CVE-2026-72489

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxd6bdcf2e1019351cbc176e963b7756766bdd8721 < 6b2ea886ebdae44a2394029844a4e78f58e1587daffected
LinuxLinuxd6bdcf2e1019351cbc176e963b7756766bdd8721 < a37625c7b688fcf68a54263528eccbabfd7fa17aaffected
LinuxLinuxd6bdcf2e1019351cbc176e963b7756766bdd8721 < 9f7fe4165a1f1014bdadc8e744c0fd3c2d8c0b89affected
LinuxLinuxd6bdcf2e1019351cbc176e963b7756766bdd8721 < 08626fcfe12308ca3f8b22c538ba7dee0b2dce7aaffected
LinuxLinuxd6bdcf2e1019351cbc176e963b7756766bdd8721 < f19a5bc059051143c489dd6f79a0f9c3bfd13aeaaffected
LinuxLinuxd6bdcf2e1019351cbc176e963b7756766bdd8721 < bb3d592c7d6c4ec8ac6640c690ca13298e7e8e90affected
LinuxLinuxd6bdcf2e1019351cbc176e963b7756766bdd8721 < 5de04caa46b635e180cecbd164e333eca535db94affected
LinuxLinuxd6bdcf2e1019351cbc176e963b7756766bdd8721 < 26813881181deb3a32fbb59eadb2599cbe8423f6affected
LinuxLinux3.2affected
LinuxLinux0 < 3.2unaffected
LinuxLinux5.10.261 <= 5.10.*unaffected
LinuxLinux5.15.212 <= 5.15.*unaffected
LinuxLinux6.1.178 <= 6.1.*unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.97 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References