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CVE-2026-72489

HIGHCVSS 8.4/10EPSS 0.18%

Last modified

CVE-2026-72489 is a high-severity vulnerability rated 8.4/10 on the CVSS scale. In the Linux kernel, the following vulnerability has been resolved: staging: nvec: fix use-after-free in nvec_rx_completed() In nvec_rx_completed(), when an incomplete RX transfer is detected, nvec_msg_free() is called to return the message back to the pool by clearing its 'used' atomic flag. Immediately after this, the code accesses nvec->rx->data[0] to check the message type. Since nvec_msg_free() marks the pool slot as available via atomic_set(), any concurrent or subsequent call to nvec_msg_alloc() could claim that same slot and overwrite its data[] array. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: staging: nvec: fix use-after-free in nvec_rx_completed() In nvec_rx_completed(), when an incomplete RX transfer is detected, nvec_msg_free() is called to return the message back to the pool by clearing its 'used' atomic flag. Immediately after this, the code accesses nvec->rx->data[0] to check the message type. Since nvec_msg_free() marks the pool slot as available via atomic_set(), any concurrent or subsequent call to nvec_msg_alloc() could claim that same slot and overwrite its data[] array. Reading nvec->rx->data[0] after freeing the message is therefore a use-after-free. Fix this by saving the message type byte before calling nvec_msg_free(), then using the saved value for the battery quirk check.

Metrics

CVSS 3.1
8.4/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.18%

8.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= d6bdcf2e1019351cbc176e963b7756766bdd8721, < 6b2ea886ebdae44a2394029844a4e78f58e1587d; >= d6bdcf2e1019351cbc176e963b7756766bdd8721, < a37625c7b688fcf68a54263528eccbabfd7fa17a; >= d6bdcf2e1019351cbc176e963b7756766bdd8721, < 9f7fe4165a1f1014bdadc8e744c0fd3c2d8c0b89; >= d6bdcf2e1019351cbc176e963b7756766bdd8721, < 08626fcfe12308ca3f8b22c538ba7dee0b2dce7a; >= d6bdcf2e1019351cbc176e963b7756766bdd8721, < f19a5bc059051143c489dd6f79a0f9c3bfd13aea; >= d6bdcf2e1019351cbc176e963b7756766bdd8721, < bb3d592c7d6c4ec8ac6640c690ca13298e7e8e90; >= d6bdcf2e1019351cbc176e963b7756766bdd8721, < 5de04caa46b635e180cecbd164e333eca535db94; >= d6bdcf2e1019351cbc176e963b7756766bdd8721, < 26813881181deb3a32fbb59eadb2599cbe8423f6
LinuxLinux3.2

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-72489?
In the Linux kernel, the following vulnerability has been resolved: staging: nvec: fix use-after-free in nvec_rx_completed() In nvec_rx_completed(), when an incomplete RX transfer is detected, nvec_msg_free() is called to return the message back to the pool by clearing its 'used' atomic flag. Immediately after this, the code accesses nvec->rx->data[0] to check the message type. Since nvec_msg_free() marks the pool slot as available via atomic_set(), any concurrent or subsequent call to nvec_msg_alloc() could claim that same slot and overwrite its data[] array. Reading nvec->rx->data[0] after freeing the message is therefore a use-after-free. Fix this by saving the message type byte before calling nvec_msg_free(), then using the saved value for the battery quirk check.
How severe is CVE-2026-72489?
CVE-2026-72489 has a CVSS score of 8.4/10 (HIGH severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.
How do I fix CVE-2026-72489?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST