e1000/e1000e: Fix leak in DMA error cleanup
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 4 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-401.
Summary
In the Linux kernel, the following vulnerability has been resolved: e1000/e1000e: Fix leak in DMA error cleanup If an error is encountered while mapping TX buffers, the driver should unmap any buffers already mapped for that skb. Because count is incremented after a successful mapping, it will always match the correct number of unmappings needed when dma_error is reached. Decrementing count before the while loop in dma_error causes an off-by-one error. If any mapping was successful before an unsuccessful mapping, exactly one DMA mapping would leak. In these commits, a faulty while condition caused an infinite loop in dma_error: Commit 03b1320dfcee ("e1000e: remove use of skb_dma_map from e1000e driver") Commit 602c0554d7b0 ("e1000: remove use of skb_dma_map from e1000 driver") Commit c1fa347f20f1 ("e1000/e1000e/igb/igbvf/ixgb/ixgbe: Fix tests of unsigned in *_tx_map()") fixed the infinite loop, but introduced the off-by-one error. This issue may still exist in the igbvf driver, but I did not address it in this patch.
Why it matters now
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 | 2.6.33 and later | 5.10.253, 5.15.203, 6.1.167, 6.6.130, 6.12.78, 6.18.19, 6.19.9, 7.0 | Patch available | CNA |
- Linux VendorLinux Affected 2.6.33 and later Fixed in 5.10.253, 5.15.203, 6.1.167, 6.6.130, 6.12.78, 6.18.19, 6.19.9, 7.0 Patch available CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 2.6.33.1 to before 5.10.253; 5.11 to before 5.15.203; 5.16 to before 6.1.167; 6.2 to before 6.6.130; 6.7 to before 6.12.78; 6.13 to before 6.18.19; 6.19 to before 6.19.9 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.33:-:*:*:*:*:*:* | 2.6.33 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.33:rc6:*:*:*:*:*:* | 2.6.33 rc6 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.33:rc7:*:*:*:*:*:* | 2.6.33 rc7 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.33:rc8:*:*:*:*:*:* | 2.6.33 rc8 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* | 7.0 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* | 7.0 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* | 7.0 rc3 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 2.6.33.1 to before 5.10.253; 5.11 to before 5.15.203; 5.16 to before 6.1.167; 6.2 to before 6.6.130; 6.7 to before 6.12.78; 6.13 to before 6.18.19; 6.19 to before 6.19.9 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.33:-:*:*:*:*:*:* Versions 2.6.33 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.33:rc6:*:*:*:*:*:* Versions 2.6.33 rc6 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.33:rc7:*:*:*:*:*:* Versions 2.6.33 rc7 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.33:rc8:*:*:*:*:*:* Versions 2.6.33 rc8 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* Versions 7.0 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* Versions 7.0 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* Versions 7.0 rc3 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.253, 5.15.203, 6.1.167, 6.6.130, 6.12.78, 6.18.19, 6.19.9, 7.0
Vendor assessments
Red Hat
Red Hat rating: Moderate. 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 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix planned: Out of support scope |
Not affected: 1 product
- Red Hat Enterprise Linux 6
Timeline
- 2026-10-02 Threatist record created from CVE-2026-43445
- 2026-10-03 Alias added: GHSA-fg4c-9xcm-vp9q
- 2026-11-06 CISA SSVC decision points changed
References
Patch 8
- https://git.kernel.org/stable/c/7eaeb778bfaa3b2a804f89321c234d59c74569db
- https://git.kernel.org/stable/c/0606c24a745bafd1be5d66c48361638cd9cad74b
- https://git.kernel.org/stable/c/519051c711dfd239ef6e4b28878efee400a035f9
- https://git.kernel.org/stable/c/0a1fc25deabab4efce64610e3c449485c4fa8f5f
- https://git.kernel.org/stable/c/fa5ba9867a55e640df0dc79bf0199770fb043f03
- https://git.kernel.org/stable/c/30e87ade8d678c25a8546cf38c0b498fa5cb27d3
- https://git.kernel.org/stable/c/10b5e65959e955a1c8894e0a5413944b5a70204a
- https://git.kernel.org/stable/c/e94eaef11142b01f77bf8ba4d0b59720b7858109
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- 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-2026-43445 · CVE Program
- CVE-2026-43445 · NVD
- FIRST EPSS
- GHSA-fg4c-9xcm-vp9q · GitHub Advisory Database · CC BY 4.0
- CVE-2026-43445 · Red Hat security data · CC BY 4.0
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