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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2026-45852

RDMA/rxe: Fix double free in rxe_srq_from_init

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix double free in rxe_srq_from_init In rxe_srq_from_init(), the queue pointer 'q' is assigned to 'srq->rq.queue' before copying the SRQ number to user space. If copy_to_user() fails, the function calls rxe_queue_cleanup() to free the queue, but leaves the now-invalid pointer in 'srq->rq.queue'. The caller of rxe_srq_from_init() (rxe_create_srq) eventually calls rxe_srq_cleanup() upon receiving the error, which triggers a second rxe_queue_cleanup() on the same memory, leading to a double free. The call trace looks like this: kmem_cache_free+0x.../0x... rxe_queue_cleanup+0x1a/0x30 [rdma_rxe] rxe_srq_cleanup+0x42/0x60 [rdma_rxe] rxe_elem_release+0x31/0x70 [rdma_rxe] rxe_create_srq+0x12b/0x1a0 [rdma_rxe] ib_create_srq_user+0x9a/0x150 [ib_core] Fix this by moving 'srq->rq.queue = q' after copy_to_user.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • aae0484e15f062ad2c2502e68e15dfb8b8f84608 to < b98ab5494dbd48652561aa0b9c32f10500220745affected
  • aae0484e15f062ad2c2502e68e15dfb8b8f84608 to < d493e0bfc748a520c349d6c8791b262aa5ad2e4eaffected
  • aae0484e15f062ad2c2502e68e15dfb8b8f84608 to < 9abff51163aa1bc275ec356f74fe976291860a7faffected
  • aae0484e15f062ad2c2502e68e15dfb8b8f84608 to < 26793db60925df1e88a29466813d586cbc190b8caffected
  • aae0484e15f062ad2c2502e68e15dfb8b8f84608 to < ce6f8e007682f378279d4cf83b240f12d52c723baffected
  • aae0484e15f062ad2c2502e68e15dfb8b8f84608 to < 5c07aef09a121a4cd622a71eb0753a9e135c84a8affected
  • aae0484e15f062ad2c2502e68e15dfb8b8f84608 to < 26a9cfe12f4ffdeaa136f252478986fa5f397ddcaffected
  • aae0484e15f062ad2c2502e68e15dfb8b8f84608 to < 0beefd0e15d962f497aad750b2d5e9c3570b66d1affected
  • 350703fae672d4d649c3562c199eab5ec9dc7c79affected
  • 4.19.86 to < 4.20affected

Linux Linux

Default version status: affected

  • 4.20affected
  • 0 to < 4.20unaffected
  • 5.10.259 to ≤ 5.10.*unaffected
  • 5.15.210 to ≤ 5.15.*unaffected
  • 6.1.176 to ≤ 6.1.*unaffected
  • 6.6.128 to ≤ 6.6.*unaffected
  • 6.12.75 to ≤ 6.12.*unaffected
  • 6.18.14 to ≤ 6.18.*unaffected
  • 6.19.4 to ≤ 6.19.*unaffected
  • 7.0 to ≤ *unaffected

References