VulnSocial

CVE-2026-52908Disclosure(linux / linux_kernel)

LOWCVSS 7.8 · HIGH

Signal is active with 2 mentions in latest observed window

Immediate actions

  • Patch linux linux_kernel systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

In the Linux kernel, the following vulnerability has been resolved: RDMA: During rereg_mr ensure that REREG_ACCESS is compatible If IB_MR_REREG_ACCESS changes from RO to RW then the umem has to be re-evaluated to ensure it is properly pinned as RW. Since the umem is hidden inside each driver's mr struct add a ib_umem_check_rereg() function that each driver has to call before processing IB_MR_REREG_ACCESS. mlx4 has to retain its duplicate ib_access_writable check because it implements IB_MR_REREG_ACCESS | IB_MR_REREG_TRANS by changing both items in place sequentially while the MR is live, so it will continue to not support this combination.

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0.5/ 10 priority

Sources & remediation

Patch / fix

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • linux_kernel

Threat summary

  • Patch or workaround signal is available
  • 5 mentions across 3 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 3 signals
  • Disclosure: 2 classified signals
  • General: 1 classified signal
  • Peaked 2d ago at 2 mentions (2026-06-19); latest day: 2
  • 5 total mentions across 3 days

Affected systems

Vendors
linux
Products
linux_kernel

1 version affected across 1 product

Deep dive

Activity timeline5 mentions / 3d
01122Mentions · 2026-06-19: 2Mentions · 2026-06-21: 1Mentions · 2026-06-22: 2Patch / Workaround · 2026-06-22: 1Technical Details · 2026-06-19: 1Technical Details · 2026-06-22: 206-1906-2106-22
Signal classification3 categories
Disclosure
240.0%
Patch
240.0%
General
120.0%
Referenced assets7 URLs
Classification over time
DateTotalLabels
2026-06-192
Disclosure1General1
2026-06-211
Disclosure1
2026-06-222
Patch2
Full discourse5 posts
  • Philip Tsukerman@PhilipTsukerman
    Disclosure

    I've recently channeled my inner @calif_io to find a nice little vulnerability - It's a rather distant cousin of CopyFail (same kind of impact, different underlying mechanisms) which abuses RDMA on Linux. Will hopefully blog about it soon :) https://www.cve.org/CVERecord/?id=CVE-2026-52908

    Post summary

    User announced discovery of a new Linux RDMA vulnerability resembling CopyFail, without providing PoC, exploit, patch, or exploitation evidence.

    0603164.1K
    3.4K followersView on X
  • Brad Spengler@spendergrsec
    Disclosure

    A CVE so nice they announced it twice: https://lore.kernel.org/linux-cve-announce/2026061935-CVE-2026-52908-ecea@gregkh/T/#u https://lore.kernel.org/linux-cve-announce/2026061932-CVE-2026-52908-fb97@gregkh/T/#u and the cBPF CVE delayed for over a month past when people were able to exploit it with public info: https://lore.kernel.org/linux-cve-announce/2026061934-CVE-2026-52910-aef2@gregkh/T/#u https://t.co/5lUdtsjxJx

    Post summary

    The post highlights the dual announcement of CVE‑2026‑52908 and the delayed disclosure of CVE‑2026‑52910, noting that public exploitation information is available, but offers no technical, exploit, or patch details.

    2102273.3K
    7.1K followersView on X
  • CVE@CVEnew
    Patch

    CVE-2026-52908 In the Linux kernel, the following vulnerability has been resolved: RDMA: During rereg_mr ensure that REREG_ACCESS is compatible If IB_MR_REREG_ACCESS changes from … https://www.cve.org/CVERecord?id=CVE-2026-52908

    Post summary

    The Linux kernel vuln CVE-2026-52908 has been fixed, with the patch ensuring RDMA rereg_mr REREG_ACCESS compatibility; no PoC or exploit details are provided.

    00010803
    57.7K followersView on X
  • Infoflowcloud@infoflowcloud
    Patch

    🚨*CVE* CVE-2026-52908 In the Linux kernel, the following vulnerability has been resolved: RDMA: During rereg_mr ensure that REREG_ACCESS is compatible If IB_MR_REREG_ACCESS changes from … https://www.cve.org/CVERecord?id=CVE-2026-52908 ----- Traducción: CVE-2026-52908 En … http://infoflow.cloud`

    Post summary

    The post announces that CVE‑2026‑52908 in the Linux kernel has been resolved, includes a brief technical snippet, but offers no PoC, exploit, or detailed patch information.

    0000041
    88 followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    General

    CVE-2026-52908 RDMA Memory Registration Access Compatibility Issue in Linux Kernel https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-52908

    Post summary

    A brief mention of CVE‑2026‑52908, describing it as an RDMA memory registration access compatibility issue in the Linux kernel, without additional details or actionable information.

    0000053
    4.1K followersView on X
CPE platform detail8 entries

8 of 8 entries

PartVendorProductVersionTarget SWTarget HW
OSlinuxlinux_kernel---
OSlinuxlinux_kernel7.1--
OSlinuxlinux_kernel7.1--
OSlinuxlinux_kernel7.1--
OSlinuxlinux_kernel7.1--
OSlinuxlinux_kernel7.1--
OSlinuxlinux_kernel7.1--
OSlinuxlinux_kernel7.1--

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