9, 6100e0237204890269e3f934acfc50d35fd6f319, 589382f50b4a5d90d16d8bc9dcbc0e927a3e39b2, ad6b3f622ccfb4bfedfa53b6ebd91c3d1d04f146, d5ad89b7d01ed4e66fd04734fc63d6e78536692a, a9d1c27e2ee3b0ea5d40c105d6e728fc114470bb |
| Linux | Linux Kernel | 4.20 up to, but not including, 5.4.281; 5.5 up to, but not including, 5.10.223; 5.11 up to, but not including, 5.15.164; 5.16 up to, but not including, 6.1.102; 6.2 up to, but not including, 6.6.43; 6.7 up to, but not including, 6.9.12; 6.10 up to, but not including, 6.10.2 | 5.4.281, 5.10.223, 5.15.164, 6.1.102, 6.6.43, 6.9.12 |
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 | 8.8 | High | CNA |
| CVSS 3.1 | 7.1 | High | NVD |
Official description
In the Linux kernel, the following vulnerability has been resolved: tun: add missing verification for short frame The cited commit missed to check against the validity of the frame length in the tun_xdp_one() path, which could cause a corrupted skb to be sent downstack. Even before the skb is transmitted, the tun_xdp_one-->eth_type_trans() may access the Ethernet header although it can be less than ETH_HLEN. Once transmitted, this could either cause out-of-bound access beyond the actual length, or confuse the underlayer with incorrect or inconsistent header length in the skb metadata. In the alternative path, tun_get_user() already prohibits short frame which has the length less than Ethernet header size from being transmitted for IFF_TAP. This is to drop any frame shorter than the Ethernet header size just like how tun_get_user() does. CVE: CVE-2024-41091
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
- git.kernel.org/stable/c/049584807f1d797fc3078b68035450a9769eb5c3
- git.kernel.org/stable/c/32b0aaba5dbc85816898167d9b5d45a22eae82e9
- git.kernel.org/stable/c/589382f50b4a5d90d16d8bc9dcbc0e927a3e39b2
- git.kernel.org/stable/c/6100e0237204890269e3f934acfc50d35fd6f319
- git.kernel.org/stable/c/8418f55302fa1d2eeb73e16e345167e545c598a5
- git.kernel.org/stable/c/a9d1c27e2ee3b0ea5d40c105d6e728fc114470bb
- git.kernel.org/stable/c/ad6b3f622ccfb4bfedfa53b6ebd91c3d1d04f146
- git.kernel.org/stable/c/d5ad89b7d01ed4e66fd04734fc63d6e78536692a
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
- 7.1 High severity
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