CVE-2026-22987
published 2026-01-23CVE-2026-22987: In the Linux kernel, the following vulnerability has been resolved: net/sched: act_api: avoid dereferencing ERR_PTR in tcf_idrinfo_destroy syzbot reported a…
PriorityP418medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.10%
1.1th percentile
In the Linux kernel, the following vulnerability has been resolved:
net/sched: act_api: avoid dereferencing ERR_PTR in tcf_idrinfo_destroy
syzbot reported a crash in tc_act_in_hw() during netns teardown where
tcf_idrinfo_destroy() passed an ERR_PTR(-EBUSY) value as a tc_action
pointer, leading to an invalid dereference.
Guard against ERR_PTR entries when iterating the action IDR so teardown
does not call tc_act_in_hw() on an error pointer.
Affected
13 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.18.8-1 (forky) | linux 6.18.8-1 (forky) |
| linux | linux | — | — |
| linux | linux | >= 84a7d6797e6a03705e6b48c613fa424662049d87 < 67550a1130b647bb0d093c9c0a810c69aa6a30a8 | 67550a1130b647bb0d093c9c0a810c69aa6a30a8 |
| linux | linux | >= 84a7d6797e6a03705e6b48c613fa424662049d87 < adb25a46dc0a43173f5ea5f5f58fc8ba28970c7c | adb25a46dc0a43173f5ea5f5f58fc8ba28970c7c |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 6.18.8-1 | 6.18.8-1 |
| linux | linux_kernel | >= 6.17 < 6.18.6 | 6.18.6 |
| ubuntu | linux-azure-6.17 | — | — |
| ubuntu | linux-azure-fde-6.17 | — | — |
| ubuntu | linux-gcp-6.17 | — | — |
| ubuntu | linux-oem-6.17 | — | — |
| ubuntu | linux-oracle-6.17 | — | — |
| ubuntu | linux-realtime-6.17 | — | — |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5LOW
vendor_redhat5.5MEDIUM
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Ubuntu
Linux kernel (Oracle) vulnerabilities
vendor_ubuntu·2026-07-28
CVE-2026-23057 Linux kernel (Oracle) vulnerabilities
Title: Linux kernel (Oracle) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
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:
- Foo-over-UDP (FOU);
- ARM64 architecture;
- x86 architecture;
- Block layer subsystem;
- Drivers core;
- Null block device driver;
- Bluetooth drivers;
- Counter interface drivers;
- DMA engine subsystem;
- DPLL subsystem;
- GPIO subsystem;
- GPU drivers;
- I2C subsystem;
- IIO ADC drivers;
- IIO subsystem;
- On-Chip Interconnect management framework;
- IOMMU subsystem;
- IRQ chip drivers;
- Modular ISDN driver;
- LED subsystem;
- Multiple devices driver;
- UACCE accelerator framework;
- MMC subsystem
Ubuntu
Linux kernel (Azure) vulnerabilities
vendor_ubuntu·2026-07-24
CVE-2026-23057 Linux kernel (Azure) vulnerabilities
Title: Linux kernel (Azure) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
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:
- Foo-over-UDP (FOU);
- ARM64 architecture;
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- Drivers core;
- Null block device driver;
- Bluetooth drivers;
- Counter interface drivers;
- DMA engine subsystem;
- DPLL subsystem;
- GPIO subsystem;
- GPU drivers;
- I2C subsystem;
- IIO ADC drivers;
- IIO subsystem;
- InfiniBand drivers;
- On-Chip Interconnect management framework;
- IOMMU subsystem;
- IRQ chip drivers;
- Modular ISDN driver;
- LED subsystem;
- Multiple devices driver;
- UA
Ubuntu
Linux kernel (Azure CVM) vulnerabilities
vendor_ubuntu·2026-07-24
CVE-2025-71190 Linux kernel (Azure CVM) vulnerabilities
Title: Linux kernel (Azure CVM) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
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:
- Foo-over-UDP (FOU);
- ARM64 architecture;
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- Drivers core;
- Null block device driver;
- Bluetooth drivers;
- Counter interface drivers;
- DMA engine subsystem;
- DPLL subsystem;
- GPIO subsystem;
- GPU drivers;
- I2C subsystem;
- IIO ADC drivers;
- IIO subsystem;
- InfiniBand drivers;
- On-Chip Interconnect management framework;
- IOMMU subsystem;
- IRQ chip drivers;
- Modular ISDN driver;
- LED subsystem;
- Multiple devices driver;
Ubuntu
Linux kernel (OEM) vulnerabilities
vendor_ubuntu·2026-07-23
CVE-2025-71190 Linux kernel (OEM) vulnerabilities
Title: Linux kernel (OEM) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
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:
- Foo-over-UDP (FOU);
- ARM64 architecture;
- x86 architecture;
- Block layer subsystem;
- Drivers core;
- Null block device driver;
- Bluetooth drivers;
- Counter interface drivers;
- DMA engine subsystem;
- DPLL subsystem;
- GPIO subsystem;
- GPU drivers;
- I2C subsystem;
- IIO ADC drivers;
- IIO subsystem;
- On-Chip Interconnect management framework;
