Linux: Out-of-bounds Read
CVE-2022-48805 is a high-severity out-of-bounds read vulnerability in Linux, with a CVSS 3.1 base score of 7.8 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 711b6bf3fb052f0a6b5b3205d50e30c0c2980382, 63f0cfb36c1f1964a59ce544156677601e2d8740, 1668781ed24da43498799aa4f65714a7de201930 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 0.32% 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 711b6bf3fb052f0a6b5b3205d50e30c0c2980382 or 63f0cfb36c1f1964a59ce544156677601e2d8740 or 1668781ed24da43498799aa4f65714a7de201930 or a0fd5492ee769029a636f1fb521716b022b1423d, whichever matches your release line, or a later version.
- Update Linux Kernel to 4.9.303 or 4.14.268 or 4.19.231 or 5.4.180, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | e2ca90c276e1fc410d7cd3c1a4eee245ec902a20 up to, but not including, 711b6bf3fb052f0a6b5b3205d50e30c0c2980382; e2ca90c276e1fc410d7cd3c1a4eee245ec902a20 up to, but not including, 63f0cfb36c1f1964a59ce544156677601e2d8740; e2ca90c276e1fc410d7cd3c1a4eee245ec902a20 up to, but not including, 1668781ed24da43498799aa4f65714a7de201930; e2ca90c276e1fc410d7cd3c1a4eee245ec902a20 up to, but not including, a0fd5492ee769029a636f1fb521716b022b1423d; e2ca90c276e1fc410d7cd3c1a4eee245ec902a20 up to, but not including, 758290defe93a865a2880d10c5d5abd288b64b5d; e2ca90c276e1fc410d7cd3c1a4eee245ec902a20 up to, but not including, ffd0393adcdcefab7e131488e10dcfde5e02d6eb; e2ca90c276e1fc410d7cd3c1a4eee245ec902a20 up to, but not including, 9681823f96a811268265f35307072ad80713c274; e2ca90c276e1fc410d7cd3c1a4eee245ec902a20 up to, but not including, 57bc3d3ae8c14df3ceb4e17d26ddf9eeab304581; and 1 more ranges | 711b6bf3fb052f0a6b5b3205d50e30c0c2980382, 63f0cfb36c1f1964a59ce544156677601e2d8740, 1668781ed24da43498799aa4f65714a7de201930, a0fd5492ee769029a636f1fb521716b022b1423d, 758290defe93a865a2880d10c5d5abd288b64b5d, ffd0393adcdcefab7e131488e10dcfde5e02d6eb |
| Linux | Linux Kernel | 3.9 up to, but not including, 4.9.303; 4.10 up to, but not including, 4.14.268; 4.15 up to, but not including, 4.19.231; 4.20 up to, but not including, 5.4.180; 5.5 up to, but not including, 5.10.101; 5.11 up to, but not including, 5.15.24; 5.16 up to, but not including, 5.16.10; 5.17 | 4.9.303, 4.14.268, 4.19.231, 5.4.180, 5.10.101, 5.15.24 |
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
- HighData or code can be modified at will.
- 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:H/A:H. Scored by NVD.
Official description
In the Linux kernel, the following vulnerability has been resolved: net: usb: ax88179_178a: Fix out-of-bounds accesses in RX fixup ax88179_rx_fixup() contains several out-of-bounds accesses that can be triggered by a malicious (or defective) USB device, in particular: - The metadata array (hdr_off..hdr_off+2*pkt_cnt) can be out of bounds, causing OOB reads and (on big-endian systems) OOB endianness flips. - A packet can overlap the metadata array, causing a later OOB endianness flip to corrupt data used by a cloned SKB that has already been handed off into the network stack. - A packet SKB can be constructed whose tail is far beyond its end, causing out-of-bounds heap data to be considered part of the SKB's data. I have tested that this can be used by a malicious USB device to send a bogus ICMPv6 Echo Request and receive an ICMPv6 Echo Reply in response that contains random kernel heap data. It's probably also possible to get OOB writes from this on a little-endian system somehow - maybe by triggering skb_cow() via IP options processing -, but I haven't tested that.
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/1668781ed24da43498799aa4f65714a7de201930
- git.kernel.org/stable/c/57bc3d3ae8c14df3ceb4e17d26ddf9eeab304581
- git.kernel.org/stable/c/63f0cfb36c1f1964a59ce544156677601e2d8740
- git.kernel.org/stable/c/711b6bf3fb052f0a6b5b3205d50e30c0c2980382
- git.kernel.org/stable/c/758290defe93a865a2880d10c5d5abd288b64b5d
- git.kernel.org/stable/c/9681823f96a811268265f35307072ad80713c274
- git.kernel.org/stable/c/a0fd5492ee769029a636f1fb521716b022b1423d
- git.kernel.org/stable/c/ffd0393adcdcefab7e131488e10dcfde5e02d6eb
Recent Out-of-bounds Read vulnerabilities
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 9.1 Critical severity
- 8.8 High severity
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