Linux: Out-of-bounds Read
CVE-2022-48701 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 b970518014f2f0f6c493fb86c1e092b936899061, 91904870370fd986c29719846ed76d559de43251, 2a308e415d247a23d4d64c964c02e782eede2936 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 b970518014f2f0f6c493fb86c1e092b936899061 or 91904870370fd986c29719846ed76d559de43251 or 2a308e415d247a23d4d64c964c02e782eede2936 or 0492798bf8dfcc09c9337a1ba065da1d1ca68712, whichever matches your release line, or a later version.
- Update Linux Kernel to 4.9.328 or 4.14.293 or 4.19.258 or 5.4.213, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | b9d43bcd061956c8144bcb453d07d13236b6ab28 up to, but not including, b970518014f2f0f6c493fb86c1e092b936899061; b9d43bcd061956c8144bcb453d07d13236b6ab28 up to, but not including, 91904870370fd986c29719846ed76d559de43251; b9d43bcd061956c8144bcb453d07d13236b6ab28 up to, but not including, 2a308e415d247a23d4d64c964c02e782eede2936; b9d43bcd061956c8144bcb453d07d13236b6ab28 up to, but not including, 0492798bf8dfcc09c9337a1ba065da1d1ca68712; b9d43bcd061956c8144bcb453d07d13236b6ab28 up to, but not including, 6123bec8480d23369e2ee0b2208611619f269faf; b9d43bcd061956c8144bcb453d07d13236b6ab28 up to, but not including, 98e8e67395cc6d0cdf3a771f86ea42d0ee6e59dd; b9d43bcd061956c8144bcb453d07d13236b6ab28 up to, but not including, 8293e61bbf908b18ff9935238d4fc2ad359e3fe0; b9d43bcd061956c8144bcb453d07d13236b6ab28 up to, but not including, e53f47f6c1a56d2af728909f1cb894da6b43d9bf; and 1 more ranges | b970518014f2f0f6c493fb86c1e092b936899061, 91904870370fd986c29719846ed76d559de43251, 2a308e415d247a23d4d64c964c02e782eede2936, 0492798bf8dfcc09c9337a1ba065da1d1ca68712, 6123bec8480d23369e2ee0b2208611619f269faf, 98e8e67395cc6d0cdf3a771f86ea42d0ee6e59dd |
| Linux | Linux Kernel | before 4.9.328; 4.10 up to, but not including, 4.14.293; 4.15 up to, but not including, 4.19.258; 4.20 up to, but not including, 5.4.213; 5.5 up to, but not including, 5.10.143; 5.11 up to, but not including, 5.15.68; 5.16 up to, but not including, 5.19.9; 6.0 | 4.9.328, 4.14.293, 4.19.258, 5.4.213, 5.10.143, 5.15.68 |
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.
Official description
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Fix an out-of-bounds bug in __snd_usb_parse_audio_interface() There may be a bad USB audio device with a USB ID of (0x04fa, 0x4201) and the number of it's interfaces less than 4, an out-of-bounds read bug occurs when parsing the interface descriptor for this device. Fix this by checking the number of interfaces.
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/0492798bf8dfcc09c9337a1ba065da1d1ca68712
- git.kernel.org/stable/c/2a308e415d247a23d4d64c964c02e782eede2936
- git.kernel.org/stable/c/6123bec8480d23369e2ee0b2208611619f269faf
- git.kernel.org/stable/c/8293e61bbf908b18ff9935238d4fc2ad359e3fe0
- git.kernel.org/stable/c/91904870370fd986c29719846ed76d559de43251
- git.kernel.org/stable/c/98e8e67395cc6d0cdf3a771f86ea42d0ee6e59dd
- git.kernel.org/stable/c/b970518014f2f0f6c493fb86c1e092b936899061
- git.kernel.org/stable/c/e53f47f6c1a56d2af728909f1cb894da6b43d9bf
Recent Out-of-bounds Read vulnerabilities
- 7.8 High severity
- 7.8 High severity
- 7.8 High severity
- 7.8 High severity
- 7.8 High severity
- 7.1 High severity
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