Summary
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- Ext4 file system;
- Network file system (NFS) server daemon;
- Packet sockets;
- Network traffic control;
- VMware vSockets driver;
(CVE-2025-37785, CVE-2025-38618, CVE-2025-38617, CVE-2024-57996,
CVE-2025-37752, CVE-2025-38477, CVE-2025-21796, CVE-2025-38350)
Fixed packages 1
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · Pro 20.04 LTS Pro:20.04:LTS | linux-oracle | 5.4.0-1149.159 |
Vulnerabilities 8
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Critical 9.8
nfsd: clear acl_access/acl_default after releasing them
In the Linux kernel, the following vulnerability has been resolved: nfsd: clear acl_access/acl_default after releasing them If getting acl_default fails, acl_access and acl_default will be released simultaneously. However, acl_access will still retain a point…
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High 7.8
net_sched: sch_sfq: don't allow 1 packet limit
In the Linux kernel, the following vulnerability has been resolved: net_sched: sch_sfq: don't allow 1 packet limit The current implementation does not work correctly with a limit of 1. iproute2 actually checks for this and this patch adds the check in kernel …
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High 7.8
net_sched: sch_sfq: move the limit validation
In the Linux kernel, the following vulnerability has been resolved: net_sched: sch_sfq: move the limit validation It is not sufficient to directly validate the limit on the data that the user passes as it can be updated based on how the other parameters are c…
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High 7.8
ext4: fix OOB read when checking dotdot dir
In the Linux kernel, the following vulnerability has been resolved: ext4: fix OOB read when checking dotdot dir Mounting a corrupted filesystem with directory which contains '.' dir entry with rec_len == block size results in out-of-bounds read (later on, whe…
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High 7.8
net/sched: Always pass notifications when child class becomes empty
In the Linux kernel, the following vulnerability has been resolved: net/sched: Always pass notifications when child class becomes empty Certain classful qdiscs may invoke their classes' dequeue handler on an enqueue operation. This may unexpectedly empty the …
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High 7.8
net/sched: sch_qfq: Fix race condition on qfq_aggregate
In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_qfq: Fix race condition on qfq_aggregate A race condition can occur when 'agg' is modified in qfq_change_agg (called during qfq_enqueue) while other threads access it concurren…
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High 7.8
net/packet: fix a race in packet_set_ring() and packet_notifier()
In the Linux kernel, the following vulnerability has been resolved: net/packet: fix a race in packet_set_ring() and packet_notifier() When packet_set_ring() releases po->bind_lock, another thread can run packet_notifier() and process an NETDEV_UP event. This …
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High 7.8
vsock: Do not allow binding to VMADDR_PORT_ANY
In the Linux kernel, the following vulnerability has been resolved: vsock: Do not allow binding to VMADDR_PORT_ANY It is possible for a vsock to autobind to VMADDR_PORT_ANY. This can cause a use-after-free when a connection is made to the bound socket. The so…
References
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report
https://ubuntu.com/security/CVE-2024-57996
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report
https://ubuntu.com/security/CVE-2025-21796
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report
https://ubuntu.com/security/CVE-2025-37752
-
report
https://ubuntu.com/security/CVE-2025-37785
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report
https://ubuntu.com/security/CVE-2025-38350
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report
https://ubuntu.com/security/CVE-2025-38477
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report
https://ubuntu.com/security/CVE-2025-38617
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report
https://ubuntu.com/security/CVE-2025-38618