Linux: Out-of-bounds Read
CVE-2022-49444 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 09cb6663618a74fe5572a4931ecbf098832e79ec, 921630e2e5124a04158129a8f22f4b425e61a858, 45a76414b6d8b8b39c23fea53b9d20e831ae72a0 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 0.29% 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 09cb6663618a74fe5572a4931ecbf098832e79ec or 921630e2e5124a04158129a8f22f4b425e61a858 or 45a76414b6d8b8b39c23fea53b9d20e831ae72a0 or 391e982bfa632b8315235d8be9c0a81374c6a19c, whichever matches your release line, or a later version.
- Update Linux Kernel to 5.5 or 5.11 or 5.15.54 or 5.17.14, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | ec2a29593c83ed71a7f16e3243941ebfcf75fdf6 up to, but not including, 09cb6663618a74fe5572a4931ecbf098832e79ec; ec2a29593c83ed71a7f16e3243941ebfcf75fdf6 up to, but not including, 921630e2e5124a04158129a8f22f4b425e61a858; ec2a29593c83ed71a7f16e3243941ebfcf75fdf6 up to, but not including, 45a76414b6d8b8b39c23fea53b9d20e831ae72a0; ec2a29593c83ed71a7f16e3243941ebfcf75fdf6 up to, but not including, 391e982bfa632b8315235d8be9c0a81374c6a19c; 05d891e76dde3e430c707dae7d85139794eeadbd; d802672c7f00963613f289579073ac519f0d306c; 214aa69cac91a723239118bbbfe77d5654ddff6b; 5.4.110 up to, but not including, 5.5; and 3 more ranges | 09cb6663618a74fe5572a4931ecbf098832e79ec, 921630e2e5124a04158129a8f22f4b425e61a858, 45a76414b6d8b8b39c23fea53b9d20e831ae72a0, 391e982bfa632b8315235d8be9c0a81374c6a19c, 5.5, 5.11 |
| Linux | Linux Kernel | 5.4.110 up to, but not including, 5.5; 5.10.26 up to, but not including, 5.11; 5.11.3 up to, but not including, 5.15.54; 5.16 up to, but not including, 5.17.14; 5.18 up to, but not including, 5.18.3 | 5.5, 5.11, 5.15.54, 5.17.14, 5.18.3 |
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.
Official description
In the Linux kernel, the following vulnerability has been resolved: module: fix [e_shstrndx].sh_size=0 OOB access It is trivial to craft a module to trigger OOB access in this line: if (info->secstrings[strhdr->sh_size - 1] != '\0') { BUG: unable to handle page fault for address: ffffc90000aa0fff PGD 100000067 P4D 100000067 PUD 100066067 PMD 10436f067 PTE 0 Oops: 0000 [#1] PREEMPT SMP PTI CPU: 7 PID: 1215 Comm: insmod Not tainted 5.18.0-rc5-00007-g9bf578647087-dirty #10 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-4.fc34 04/01/2014 RIP: 0010:load_module+0x19b/0x2391 [rebased patch onto modules-next]
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
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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