{"id":"CVE-2022-48962","state":"PUBLISHED","title":"net: hisilicon: Fix potential use-after-free in hisi_femac_rx()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hisilicon: Fix potential use-after-free in hisi_femac_rx()\n\nThe skb is delivered to napi_gro_receive() which may free it, after\ncalling this, dereferencing skb may trigger use-after-free.","publishedAt":"2024-10-21T20:05:46.514Z","updatedAt":"2026-08-05T08:53:09.824Z","severity":{"score":8.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"542ae60af24f02e130e62cb3b7c23163a2350056","status":"affected","lessThan":"3501da8eb6d0f5f114a09ec953c54423f6f35885","versionType":"git"},{"version":"542ae60af24f02e130e62cb3b7c23163a2350056","status":"affected","lessThan":"196e12671cb629d9f3b77b4d8bec854fc445533a","versionType":"git"},{"version":"542ae60af24f02e130e62cb3b7c23163a2350056","status":"affected","lessThan":"aceec8ab752428d8e151321479e82cc1a40fee2e","versionType":"git"},{"version":"542ae60af24f02e130e62cb3b7c23163a2350056","status":"affected","lessThan":"e71a46cc8c9ad75f3bb0e4b361e81f79c0214cca","versionType":"git"},{"version":"542ae60af24f02e130e62cb3b7c23163a2350056","status":"affected","lessThan":"296a50aa8b2982117520713edc1375777a9f8506","versionType":"git"},{"version":"542ae60af24f02e130e62cb3b7c23163a2350056","status":"affected","lessThan":"6f4798ac9c9e98f41553c4f5e6c832c8860a6942","versionType":"git"},{"version":"542ae60af24f02e130e62cb3b7c23163a2350056","status":"affected","lessThan":"8595a2db8eb0ffcbb466eb9f4a7507a5ba06ebb9","versionType":"git"},{"version":"542ae60af24f02e130e62cb3b7c23163a2350056","status":"affected","lessThan":"4640177049549de1a43e9bc49265f0cdfce08cfd","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/hisilicon/hisi_femac.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.8","versionType":"semver"},{"version":"4.9.336","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.302","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.269","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.227","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.159","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.83","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.0.13","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/hisilicon/hisi_femac.c"]}],"references":["https://git.kernel.org/stable/c/3501da8eb6d0f5f114a09ec953c54423f6f35885","https://git.kernel.org/stable/c/196e12671cb629d9f3b77b4d8bec854fc445533a","https://git.kernel.org/stable/c/aceec8ab752428d8e151321479e82cc1a40fee2e","https://git.kernel.org/stable/c/e71a46cc8c9ad75f3bb0e4b361e81f79c0214cca","https://git.kernel.org/stable/c/296a50aa8b2982117520713edc1375777a9f8506","https://git.kernel.org/stable/c/6f4798ac9c9e98f41553c4f5e6c832c8860a6942","https://git.kernel.org/stable/c/8595a2db8eb0ffcbb466eb9f4a7507a5ba06ebb9","https://git.kernel.org/stable/c/4640177049549de1a43e9bc49265f0cdfce08cfd"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/48xxx/CVE-2022-48962.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-48962","state":"PUBLISHED","datePublished":"2024-10-21T20:05:46.514Z","dateUpdated":"2026-08-05T08:53:09.824Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-08-22T01:27:53.628Z"},"containers":{"cna":{"title":"net: hisilicon: Fix potential use-after-free in hisi_femac_rx()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hisilicon: Fix potential use-after-free in hisi_femac_rx()\n\nThe skb is delivered to napi_gro_receive() which may free it, after\ncalling this, dereferencing skb may trigger use-after-free."