Linux: Out-of-bounds Read
CVE-2024-47757 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 f3a9859767c7aea758976f5523903d247e585129, ed76d381dae125b81d09934e365391a656249da8, d20674f31626e0596ae4c1d9401dfb6739b81b58 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 f3a9859767c7aea758976f5523903d247e585129 or ed76d381dae125b81d09934e365391a656249da8 or d20674f31626e0596ae4c1d9401dfb6739b81b58 or c4f8554996e8ada3be872dfb8f60e93bcf15fb27, whichever matches your release line, or a later version.
- Update Linux Kernel to 5.10.227 or 5.15.168 or 6.1.113 or 6.6.54, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | 17c76b0104e4a6513983777e1a17e0297a12b0c4 up to, but not including, f3a9859767c7aea758976f5523903d247e585129; 17c76b0104e4a6513983777e1a17e0297a12b0c4 up to, but not including, ed76d381dae125b81d09934e365391a656249da8; 17c76b0104e4a6513983777e1a17e0297a12b0c4 up to, but not including, d20674f31626e0596ae4c1d9401dfb6739b81b58; 17c76b0104e4a6513983777e1a17e0297a12b0c4 up to, but not including, c4f8554996e8ada3be872dfb8f60e93bcf15fb27; 17c76b0104e4a6513983777e1a17e0297a12b0c4 up to, but not including, a8abfda768b9f33630cfbc4af6c4214f1e5681b0; 17c76b0104e4a6513983777e1a17e0297a12b0c4 up to, but not including, 257f9e5185eb6de83377caea686c306e22e871f2; 17c76b0104e4a6513983777e1a17e0297a12b0c4 up to, but not including, a33e967b681e088a125b979975c93e3453e686cd; 17c76b0104e4a6513983777e1a17e0297a12b0c4 up to, but not including, c4cbcc64bb31e67e02940ce060cc77f7180564cf; and 2 more ranges | f3a9859767c7aea758976f5523903d247e585129, ed76d381dae125b81d09934e365391a656249da8, d20674f31626e0596ae4c1d9401dfb6739b81b58, c4f8554996e8ada3be872dfb8f60e93bcf15fb27, a8abfda768b9f33630cfbc4af6c4214f1e5681b0, 257f9e5185eb6de83377caea686c306e22e871f2 |
| Linux | Linux Kernel | 2.6.30 up to, but not including, 5.10.227; 5.11 up to, but not including, 5.15.168; 5.16 up to, but not including, 6.1.113; 6.2 up to, but not including, 6.6.54; 6.7 up to, but not including, 6.10.13; 6.11 up to, but not including, 6.11.2 | 5.10.227, 5.15.168, 6.1.113, 6.6.54, 6.10.13, 6.11.2 |
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: nilfs2: fix potential oob read in nilfs_btree_check_delete() The function nilfs_btree_check_delete(), which checks whether degeneration to direct mapping occurs before deleting a b-tree entry, causes memory access outside the block buffer when retrieving the maximum key if the root node has no entries. This does not usually happen because b-tree mappings with 0 child nodes are never created by mkfs.nilfs2 or nilfs2 itself. However, it can happen if the b-tree root node read from a device is configured that way, so fix this potential issue by adding a check for that case.
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/257f9e5185eb6de83377caea686c306e22e871f2
- git.kernel.org/stable/c/a33e967b681e088a125b979975c93e3453e686cd
- git.kernel.org/stable/c/a8abfda768b9f33630cfbc4af6c4214f1e5681b0
- git.kernel.org/stable/c/c4cbcc64bb31e67e02940ce060cc77f7180564cf
- git.kernel.org/stable/c/c4f8554996e8ada3be872dfb8f60e93bcf15fb27
- git.kernel.org/stable/c/d20674f31626e0596ae4c1d9401dfb6739b81b58
- git.kernel.org/stable/c/f9c96351aa6718b42a9f42eaf7adce0356bdb5e8
Other references
Recent Out-of-bounds Read vulnerabilities
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
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