- IOMMU subsystem;
- IRQ chip drivers;
- Modular ISDN driver;
- LED subsystem;
- Multiple devices driver;
- UACCE accelerator framework;
- MMC subsystem;
-
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2026-07-20
CVE-2025-71190 Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
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:
- Foo-over-UDP (FOU);
- ARM64 architecture;
- x86 architecture;
- Block layer subsystem;
- Drivers core;
- Null block device driver;
- Bluetooth drivers;
- Counter interface drivers;
- DMA engine subsystem;
- DPLL subsystem;
- GPIO subsystem;
- GPU drivers;
- I2C subsystem;
- IIO ADC drivers;
- IIO subsystem;
- On-Chip Interconnect management framework;
- IOMMU subsystem;
- IRQ chip drivers;
- Modular ISDN driver;
- LED subsystem;
- Multiple devices driver;
- UACCE accelerator framework;
- MMC subsystem;
- Ether
Red Hat
kernel: Linux kernel: Denial of Service due to invalid dereference in networking scheduler during netns teardown
vendor_redhat·2026-01-23·CVSS 5.5
CVE-2026-22987 [MEDIUM] CWE-252 kernel: Linux kernel: Denial of Service due to invalid dereference in networking scheduler during netns teardown
kernel: Linux kernel: Denial of Service due to invalid dereference in networking scheduler during netns teardown
In the Linux kernel, the following vulnerability has been resolved:
net/sched: act_api: avoid dereferencing ERR_PTR in tcf_idrinfo_destroy
syzbot reported a crash in tc_act_in_hw() during netns teardown where
tcf_idrinfo_destroy() passed an ERR_PTR(-EBUSY) value as a tc_action
pointer, leading to an invalid dereference.
Guard against ERR_PTR entries when iterating the action IDR so teardown
does not call tc_act_in_hw() on an error pointer.
A flaw was found in the Linux kernel's networking scheduler component (net/sched: act_api). A local user with low privileges could exploit this vulnerability during network namespace (netns) teardown. The tcf_idrinfo_destroy function incorre
Debian
CVE-2026-22987: linux - In the Linux kernel, the following vulnerability has been resolved: net/sched: ...
vendor_debian·2026·CVSS 5.5
CVE-2026-22987 [MEDIUM] CVE-2026-22987: linux - In the Linux kernel, the following vulnerability has been resolved: net/sched: ...
In the Linux kernel, the following vulnerability has been resolved: net/sched: act_api: avoid dereferencing ERR_PTR in tcf_idrinfo_destroy syzbot reported a crash in tc_act_in_hw() during netns teardown where tcf_idrinfo_destroy() passed an ERR_PTR(-EBUSY) value as a tc_action pointer, leading to an invalid dereference. Guard against ERR_PTR entries when iterating the action IDR so teardown does not call tc_act_in_hw() on an error pointer.
Scope: local
bookworm: resolved
bullseye: resolved
forky: resolved (fixed in 6.18.8-1)
sid: resolved (fixed in 6.18.8-1)
trixie: resolved
GHSA
GHSA-39xq-39v8-2g6g: In the Linux kernel, the following vulnerability has been resolved:
net/sched: act_api: avoid dereferencing ERR_PTR in tcf_idrinfo_destroy
syzbot re
ghsa_unreviewed·2026-01-23
CVE-2026-22987 [MEDIUM] CWE-476 GHSA-39xq-39v8-2g6g: In the Linux kernel, the following vulnerability has been resolved:
net/sched: act_api: avoid dereferencing ERR_PTR in tcf_idrinfo_destroy
syzbot re
In the Linux kernel, the following vulnerability has been resolved:
net/sched: act_api: avoid dereferencing ERR_PTR in tcf_idrinfo_destroy
syzbot reported a crash in tc_act_in_hw() during netns teardown where
tcf_idrinfo_destroy() passed an ERR_PTR(-EBUSY) value as a tc_action
pointer, leading to an invalid dereference.
Guard against ERR_PTR entries when iterating the action IDR so teardown
does not call tc_act_in_hw() on an error pointer.
OSV
CVE-2026-22987: In the Linux kernel, the following vulnerability has been resolved: net/sched: act_api: avoid dereferencing ERR_PTR in tcf_idrinfo_destroy syzbot repo
osv·2026-01-23·CVSS 5.5
CVE-2026-22987 [MEDIUM] CVE-2026-22987: In the Linux kernel, the following vulnerability has been resolved: net/sched: act_api: avoid dereferencing ERR_PTR in tcf_idrinfo_destroy syzbot repo
In the Linux kernel, the following vulnerability has been resolved: net/sched: act_api: avoid dereferencing ERR_PTR in tcf_idrinfo_destroy syzbot reported a crash in tc_act_in_hw() during netns teardown where tcf_idrinfo_destroy() passed an ERR_PTR(-EBUSY) value as a tc_action pointer, leading to an invalid dereference. Guard against ERR_PTR entries when iterating the action IDR so teardown does not call tc_act_in_hw() on an error pointer.
No detection rules found.
No public exploits indexed.
2026-01-23
Published