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:
- Cryptographic API;
- GPU drivers;
- BTRFS file system;
- GFS2 file system;
- UDF file system;
- NFC subsystem;
- Network traffic control;
(CVE-2021-47142, CVE-2021-47145, CVE-2021-47254, CVE-2024-46777,
CVE-2025-21735, CVE-2026-23060, CVE-2026-23074)
Fixed packages 5
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · Pro 14.04 LTS Pro:14.04:LTS | linux-aws | 4.4.0-1153.159 |
| Ubuntu · Pro 14.04 LTS Pro:14.04:LTS | linux-lts-xenial | 4.4.0-279.313~14.04.1 |
| Ubuntu · Pro 16.04 LTS Pro:16.04:LTS | linux | 4.4.0-279.313 |
| Ubuntu · Pro 16.04 LTS Pro:16.04:LTS | linux-aws | 4.4.0-1191.206 |
| Ubuntu · Pro 16.04 LTS Pro:16.04:LTS | linux-kvm | 4.4.0-1154.165 |
Vulnerabilities 7
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High 8.8
NFC: nci: Add bounds checking in nci_hci_create_pipe()
In the Linux kernel, the following vulnerability has been resolved: NFC: nci: Add bounds checking in nci_hci_create_pipe() The "pipe" variable is a u8 which comes from the network. If it's more than 127, then it results in memory corruption in the caller, nci…
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High 7.8
drm/amdgpu: Fix a use-after-free
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Fix a use-after-free looks like we forget to set ttm->sg to NULL. Hit panic below [ 1235.844104] general protection fault, probably for non-canonical address 0x6b6b6b6b6b6b7b4b: 0…
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High 7.8
gfs2: Fix use-after-free in gfs2_glock_shrink_scan
In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix use-after-free in gfs2_glock_shrink_scan The GLF_LRU flag is checked under lru_lock in gfs2_glock_remove_from_lru() to remove the glock from the lru list in __gfs2_glock_put(). On t…
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High 7.8
udf: Avoid excessive partition lengths
In the Linux kernel, the following vulnerability has been resolved: udf: Avoid excessive partition lengths Avoid mounting filesystems where the partition would overflow the 32-bits used for block number. Also refuse to mount filesystems where the partition le…
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High 7.8
net/sched: Enforce that teql can only be used as root qdisc
In the Linux kernel, the following vulnerability has been resolved: net/sched: Enforce that teql can only be used as root qdisc Design intent of teql is that it is only supposed to be used as root qdisc. We need to check for that constraint. Although not impo…
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Unscored —
btrfs: do not BUG_ON in link_to_fixup_dir
In the Linux kernel, the following vulnerability has been resolved: btrfs: do not BUG_ON in link_to_fixup_dir While doing error injection testing I got the following panic kernel BUG at fs/btrfs/tree-log.c:1862! invalid opcode: 0000 [#1] SMP NOPTI CPU: 1 PID:…
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Unscored —
crypto: authencesn - reject too-short AAD (assoclen<8) to match ESP/ESN spec
In the Linux kernel, the following vulnerability has been resolved: crypto: authencesn - reject too-short AAD (assoclen<8) to match ESP/ESN spec authencesn assumes an ESP/ESN-formatted AAD. When assoclen is shorter than the minimum expected length, crypto_aut…
References
-
report
https://ubuntu.com/security/CVE-2021-47142
-
report
https://ubuntu.com/security/CVE-2021-47145
-
report
https://ubuntu.com/security/CVE-2021-47254
-
report
https://ubuntu.com/security/CVE-2024-46777
-
report
https://ubuntu.com/security/CVE-2025-21735
-
report
https://ubuntu.com/security/CVE-2026-23060
-
report
https://ubuntu.com/security/CVE-2026-23074