CVE-2026-43445
Vulnérabilité non évaluée dans Linux (Linux)
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.
Gravité et risque d'exploitation
CVE-2026-43445 obtient un score CVSS de 0.0/10, soit une gravité non évaluée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.16 %, ce qui la place devant 5.1 % des CVE référencées.
Que faire ?
- Vérifiez si Linux (versions <=6.1.*, <e94eaef11142b01f77bf8ba4d0b59720b7858109, <=6.12.*, 6.12.78, 0, 7.0, 6.18.19, <=5.10.*, <=6.6.*, <fa5ba9867a55e640df0dc79bf0199770fb043f03, <=6.19.*, <519051c711dfd239ef6e4b28878efee400a035f9, <10b5e65959e955a1c8894e0a5413944b5a70204a, 5.15.203, <2.6.33, 6.19.9, c1fa347f20f17f14a4a1575727fa24340e8a9117, 2.6.33, <0606c24a745bafd1be5d66c48361638cd9cad74b, <=6.18.*, <7eaeb778bfaa3b2a804f89321c234d59c74569db, 6.1.167, <=*, <0a1fc25deabab4efce64610e3c449485c4fa8f5f, 5.10.253, <=5.15.*, <30e87ade8d678c25a8546cf38c0b498fa5cb27d3, 6.6.130) est présent sur votre parc.
- Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
- À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
- Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.
Références
- 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