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CVE-2026-63831: Linux, грешка в паметта

8.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се от съседна мрежа, без особени условия, без вход и без действие от потребителя.

CVE радар: още уязвимости от този вид

  • Експлоатация: няма данни за експлоатация
  • Атаката не може да се автоматизира

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: mac802154: llsec: add skb_cow_data() before in-place crypto llsec_do_encrypt_unauth(), llsec_do_encrypt_auth(), llsec_do_decrypt_unauth(), and llsec_do_decrypt_auth() all perform in-place cryptographic transformations on skb data. They build a scatterlist with sg_init_one() pointing into the skb's linear data area and then pass the same scatterlist as both src and dst to the crypto API (e.g. crypto_skcipher_encrypt/decrypt, crypto_aead_encrypt/decrypt). On the RX path, __ieee802154_rx_handle_packet() clones the received skb before handing it to each subscriber via ieee802154_subif_frame(). The cloned skb shares the same underlying data buffer via reference counting. When llsec_do_decrypt() subsequently modifies this shared buffer in place, it corrupts data that other clones -- potentially belonging to other sockets or subsystems -- still reference. On the TX path, similar data sharing can occur when an skb's head has been cloned (skb_cloned() returns true). The fix is to call skb_cow_data() before performing any in-place crypto operation. skb_cow_data() ensures that the skb's data area is not shared: if the skb head is cloned or the data spans multiple fragments, it copies the data into a private buffer that can be safely modified in place. This is the same pattern used by: - ESP (net/ipv4/esp4.c, net/ipv6/esp6.c) - MACsec (drivers/net/macsec.c) - WireGuard (drivers/net/wireguard/receive.c) - TIPC (net/tipc/crypto.c) Without this guard, in-place crypto on shared skb data leads to: - Silent data corruption of other skb clones - Use-after-free when the crypto API scatterwalk writes through a page that has already been freed by another clone's kfree_skb() - Kernel crashes under concurrent 802.15.4 traffic with security enabled (KASAN/KMSAN reports slab-use-after-free) Found by 0sec (https://0sec.ai) using automated source analysis.

Засегнати продукти

  • Linux Linux: 03556e4d0dbbbf4af9df76f4a3839c86f6afb015 преди 3a2b378b3a9ca75d3518d879148d2ad25b5714a9; 03556e4d0dbbbf4af9df76f4a3839c86f6afb015 преди 7a831bcd0486788283ef35e396d4282ee01bb0d5; 03556e4d0dbbbf4af9df76f4a3839c86f6afb015 преди ff976ef7c39199ebff33c18034636595016db9f0; 03556e4d0dbbbf4af9df76f4a3839c86f6afb015 преди e28e7fd34c449028325322a3f5127b92594b7396; 03556e4d0dbbbf4af9df76f4a3839c86f6afb015 преди 993fd674fe85d114e6a8d3963033d4fbbc2170a8; 03556e4d0dbbbf4af9df76f4a3839c86f6afb015 преди bd968bdd568beacfdf98ec537a87527e85f1d0cf; 03556e4d0dbbbf4af9df76f4a3839c86f6afb015 преди 86d531337ea1ba02d9f2bc830d07c683d9bfaade; 03556e4d0dbbbf4af9df76f4a3839c86f6afb015 преди 84a04eb5b210643bd67aab81ff805d32f62aa865
  • Linux Linux: 3.16; преди 3.16; 5.10.260 до 5.10.*; 5.15.211 до 5.15.*; 6.1.177 до 6.1.*; 6.6.144 до 6.6.*; 6.12.95 до 6.12.*; 6.18.38 до 6.18.*; 7.1.3 до 7.1.*; от 7.2 нататък

Вид слабост

История

  • 19 юли 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-63831: Linux, грешка в паметта | freedomonline.bg