CVE-2022-49698 (GCVE-0-2022-49698)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:24 – Updated: 2025-05-04 08:43
VLAI?
Title
netfilter: use get_random_u32 instead of prandom
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: use get_random_u32 instead of prandom bh might occur while updating per-cpu rnd_state from user context, ie. local_out path. BUG: using smp_processor_id() in preemptible [00000000] code: nginx/2725 caller is nft_ng_random_eval+0x24/0x54 [nft_numgen] Call Trace: check_preemption_disabled+0xde/0xe0 nft_ng_random_eval+0x24/0x54 [nft_numgen] Use the random driver instead, this also avoids need for local prandom state. Moreover, prandom now uses the random driver since d4150779e60f ("random32: use real rng for non-deterministic randomness"). Based on earlier patch from Pablo Neira.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 978d8f9055c3a7c35db2ac99cd2580b993396e33 , < 15cc30ac2a8d7185f8ebf97dd1ddd90a7c79783b (git)
Affected: 978d8f9055c3a7c35db2ac99cd2580b993396e33 , < d0906b0fffc9f19bc42708ca3e84e2089088386c (git)
Affected: 978d8f9055c3a7c35db2ac99cd2580b993396e33 , < 6ce71f83f798be7e1ca68707fec449fbecb38852 (git)
Affected: 978d8f9055c3a7c35db2ac99cd2580b993396e33 , < b1fd94e704571f98b21027340eecf821b2bdffba (git)
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    Linux Linux Affected: 4.18
Unaffected: 0 , < 4.18 (semver)
Unaffected: 5.10.127 , ≤ 5.10.* (semver)
Unaffected: 5.15.51 , ≤ 5.15.* (semver)
Unaffected: 5.18.8 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: use get_random_u32 instead of prandom\n\nbh might occur while updating per-cpu rnd_state from user context,\nie. local_out path.\n\nBUG: using smp_processor_id() in preemptible [00000000] code: nginx/2725\ncaller is nft_ng_random_eval+0x24/0x54 [nft_numgen]\nCall Trace:\n check_preemption_disabled+0xde/0xe0\n nft_ng_random_eval+0x24/0x54 [nft_numgen]\n\nUse the random driver instead, this also avoids need for local prandom\nstate. Moreover, prandom now uses the random driver since d4150779e60f\n(\"random32: use real rng for non-deterministic randomness\").\n\nBased on earlier patch from Pablo Neira."
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    "dateReserved": "2025-02-26T02:21:30.443Z",
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