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"542ae60af24f02e130e62cb3b7c23163a2350056","status":"affected","lessThan":"3501da8eb6d0f5f114a09ec953c54423f6f35885","versionType":"git"},{"version":"542ae60af24f02e130e62cb3b7c23163a2350056","status":"affected","lessThan":"196e12671cb629d9f3b77b4d8bec854fc445533a","versionType":"git"},{"version":"542ae60af24f02e130e62cb3b7c23163a2350056","status":"affected","lessThan":"aceec8ab752428d8e151321479e82cc1a40fee2e","versionType":"git"},{"version":"542ae60af24f02e130e62cb3b7c23163a2350056","status":"affected","lessThan":"e71a46cc8c9ad75f3bb0e4b361e81f79c0214cca","versionType":"git"},{"version":"542ae60af24f02e130e62cb3b7c23163a2350056","status":"affected","lessThan":"296a50aa8b2982117520713edc1375777a9f8506","versionType":"git"},{"version":"542ae60af24f02e130e62cb3b7c23163a2350056","status":"affected","lessThan":"6f4798ac9c9e98f41553c4f5e6c832c8860a6942","versionType":"git"},{"version":"542ae60af24f02e130e62cb3b7c23163a2350056","status":"affected","lessThan":"8595a2db8eb0ffcbb466eb9f4a7507a5ba06ebb9","versionType":"git"},{"version":"542ae60af24f02e130e62cb3b7c23163a2350056","status":"affected","lessThan":"4640177049549de1a43e9bc49265f0cdfce08cfd","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/hisilicon/hisi_femac.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.8","versionType":"semver"},{"version":"4.9.336","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.302","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.269","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.227","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.159","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.83","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.0.13","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/hisilicon/hisi_femac.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/3501da8eb6d0f5f114a09ec953c54423f6f35885"},{"url":"https://git.kernel.org/stable/c/196e12671cb629d9f3b77b4d8bec854fc445533a"},{"url":"https://git.kernel.org/stable/c/aceec8ab752428d8e151321479e82cc1a40fee2e"},{"url":"https://git.kernel.org/stable/c/e71a46cc8c9ad75f3bb0e4b361e81f79c0214cca"},{"url":"https://git.kernel.org/stable/c/296a50aa8b2982117520713edc1375777a9f8506"},{"url":"https://git.kernel.org/stable/c/6f4798ac9c9e98f41553c4f5e6c832c8860a6942"},{"url":"https://git.kernel.org/stable/c/8595a2db8eb0ffcbb466eb9f4a7507a5ba06ebb9"},{"url":"https://git.kernel.org/stable/c/4640177049549de1a43e9bc49265f0cdfce08cfd"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:A - The bug is in the Hisilicon FEMAC Fast Ethernet MAC RX path (hisi_femac_rx), reached when frames arrive on the L2 Ethernet segment of Hi3516CV300 and similar SoCs; an attacker must be on the same LAN/broadcast domain to deliver those frames, matching Adjacent scoring for Ethernet NIC RX UAFs of this class.\nAC:L - An adjacent peer can reliably force GRO merge (GRO_MERGED_FREE) by bursting same-flow TCP segments so napi_gro_receive() frees the skb before the immediate skb->len read; no attacker-uncontrollable race or rare config is required.\nPR:N - Frame delivery runs in softirq/NAPI with no host authentication or capability check; any unauthenticated peer that can put Ethernet frames on the wire triggers the path.\nUI:N - RX interrupt and NAPI processing run automatically once the interface is up; no victim action such as opening a file or confirming a prompt is required.\nS:U - The use-after-free corrupts host-kernel sk_buff heap state within the same OS security authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - This is a heap use-after-free of an sk_buff after napi_gro_receive may free it; reclaiming the general-purpose slab object enables disclosure of reused kernel memory via the dangling skb->len read, scored High per UAF guidance.\nI:H - sk_buff use-after-free in a general-purpose slab is a classic heap-grooming primitive that can yield attacker-controlled object reuse and control-flow hijacking, so integrity impact is High per kernel UAF scoring guidance.\nA:H - Dereferencing a freed sk_buff can oops/panic the kernel, and an adjacent attacker can repeatedly inject frames to crash the host at 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