Linux: Out-of-bounds Read
CVE-2022-49368 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 b4f0e57ea0d867aacffad7999527e48bd4ea9293, 5ba81f82607ead85fe36f50869fc4f5661359ab8, 657e7174603f0aab2cdedc64ac81edffd2a87afe 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 0.28% 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 b4f0e57ea0d867aacffad7999527e48bd4ea9293 or 5ba81f82607ead85fe36f50869fc4f5661359ab8 or 657e7174603f0aab2cdedc64ac81edffd2a87afe or 2bd1faedb74dc2a2be3972abcd4239b75a3e7b00, whichever matches your release line, or a later version.
- Update Linux Kernel to 4.9.318 or 4.14.283 or 4.19.247 or 5.4.198, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | 7aab747e5563ecbc9f3cb64ddea13fe7b9fee2bd up to, but not including, b4f0e57ea0d867aacffad7999527e48bd4ea9293; 7aab747e5563ecbc9f3cb64ddea13fe7b9fee2bd up to, but not including, 5ba81f82607ead85fe36f50869fc4f5661359ab8; 7aab747e5563ecbc9f3cb64ddea13fe7b9fee2bd up to, but not including, 657e7174603f0aab2cdedc64ac81edffd2a87afe; 7aab747e5563ecbc9f3cb64ddea13fe7b9fee2bd up to, but not including, 2bd1faedb74dc2a2be3972abcd4239b75a3e7b00; 7aab747e5563ecbc9f3cb64ddea13fe7b9fee2bd up to, but not including, 71ae30662ec610b92644d13f79c78f76f17873b3; 7aab747e5563ecbc9f3cb64ddea13fe7b9fee2bd up to, but not including, b24ca1cf846273361d5bd73a35de95a486a54b6d; 7aab747e5563ecbc9f3cb64ddea13fe7b9fee2bd up to, but not including, 4cde554c70d7397cfa2e4116bacb4accdfb6fd48; 7aab747e5563ecbc9f3cb64ddea13fe7b9fee2bd up to, but not including, 0b238f75b65ed4462ef4cdfa718cac0ac7fce3b8; and 2 more ranges | b4f0e57ea0d867aacffad7999527e48bd4ea9293, 5ba81f82607ead85fe36f50869fc4f5661359ab8, 657e7174603f0aab2cdedc64ac81edffd2a87afe, 2bd1faedb74dc2a2be3972abcd4239b75a3e7b00, 71ae30662ec610b92644d13f79c78f76f17873b3, b24ca1cf846273361d5bd73a35de95a486a54b6d |
| Linux | Linux Kernel | 4.9 up to, but not including, 4.9.318; 4.10 up to, but not including, 4.14.283; 4.15 up to, but not including, 4.19.247; 4.20 up to, but not including, 5.4.198; 5.5 up to, but not including, 5.10.122; 5.11 up to, but not including, 5.15.47; 5.16 up to, but not including, 5.17.15; 5.18 up to, but not including, 5.18.4 | 4.9.318, 4.14.283, 4.19.247, 5.4.198, 5.10.122, 5.15.47 |
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 | 7.1 | High | NVD |
| CVSS 3.1 | 7.1 | High | CISA (ADP) |
Official description
In the Linux kernel, the following vulnerability has been resolved: net: ethernet: mtk_eth_soc: out of bounds read in mtk_hwlro_get_fdir_entry() The "fsp->location" variable comes from user via ethtool_get_rxnfc(). Check that it is valid to prevent an out of bounds read.
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/0b238f75b65ed4462ef4cdfa718cac0ac7fce3b8
- git.kernel.org/stable/c/2bd1faedb74dc2a2be3972abcd4239b75a3e7b00
- git.kernel.org/stable/c/4cde554c70d7397cfa2e4116bacb4accdfb6fd48
- git.kernel.org/stable/c/5ba81f82607ead85fe36f50869fc4f5661359ab8
- git.kernel.org/stable/c/657e7174603f0aab2cdedc64ac81edffd2a87afe
- git.kernel.org/stable/c/71ae30662ec610b92644d13f79c78f76f17873b3
- git.kernel.org/stable/c/b24ca1cf846273361d5bd73a35de95a486a54b6d
- git.kernel.org/stable/c/b4f0e57ea0d867aacffad7999527e48bd4ea9293
- git.kernel.org/stable/c/e7e7104e2d5ddf3806a28695670f21bef471f1e1
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
- 7.1 High severity
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