CVE-2026-43445

e1000/e1000e: Fix leak in DMA error cleanup

State: Published
Severity: Not scored
Published: May 8, 2026
Updated: May 11, 2026
Reserved: May 1, 2026

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	c1fa347f20f17f14a4a1575727fa24340e8a9117 to before 7eaeb778bfaa3b2a804f89321c234d59c74569dbAffected c1fa347f20f17f14a4a1575727fa24340e8a9117 to before 0606c24a745bafd1be5d66c48361638cd9cad74bAffected c1fa347f20f17f14a4a1575727fa24340e8a9117 to before 519051c711dfd239ef6e4b28878efee400a035f9Affected c1fa347f20f17f14a4a1575727fa24340e8a9117 to before 0a1fc25deabab4efce64610e3c449485c4fa8f5fAffected c1fa347f20f17f14a4a1575727fa24340e8a9117 to before fa5ba9867a55e640df0dc79bf0199770fb043f03Affected c1fa347f20f17f14a4a1575727fa24340e8a9117 to before 30e87ade8d678c25a8546cf38c0b498fa5cb27d3Affected c1fa347f20f17f14a4a1575727fa24340e8a9117 to before 10b5e65959e955a1c8894e0a5413944b5a70204aAffected c1fa347f20f17f14a4a1575727fa24340e8a9117 to before e94eaef11142b01f77bf8ba4d0b59720b7858109Affected
LinuxLinux	2.6.33Affected before 2.6.33Not affected 5.10.253 through 5.10.Not affected 5.15.203 through 5.15.Not affected 6.1.167 through 6.1.Not affected 6.6.130 through 6.6.Not affected 6.12.78 through 6.12.Not affected 6.18.19 through 6.18.Not affected 6.19.9 through 6.19.*Not affected 7.0 and laterNot affected

Product

Versions

LinuxLinux

c1fa347f20f17f14a4a1575727fa24340e8a9117 to before 7eaeb778bfaa3b2a804f89321c234d59c74569dbAffected
c1fa347f20f17f14a4a1575727fa24340e8a9117 to before 0606c24a745bafd1be5d66c48361638cd9cad74bAffected
c1fa347f20f17f14a4a1575727fa24340e8a9117 to before 519051c711dfd239ef6e4b28878efee400a035f9Affected
c1fa347f20f17f14a4a1575727fa24340e8a9117 to before 0a1fc25deabab4efce64610e3c449485c4fa8f5fAffected
c1fa347f20f17f14a4a1575727fa24340e8a9117 to before fa5ba9867a55e640df0dc79bf0199770fb043f03Affected
c1fa347f20f17f14a4a1575727fa24340e8a9117 to before 30e87ade8d678c25a8546cf38c0b498fa5cb27d3Affected
c1fa347f20f17f14a4a1575727fa24340e8a9117 to before 10b5e65959e955a1c8894e0a5413944b5a70204aAffected
c1fa347f20f17f14a4a1575727fa24340e8a9117 to before e94eaef11142b01f77bf8ba4d0b59720b7858109Affected

LinuxLinux

2.6.33Affected
before 2.6.33Not affected
5.10.253 through 5.10.*Not affected
5.15.203 through 5.15.*Not affected
6.1.167 through 6.1.*Not affected
6.6.130 through 6.6.*Not affected
6.12.78 through 6.12.*Not affected
6.18.19 through 6.18.*Not affected
6.19.9 through 6.19.*Not affected
7.0 and laterNot affected

References

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