Medium 5.5Published May 8, 2026

CVE-2026-43445e1000/e1000e: Fix leak in DMA error cleanup

Updated under an hour ago (Oct 27, 2026, 4:50 AM ET)

Does this affect you?

It affects Linux and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from c1fa347f20f17f14a4a1575727fa24340e8a9117 before 7eaeb778bfaa3b2a804f89321c234d59c74569db; from c1fa347f20f17f14a4a1575727fa24340e8a9117 before 0606c24a745bafd1be5d66c48361638cd9cad74b; from c1fa347f20f17f14a4a1575727fa24340e8a9117 before 519051c711dfd239ef6e4b28878efee400a035f9; from c1fa347f20f17f14a4a1575727fa24340e8a9117 before 0a1fc25deabab4efce64610e3c449485c4fa8f5f; from c1fa347f20f17f14a4a1575727fa24340e8a9117 before fa5ba9867a55e640df0dc79bf0199770fb043f03; from c1fa347f20f17f14a4a1575727fa24340e8a9117 before 30e87ade8d678c25a8546cf38c0b498fa5cb27d3; from c1fa347f20f17f14a4a1575727fa24340e8a9117 before 10b5e65959e955a1c8894e0a5413944b5a70204a; from c1fa347f20f17f14a4a1575727fa24340e8a9117 before e94eaef11142b01f77bf8ba4d0b59720b7858109	CNA record
linux linux_kernel linux:linux_kernel	from 2.6.33.1 before 5.10.253; from 5.11 before 5.15.203; from 5.16 before 6.1.167; from 6.2 before 6.6.130; from 6.7 before 6.12.78; from 6.13 before 6.18.19; from 6.19 before 6.19.9; 2.6.33; and 6 more ranges	NVD

References

References

https://git.kernel.org/stable/c/7eaeb778bfaa3b2a804f89321c234d59c74569db	patch
https://git.kernel.org/stable/c/0606c24a745bafd1be5d66c48361638cd9cad74b	patch
https://git.kernel.org/stable/c/519051c711dfd239ef6e4b28878efee400a035f9	patch
https://git.kernel.org/stable/c/0a1fc25deabab4efce64610e3c449485c4fa8f5f	patch
https://git.kernel.org/stable/c/fa5ba9867a55e640df0dc79bf0199770fb043f03	patch
https://git.kernel.org/stable/c/30e87ade8d678c25a8546cf38c0b498fa5cb27d3	patch
https://git.kernel.org/stable/c/10b5e65959e955a1c8894e0a5413944b5a70204a	patch
https://git.kernel.org/stable/c/e94eaef11142b01f77bf8ba4d0b59720b7858109	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.