net: ti: icssg-prueth: fix use-after-free of CPPI descriptor in RX path
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.18.57, 6.19.11
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
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.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From 46eeb90f03e03d5e8f7f9f1f0eb0792104fc5f86 · fixed in c516c2e06fe580b8d38de60cd407072a5de81506; From 46eeb90f03e03d5e8f7f9f1f0eb0792104fc5f86 · fixed in d5827316debcb677679bb014885d7be92c410e11; From 46eeb90f03e03d5e8f7f9f1f0eb0792104fc5f86 · fixed in eb8c426c9803beb171f89d15fea17505eb517714
- Linux Linux
6.15
- KernelLinux
From 6.15.0 · fixed in 6.18.57; From 6.19.0 · fixed in 6.19.11