Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL An LWT_SEG6LOCAL program can invalidate its cached SRH with bpf_lwt_seg6_adjust_srh() and then call bpf_skb_pull_data(). The latter may reallocate skb->head, leaving the per-CPU SRH pointer dangling. Post-program SRH validation then writes through that pointer. Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL programs so the verifier rejects this unsafe helper combination. Other LWT program types continue to expose the helper through lwt_out_func_proto().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 004d4b274e2a1a895a0e5dc66158b90a7d463d44 before 0f38472a2aa8704a6b514c0dfa9c32f3672b8f32; affected 004d4b274e2a1a895a0e5dc66158b90a7d463d44 before cae8674489f26edf7553fdd660599466cbb4c32f; affected 004d4b274e2a1a895a0e5dc66158b90a7d463d44 before 9f9e57b5a3a033f95f49ef9d541340cdbcb80abb; affected 004d4b274e2a1a895a0e5dc66158b90a7d463d44 before df0072be6fc373cb22f9ea854d458b04e32a03cf; affected 004d4b274e2a1a895a0e5dc66158b90a7d463d44 before b9bb0e735460751b620156f800a4279a28573392; affected 004d4b274e2a1a895a0e5dc66158b90a7d463d44 before 37b18688cd18fd86d2f35c212df1611862a26cd5; affected 004d4b274e2a1a895a0e5dc66158b90a7d463d44 before fca71ead7a20290af1e2046983eeafae43d21af1; affected 004d4b274e2a1a895a0e5dc66158b90a7d463d44 before e4a62833adff6ef0fe7c0b90393204fe3c26b5c5 |
| Linux / Linux | affected 4.18; unaffected 0 before 4.18; unaffected 5.10.271 through 5.10.*; unaffected 5.15.222 through 5.15.*; unaffected 6.1.189 through 6.1.*; unaffected 6.6.158 through 6.6.*; unaffected 6.12.112 through 6.12.*; unaffected 6.18.55 through 6.18.*; unaffected 7.2.9 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/0f38472a2aa8704a6b514c0dfa9c32f3672b8f32
- https://git.kernel.org/stable/c/cae8674489f26edf7553fdd660599466cbb4c32f
- https://git.kernel.org/stable/c/9f9e57b5a3a033f95f49ef9d541340cdbcb80abb
- https://git.kernel.org/stable/c/df0072be6fc373cb22f9ea854d458b04e32a03cf
- https://git.kernel.org/stable/c/b9bb0e735460751b620156f800a4279a28573392
- https://git.kernel.org/stable/c/37b18688cd18fd86d2f35c212df1611862a26cd5
- https://git.kernel.org/stable/c/fca71ead7a20290af1e2046983eeafae43d21af1
- https://git.kernel.org/stable/c/e4a62833adff6ef0fe7c0b90393204fe3c26b5c5