net/sched: netem: fix queue limit check to include reordered packets
Priority LOW 24Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 3 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: net/sched: netem: fix queue limit check to include reordered packets The queue limit check in netem_enqueue() uses q->t_len which only counts packets in the internal tfifo. Packets placed in sch->q by the reorder path (__qdisc_enqueue_head) are not counted, allowing the total queue occupancy to exceed sch->limit under reordering. Include sch->q.qlen in the limit check.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00128 2nd percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.10.258, 5.15.209, 6.1.175 +6Red Hat: 3 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.10.232 to before 5.10.258; 5.15.175 to before 5.15.209; 6.1.121 to before 6.1.175; 6.6.67 to before 6.6.141; 6.12.6 to before 6.12.91; 5.4.288 to before 5.5 | 5.10.258, 5.15.209, 6.1.175, 6.6.141, 6.12.91, 5.5 | Patch available | CNA |
| Linux | Linux | 6.13 and later | 5.10.258, 5.15.209, 6.1.175, 6.6.141, 6.12.91, 6.18.33, 7.0.10, 7.1 | Patch available | CNA |
- Linux VendorLinux Affected 5.10.232 to before 5.10.258; 5.15.175 to before 5.15.209; 6.1.121 to before 6.1.175; 6.6.67 to before 6.6.141; 6.12.6 to before 6.12.91; 5.4.288 to before 5.5 Fixed in 5.10.258, 5.15.209, 6.1.175, 6.6.141, 6.12.91, 5.5 Patch available CNA
- Linux VendorLinux Affected 6.13 and later Fixed in 5.10.258, 5.15.209, 6.1.175, 6.6.141, 6.12.91, 6.18.33, 7.0.10, 7.1 Patch available CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.4.288 to before 5.5; 5.10.232 to before 5.10.258; 5.15.175 to before 5.15.209; 6.1.121 to before 6.1.175; 6.6.67 to before 6.6.141; 6.12.6 to before 6.12.91; 6.13.1 to before 6.18.33; 6.19 to before 7.0.10 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.13:-:*:*:*:*:*:* | 6.13 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:* | 6.13 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.13:rc4:*:*:*:*:*:* | 6.13 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.13:rc5:*:*:*:*:*:* | 6.13 rc5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.13:rc6:*:*:*:*:*:* | 6.13 rc6 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.13:rc7:*:*:*:*:*:* | 6.13 rc7 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* | 7.1 rc1 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.4.288 to before 5.5; 5.10.232 to before 5.10.258; 5.15.175 to before 5.15.209; 6.1.121 to before 6.1.175; 6.6.67 to before 6.6.141; 6.12.6 to before 6.12.91; 6.13.1 to before 6.18.33; 6.19 to before 7.0.10 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.13:-:*:*:*:*:*:* Versions 6.13 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:* Versions 6.13 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.13:rc4:*:*:*:*:*:* Versions 6.13 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.13:rc5:*:*:*:*:*:* Versions 6.13 rc5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.13:rc6:*:*:*:*:*:* Versions 6.13 rc6 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.13:rc7:*:*:*:*:*:* Versions 6.13 rc7 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* Versions 7.1 rc1 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.258, 5.15.209, 6.1.175, 6.6.141, 6.12.91, 5.5
- Fix · CNA Linux (Linux) Fixed in 5.10.258, 5.15.209, 6.1.175, 6.6.141, 6.12.91, 6.18.33, 7.0.10, 7.1
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Not affected: 3 products
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2026-52984
- 2026-10-03 Alias added: GHSA-29w2-r4qv-vcrw
- 2026-10-29 Affected versions changed · Red Hat
- 2026-11-06 CISA SSVC decision points changed
References
Patch 8
- https://git.kernel.org/stable/c/0f875d52db4c921da610e481b72f03cc82fdcb72
- https://git.kernel.org/stable/c/ef9a41b3870fb90577da5b2de5bd140022d4021e
- https://git.kernel.org/stable/c/74fcd8e127200a50ee22ba2b45c164722bdb9177
- https://git.kernel.org/stable/c/39a66e83ea41fe845631eeb8d326953de27d13f9
- https://git.kernel.org/stable/c/54b5dbacd00dedffd5e2eed76de1c3839996b5e6
- https://git.kernel.org/stable/c/8450462eaf91d5d2a9e863507b16d18e814baef3
- https://git.kernel.org/stable/c/936a7dd87251f6f3e88983350833edf60fe6a80b
- https://git.kernel.org/stable/c/4185701fcce6b426b6c3630b25330dddd9c47b0d
More Linux Kernel vulnerabilities
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- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2026-52984 · CVE Program
- CVE-2026-52984 · NVD
- FIRST EPSS
- GHSA-29w2-r4qv-vcrw · GitHub Advisory Database · CC BY 4.0
- CVE-2026-52984 · Red Hat security data · CC BY 4.0
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