Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: ila: reload IPv6 header after pskb_may_pull in checksum adjust ila_csum_adjust_transport() caches ip6h = ipv6_hdr(skb) before calling pskb_may_pull(). On a non-linear skb whose transport header sits in a page fragment, pskb_may_pull() can call __pskb_pull_tail() / pskb_expand_head() and free the old skb head, leaving ip6h dangling; the following get_csum_diff(ip6h, p) then reads freed memory. ila_update_ipv6_locator() uses ip6h (and the iaddr derived from it) again after the csum-adjust call and additionally writes the new locator through that pointer. Impact: a remote IPv6 packet routed through a configured ILA csum-adjust-transport route or receive-side mapping triggers a slab-use-after-free in ila_update_ipv6_locator() (KASAN). The route or mapping requires CAP_NET_ADMIN to configure, but trigger packets are unauthenticated once it exists. Reload ip6h after each pskb_may_pull() in ila_csum_adjust_transport() before the csum-diff read. In ila_update_ipv6_locator() only the ILA_CSUM_ADJUST_TRANSPORT case pulls the skb, so reload ip6h and iaddr in that case alone before the destination-address write; the neutral-map modes never pull and keep their cached pointers.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 33f11d16142b06588eedfc1dd8cf93790979a712 before e451a904606c571f731ef7a06b3398619dce5300; affected 33f11d16142b06588eedfc1dd8cf93790979a712 before 1eadcb43893b897ade85ac5bf5c618054bc3c655; affected 33f11d16142b06588eedfc1dd8cf93790979a712 before ba353caafb06ccee57b78d3254e3cebf1dea4a93; affected 33f11d16142b06588eedfc1dd8cf93790979a712 before 896a9512d0d83c2a4b357e5585b7b62a8e3f95c1; affected 33f11d16142b06588eedfc1dd8cf93790979a712 before 7097a0280b178237265681be66d1bef11d15894b; affected 33f11d16142b06588eedfc1dd8cf93790979a712 before 472aba2603ca74c4f7722cb0c0296942b0776b8d; affected 33f11d16142b06588eedfc1dd8cf93790979a712 before c6a13ae00dab3a1a8c7cf2f843f0fc9e8d4b0ccc; affected 33f11d16142b06588eedfc1dd8cf93790979a712 before 92d3817649df2b0b6a008a686c8275c88d7ef594 |
| Linux / Linux | affected 4.5; unaffected 0 before 4.5; unaffected 5.10.265 through 5.10.*; unaffected 5.15.216 through 5.15.*; unaffected 6.1.183 through 6.1.*; unaffected 6.6.148 through 6.6.*; unaffected 6.12.101 through 6.12.*; unaffected 6.18.42 through 6.18.*; unaffected 7.1.6 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/e451a904606c571f731ef7a06b3398619dce5300
- https://git.kernel.org/stable/c/1eadcb43893b897ade85ac5bf5c618054bc3c655
- https://git.kernel.org/stable/c/ba353caafb06ccee57b78d3254e3cebf1dea4a93
- https://git.kernel.org/stable/c/896a9512d0d83c2a4b357e5585b7b62a8e3f95c1
- https://git.kernel.org/stable/c/7097a0280b178237265681be66d1bef11d15894b
- https://git.kernel.org/stable/c/472aba2603ca74c4f7722cb0c0296942b0776b8d
- https://git.kernel.org/stable/c/c6a13ae00dab3a1a8c7cf2f843f0fc9e8d4b0ccc
- https://git.kernel.org/stable/c/92d3817649df2b0b6a008a686c8275c88d7ef594
ADP enrichment
No English description supplied.
No references supplied.