Description
In the Linux kernel, the following vulnerability has been resolved: net: guard timestamp cmsgs to real error queue skbs skb_is_err_queue() treats PACKET_OUTGOING as the sole marker for an skb from sk_error_queue. That assumption is not true for AF_PACKET sockets: outgoing packet taps are also delivered to packet sockets with skb->pkt_type == PACKET_OUTGOING, but their skb->cb is owned by AF_PACKET instead of struct sock_exterr_skb. If such an skb is received with timestamping enabled, the generic timestamp cmsg path can read AF_PACKET control-buffer state as sock_exterr_skb::opt_stats. With SO_RXQ_OVFL enabled, the packet drop counter overlaps opt_stats. An odd drop count makes the path emit SCM_TIMESTAMPING_OPT_STATS with skb->len and skb->data. For non-linear skbs this copies past the linear head and can trigger hardened usercopy or disclose adjacent heap contents. Keep skb_is_err_queue() local to net/socket.c, but make it verify that the PACKET_OUTGOING marker is paired with the sock_rmem_free destructor installed by sock_queue_err_skb(). AF_PACKET receive skbs use normal receive ownership and no longer pass as error-queue skbs, while legitimate sk_error_queue entries keep the PACKET_OUTGOING marker and sock_rmem_free ownership.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | 8605330aac5a5785630aec8f64378a54891937cc to <24a0d548d3a765cd4558224e4f8e06e14cba26e3; 8605330aac5a5785630aec8f64378a54891937cc to <71ff5cdd5da61d0438e902aa0fd68c28bc901abe; 8605330aac5a5785630aec8f64378a54891937cc to <ad9a0374ee6d11048e1f74cd5180bad58b9848b4; 8605330aac5a5785630aec8f64378a54891937cc to <b903e9b5629ec8dd6db92174070045bf81ad7060; 8605330aac5a5785630aec8f64378a54891937cc to <e0665b2a8e90bb08bd205062c75662b502d31797; 8605330aac5a5785630aec8f64378a54891937cc to <3dde4fb941fa5649ab809f6cd3e20e0c424a4e31; 8605330aac5a5785630aec8f64378a54891937cc to <eb51a9ad3ceb01bc6c0fb608dbc856e03ee6f24a; 8605330aac5a5785630aec8f64378a54891937cc to <1ee90b77b727df903033db873c75caac5c27ec98; cdaf15b43bd31003220cb080bcbbd57787a2fca9; 4.10.14 to <4.11 |
| Linux | Linux | 4.11; 0 to <4.11; 5.10.259 to <=5.10.*; 5.15.210 to <=5.15.*; 6.1.176 to <=6.1.*; 6.6.143 to <=6.6.*; 6.12.94 to <=6.12.*; 6.18.36 to <=6.18.*; 7.0.13 to <=7.0.*; 7.1 to <=* |
References
- https://git.kernel.org/stable/c/24a0d548d3a765cd4558224e4f8e06e14cba26e3
- https://git.kernel.org/stable/c/71ff5cdd5da61d0438e902aa0fd68c28bc901abe
- https://git.kernel.org/stable/c/ad9a0374ee6d11048e1f74cd5180bad58b9848b4
- https://git.kernel.org/stable/c/b903e9b5629ec8dd6db92174070045bf81ad7060
- https://git.kernel.org/stable/c/e0665b2a8e90bb08bd205062c75662b502d31797
- https://git.kernel.org/stable/c/3dde4fb941fa5649ab809f6cd3e20e0c424a4e31
- https://git.kernel.org/stable/c/eb51a9ad3ceb01bc6c0fb608dbc856e03ee6f24a
- https://git.kernel.org/stable/c/1ee90b77b727df903033db873c75caac5c27ec98
Generated from the official CVE List on 25 Jun 2026 10:14 UTC.