Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected d6bdcf2e1019351cbc176e963b7756766bdd8721 before 6b2ea886ebdae44a2394029844a4e78f58e1587d; affected d6bdcf2e1019351cbc176e963b7756766bdd8721 before a37625c7b688fcf68a54263528eccbabfd7fa17a; affected d6bdcf2e1019351cbc176e963b7756766bdd8721 before 9f7fe4165a1f1014bdadc8e744c0fd3c2d8c0b89; affected d6bdcf2e1019351cbc176e963b7756766bdd8721 before 08626fcfe12308ca3f8b22c538ba7dee0b2dce7a; affected d6bdcf2e1019351cbc176e963b7756766bdd8721 before f19a5bc059051143c489dd6f79a0f9c3bfd13aea; affected d6bdcf2e1019351cbc176e963b7756766bdd8721 before bb3d592c7d6c4ec8ac6640c690ca13298e7e8e90; affected d6bdcf2e1019351cbc176e963b7756766bdd8721 before 5de04caa46b635e180cecbd164e333eca535db94; affected d6bdcf2e1019351cbc176e963b7756766bdd8721 before 26813881181deb3a32fbb59eadb2599cbe8423f6 |
| Linux / Linux | affected 3.2; unaffected 0 before 3.2; unaffected 5.10.261 through 5.10.*; unaffected 5.15.212 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.97 through 6.12.*; unaffected 6.18.40 through 6.18.*; unaffected 7.1.5 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/6b2ea886ebdae44a2394029844a4e78f58e1587d
- https://git.kernel.org/stable/c/a37625c7b688fcf68a54263528eccbabfd7fa17a
- https://git.kernel.org/stable/c/9f7fe4165a1f1014bdadc8e744c0fd3c2d8c0b89
- https://git.kernel.org/stable/c/08626fcfe12308ca3f8b22c538ba7dee0b2dce7a
- https://git.kernel.org/stable/c/f19a5bc059051143c489dd6f79a0f9c3bfd13aea
- https://git.kernel.org/stable/c/bb3d592c7d6c4ec8ac6640c690ca13298e7e8e90
- https://git.kernel.org/stable/c/5de04caa46b635e180cecbd164e333eca535db94
- https://git.kernel.org/stable/c/26813881181deb3a32fbb59eadb2599cbe8423f6