CVE-2026-31501net: ti: icssg-prueth: fix use-after-free of CPPI descriptor in RX path
Updated under an hour ago ()
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In the Linux kernel, the following vulnerability has been resolved: net: ti: icssg-prueth: fix use-after-free of CPPI descriptor in RX path cppi5_hdesc_get_psdata() returns a pointer into the CPPI descriptor. In both emac_rx_packet() and emac_rx_packet_zc(), the descriptor is freed via k3_cppi_desc_pool_free() before the psdata pointer is used by emac_rx_timestamp(), which dereferences psdata[0] and psdata[1]. This constitutes a use-after-free on every received packet that goes through the timestamp path. Defer the descriptor free until after all accesses through the psdata pointer are complete. For emac_rx_packet(), move the free into the requeue label so both early-exit and success paths free the descriptor after all accesses are done. For emac_rx_packet_zc(), move the free to the end of the loop body after emac_dispatch_skb_zc() (which calls emac_rx_timestamp()) has returned.
- CVSS
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 46eeb90f03e03d5e8f7f9f1f0eb0792104fc5f86 before c516c2e06fe580b8d38de60cd407072a5de81506; from 46eeb90f03e03d5e8f7f9f1f0eb0792104fc5f86 before d5827316debcb677679bb014885d7be92c410e11; from 46eeb90f03e03d5e8f7f9f1f0eb0792104fc5f86 before eb8c426c9803beb171f89d15fea17505eb517714 | CNA record |
linux linux_kernel linux:linux_kernel | from 6.15.1 before 6.19.11; 6.15; 7.0; 7.0; 7.0; 7.0; 7.0; 7.0; and 1 more ranges | NVD |
References
- https://git.kernel.org/stable/c/c516c2e06fe580b8d38de60cd407072a5de81506
- https://git.kernel.org/stable/c/d5827316debcb677679bb014885d7be92c410e11patch
- https://git.kernel.org/stable/c/eb8c426c9803beb171f89d15fea17505eb517714patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.