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:
- GPU drivers;
- SMB network file system;
- Memory management;
- Netfilter;
- Network traffic control;
(CVE-2025-37890, CVE-2024-46787, CVE-2025-37798, CVE-2025-38000,
CVE-2025-37932, CVE-2025-38001, CVE-2025-37997, CVE-2024-50047,
CVE-2024-53051)
Fixed packages 1
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · Pro Realtime 22.04 LTS Pro:Realtime:22.04:LTS | linux-realtime | 5.15.0-1087.96 |
Vulnerabilities 9
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Critical 9.8
smb: client: fix UAF in async decryption
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix UAF in async decryption Doing an async decryption (large read) crashes with a slab-use-after-free way down in the crypto API. Reproducer: # mount.cifs -o ...,seal,esize=1 //s…
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High 7.8
userfaultfd: fix checks for huge PMDs
In the Linux kernel, the following vulnerability has been resolved: userfaultfd: fix checks for huge PMDs Patch series "userfaultfd: fix races around pmd_trans_huge() check", v2. The pmd_trans_huge() code in mfill_atomic() is wrong in three different ways dep…
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High 7.8
codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog()
In the Linux kernel, the following vulnerability has been resolved: codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog() After making all ->qlen_notify() callbacks idempotent, now it is safe to remove the check of qlen!=0 from both fq_codel_dequ…
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High 7.8
net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc
In the Linux kernel, the following vulnerability has been resolved: net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc As described in Gerrard's report [1], we have a UAF case when an hfsc class has a netem child qdisc. The crux of th…
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High 7.8
netfilter: ipset: fix region locking in hash types
In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: fix region locking in hash types Region locking introduced in v5.6-rc4 contained three macros to handle the region locks: ahash_bucket_start(), ahash_bucket_end() which gave…
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High 7.8
sch_hfsc: Fix qlen accounting bug when using peek in hfsc_enqueue()
In the Linux kernel, the following vulnerability has been resolved: sch_hfsc: Fix qlen accounting bug when using peek in hfsc_enqueue() When enqueuing the first packet to an HFSC class, hfsc_enqueue() calls the child qdisc's peek() operation before incrementi…
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High 7.8CVE-2025-38001 Public exploit
net_sched: hfsc: Address reentrant enqueue adding class to eltree twice
In the Linux kernel, the following vulnerability has been resolved: net_sched: hfsc: Address reentrant enqueue adding class to eltree twice Savino says: "We are writing to report that this recent patch (141d34391abbb315d68556b7c67ad97885407547) [1] can be byp…
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Medium 5.5
drm/i915/hdcp: Add encoder check in intel_hdcp_get_capability
In the Linux kernel, the following vulnerability has been resolved: drm/i915/hdcp: Add encoder check in intel_hdcp_get_capability Sometimes during hotplug scenario or suspend/resume scenario encoder is not always initialized when intel_hdcp_get_capability add…
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Unscored —
sch_htb: make htb_qlen_notify() idempotent
In the Linux kernel, the following vulnerability has been resolved: sch_htb: make htb_qlen_notify() idempotent htb_qlen_notify() always deactivates the HTB class and in fact could trigger a warning if it is already deactivated. Therefore, it is not idempotent…
References
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report
https://ubuntu.com/security/CVE-2024-46787
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report
https://ubuntu.com/security/CVE-2024-50047
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report
https://ubuntu.com/security/CVE-2024-53051
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report
https://ubuntu.com/security/CVE-2025-37798
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report
https://ubuntu.com/security/CVE-2025-37890
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report
https://ubuntu.com/security/CVE-2025-37932
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report
https://ubuntu.com/security/CVE-2025-37997
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report
https://ubuntu.com/security/CVE-2025-38000
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report
https://ubuntu.com/security/CVE-2025-38001