CVE-2026-43445 (GCVE-0-2026-43445)
Vulnerability from cvelistv5
Published
2026-05-08 14:22
Modified
2026-05-11 22:24
Severity ?
VLAI Severity ?
EPSS score ?
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.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: c1fa347f20f17f14a4a1575727fa24340e8a9117 Version: c1fa347f20f17f14a4a1575727fa24340e8a9117 Version: c1fa347f20f17f14a4a1575727fa24340e8a9117 Version: c1fa347f20f17f14a4a1575727fa24340e8a9117 Version: c1fa347f20f17f14a4a1575727fa24340e8a9117 Version: c1fa347f20f17f14a4a1575727fa24340e8a9117 Version: c1fa347f20f17f14a4a1575727fa24340e8a9117 Version: c1fa347f20f17f14a4a1575727fa24340e8a9117 |
||
{
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ne1000/e1000e: Fix leak in DMA error cleanup\n\nIf an error is encountered while mapping TX buffers, the driver should\nunmap any buffers already mapped for that skb.\n\nBecause count is incremented after a successful mapping, it will always\nmatch the correct number of unmappings needed when dma_error is reached.\nDecrementing count before the while loop in dma_error causes an\noff-by-one error. If any mapping was successful before an unsuccessful\nmapping, exactly one DMA mapping would leak.\n\nIn these commits, a faulty while condition caused an infinite loop in\ndma_error:\nCommit 03b1320dfcee (\"e1000e: remove use of skb_dma_map from e1000e\ndriver\")\nCommit 602c0554d7b0 (\"e1000: remove use of skb_dma_map from e1000 driver\")\n\nCommit c1fa347f20f1 (\"e1000/e1000e/igb/igbvf/ixgb/ixgbe: Fix tests of\nunsigned in *_tx_map()\") fixed the infinite loop, but introduced the\noff-by-one error.\n\nThis issue may still exist in the igbvf driver, but I did not address it\nin this patch."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T22:24:43.676Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"references": [
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"url": "https://git.kernel.org/stable/c/7eaeb778bfaa3b2a804f89321c234d59c74569db"
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{
"url": "https://git.kernel.org/stable/c/0606c24a745bafd1be5d66c48361638cd9cad74b"
},
{
"url": "https://git.kernel.org/stable/c/519051c711dfd239ef6e4b28878efee400a035f9"
},
{
"url": "https://git.kernel.org/stable/c/0a1fc25deabab4efce64610e3c449485c4fa8f5f"
},
{
"url": "https://git.kernel.org/stable/c/fa5ba9867a55e640df0dc79bf0199770fb043f03"
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{
"url": "https://git.kernel.org/stable/c/30e87ade8d678c25a8546cf38c0b498fa5cb27d3"
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{
"url": "https://git.kernel.org/stable/c/10b5e65959e955a1c8894e0a5413944b5a70204a"
},
{
"url": "https://git.kernel.org/stable/c/e94eaef11142b01f77bf8ba4d0b59720b7858109"
}
],
"title": "e1000/e1000e: Fix leak in DMA error cleanup",
"x_generator": {
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"cveMetadata": {
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"assignerShortName": "Linux",
"cveId": "CVE-2026-43445",
"datePublished": "2026-05-08T14:22:12.660Z",
"dateReserved": "2026-05-01T14:12:56.010Z",
"dateUpdated": "2026-05-11T22:24:43.676Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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