RDMA/cxgb4: Fix dereg_skb leak and double free in write_tpt_entry()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-90417
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:17:46 UTC
Updated2026-09-17 17:17:46 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: RDMA/cxgb4: Fix dereg_skb leak and double free in write_tpt_entry() When the device is in the fatal error state, write_tpt_entry() returns -EIO before handing the caller's preallocated skb to the transmit path; its allocation-failure returns do the same. c4iw_dereg_mr() ignores the error and frees mhp, leaking mhp->dereg_skb. c4iw_get_dma_mr() instead frees the skb a second time after dereg_mem() already consumed it, a double free. Make write_tpt_entry() the sole owner of a non-NULL skb, freeing it on every return preceding handoff to c4iw_ofld_send(): fatal error, tpt and stag allocation failure. c4iw_ofld_send() consumes the skb on success and error alike, so drop the redundant kfree_skb() in c4iw_get_dma_mr() after dereg_mem().

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 0f8ab0b6e91b4d5302ceee5ec12ce54d81297635 6b15fc9bc117fb6597fa1c2cc30284aafe71101c git Not specified
CNA Linux Linux affected 0f8ab0b6e91b4d5302ceee5ec12ce54d81297635 373f3716a2de7adc739269ebb4d87e5bf4dc180c git Not specified
CNA Linux Linux affected 4.8 Not specified
CNA Linux Linux unaffected 4.8 semver Not specified
CNA Linux Linux unaffected 7.2.6 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/6b15fc9bc117fb6597fa1c2cc30284aafe71101c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/373f3716a2de7adc739269ebb4d87e5bf4dc180c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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