{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-48932","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-08-21T06:06:23.299Z","datePublished":"2024-08-22T03:31:25.989Z","dateUpdated":"2026-08-05T08:52:59.108Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T08:52:59.108Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: DR, Fix slab-out-of-bounds in mlx5_cmd_dr_create_fte\n\nWhen adding a rule with 32 destinations, we hit the following out-of-band\naccess issue:\n\n  BUG: KASAN: slab-out-of-bounds in mlx5_cmd_dr_create_fte+0x18ee/0x1e70\n\nThis patch fixes the issue by both increasing the allocated buffers to\naccommodate for the needed actions and by checking the number of actions\nto prevent this issue when a rule with too many actions is provided."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The bug is reached only when installing an mlx5 FDB software-steering flow rule (TC flower offload → mlx5_eswitch_add_offloaded_rule → mlx5_add_flow_rules → mlx5_cmd_dr_create_fte) via local netlink/TC, not by processing remote packets.\nAC:L - A rule with MLX5_MAX_FLOW_FWD_VPORTS (32) mirred destinations—explicitly supported and commonly paired with a flow counter—deterministically overflows the 32-slot fs_dr_actions/actions arrays; the attacker fully controls the rule and needs no race or uncontrollable layout.\nPR:L - Creating the offloaded TC flower rule requires CAP_NET_ADMIN, which is available to an unprivileged user via user+network namespaces (and to containers granted NET_ADMIN on representors in typical switchdev/NFV deployments), scoring PR:L per kernel guidance for tc/CAP_NET_ADMIN.\nUI:N - The attacker installs the multi-destination TC rule themselves; no separate victim action is required beyond the host already running mlx5 eswitch offloads with SMFS.\nS:U - Impact is slab corruption inside the host kernel’s mlx5 steering path under the same OS authority; this is not a VM escape, IOMMU bypass, or other cross-boundary breakout.\nC:H - The bug is a slab out-of-bounds write of an mlx5dr_action pointer past a kcalloc(32) array into adjacent kmalloc slab objects, which is memory corruption leverageable for kernel information disclosure.\nI:H - Out-of-bounds heap writes of kernel pointers corrupt adjacent slab objects and, per kernel guidance, yield arbitrary-write / control-flow hijacking primitives.\nA:H - The commit documents a KASAN slab-out-of-bounds fault in mlx5_cmd_dr_create_fte, and the resulting heap corruption can oops or panic the kernel."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/mellanox/mlx5/core/steering/fs_dr.c"],"versions":[{"version":"1ffd498901c1134a7cbecf5409e12c064c39cef9","lessThan":"4ad319cdfbe555b4ff67bc608736c46a6930c848","status":"affected","versionType":"git"},{"version":"1ffd498901c1134a7cbecf5409e12c064c39cef9","lessThan":"0aec12d97b2036af0946e3d582144739860ac07b","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/mellanox/mlx5/core/steering/fs_dr.c"],"versions":[{"version":"5.16","status":"affected"},{"version":"0","lessThan":"5.16","status":"unaffected","versionType":"semver"},{"version":"5.16.12","lessThanOrEqual":"5.16.*","status":"unaffected","versionType":"semver"},{"version":"5.17","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"5.16.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"5.17"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/4ad319cdfbe555b4ff67bc608736c46a6930c848"},{"url":"https://git.kernel.org/stable/c/0aec12d97b2036af0946e3d582144739860ac07b"}],"title":"net/mlx5: DR, Fix slab-out-of-bounds in mlx5_cmd_dr_create_fte","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2022-48932","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T15:32:46.595523Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-09-12T17:33:09.982Z"}}]}}