{"id":"CVE-2026-43445","title":"e1000/e1000e: Fix leak in DMA error cleanup","summary":"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\nBeca…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= c1fa347f20f17f14a4a1575727fa24340e8a9117 < 7eaeb778bfaa3b2a804f89321c234d59c74569db","Linux >= c1fa347f20f17f14a4a1575727fa24340e8a9117 < 0606c24a745bafd1be5d66c48361638cd9cad74b","Linux >= c1fa347f20f17f14a4a1575727fa24340e8a9117 < 519051c711dfd239ef6e4b28878efee400a035f9","Linux >= c1fa347f20f17f14a4a1575727fa24340e8a9117 < 0a1fc25deabab4efce64610e3c449485c4fa8f5f","Linux >= c1fa347f20f17f14a4a1575727fa24340e8a9117 < fa5ba9867a55e640df0dc79bf0199770fb043f03","Linux >= c1fa347f20f17f14a4a1575727fa24340e8a9117 < 30e87ade8d678c25a8546cf38c0b498fa5cb27d3","Linux >= c1fa347f20f17f14a4a1575727fa24340e8a9117 < 10b5e65959e955a1c8894e0a5413944b5a70204a","Linux >= c1fa347f20f17f14a4a1575727fa24340e8a9117 < e94eaef11142b01f77bf8ba4d0b59720b7858109","Linux 2.6.33"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T15:39:00.489379Z"},"published":"2026-05-08","updated":"2026-11-06","sourceUpdated":"2026-11-06T15:42:54.712Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43445","references":[{"url":"https://git.kernel.org/stable/c/7eaeb778bfaa3b2a804f89321c234d59c74569db"},{"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"},{"url":"https://git.kernel.org/stable/c/30e87ade8d678c25a8546cf38c0b498fa5cb27d3"},{"url":"https://git.kernel.org/stable/c/10b5e65959e955a1c8894e0a5413944b5a70204a"},{"url":"https://git.kernel.org/stable/c/e94eaef11142b01f77bf8ba4d0b59720b7858109"}],"tags":["cve.org"],"epss":0.00123,"epssPercentile":0.0205,"ingestedAt":"2026-11-06T15:54:03.908Z","slug":"CVE-2026-43445","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= c1fa347f20f17f14a4a1575727fa24340e8a9117 < 7eaeb778bfaa3b2a804f89321c234d59c74569db`\n- `Linux >= c1fa347f20f17f14a4a1575727fa24340e8a9117 < 0606c24a745bafd1be5d66c48361638cd9cad74b`\n- `Linux >= c1fa347f20f17f14a4a1575727fa24340e8a9117 < 519051c711dfd239ef6e4b28878efee400a035f9`\n- `Linux >= c1fa347f20f17f14a4a1575727fa24340e8a9117 < 0a1fc25deabab4efce64610e3c449485c4fa8f5f`\n- `Linux >= c1fa347f20f17f14a4a1575727fa24340e8a9117 < fa5ba9867a55e640df0dc79bf0199770fb043f03`\n- `Linux >= c1fa347f20f17f14a4a1575727fa24340e8a9117 < 30e87ade8d678c25a8546cf38c0b498fa5cb27d3`\n- `Linux >= c1fa347f20f17f14a4a1575727fa24340e8a9117 < 10b5e65959e955a1c8894e0a5413944b5a70204a`\n- `Linux >= c1fa347f20f17f14a4a1575727fa24340e8a9117 < e94eaef11142b01f77bf8ba4d0b59720b7858109`\n- `Linux 2.6.33`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}