{"id":"CVE-2023-53342","state":"PUBLISHED","title":"net: marvell: prestera: fix handling IPv4 routes with nhid","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: marvell: prestera: fix handling IPv4 routes with nhid\n\nFix handling IPv4 routes referencing a nexthop via its id by replacing\ncalls to fib_info_nh() with fib_info_nhc().\n\nTrying to add an IPv4 route referencing a nextop via nhid:\n\n    $ ip link set up swp5\n    $ ip a a 10.0.0.1/24 dev swp5\n    $ ip nexthop add dev swp5 id 20 via 10.0.0.2\n    $ ip route add 10.0.1.0/24 nhid 20\n\ntriggers warnings when trying to handle the route:\n\n[  528.805763] ------------[ cut here ]------------\n[  528.810437] WARNING: CPU: 3 PID: 53 at include/net/nexthop.h:468 __prestera_fi_is_direct+0x2c/0x68 [prestera]\n[  528.820434] Modules linked in: prestera_pci act_gact act_police sch_ingress cls_u32 cls_flower prestera arm64_delta_tn48m_dn_led(O) arm64_delta_tn48m_dn_cpld(O) [last unloaded: prestera_pci]\n[  528.837485] CPU: 3 PID: 53 Comm: kworker/u8:3 Tainted: G           O       6.4.5 #1\n[  528.845178] Hardware name: delta,tn48m-dn (DT)\n[  528.849641] Workqueue: prestera_ordered __prestera_router_fib_event_work [prestera]\n[  528.857352] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[  528.864347] pc : __prestera_fi_is_direct+0x2c/0x68 [prestera]\n[  528.870135] lr : prestera_k_arb_fib_evt+0xb20/0xd50 [prestera]\n[  528.876007] sp : ffff80000b20bc90\n[  528.879336] x29: ffff80000b20bc90 x28: 0000000000000000 x27: ffff0001374d3a48\n[  528.886510] x26: ffff000105604000 x25: ffff000134af8a28 x24: ffff0001374d3800\n[  528.893683] x23: ffff000101c89148 x22: ffff000101c89000 x21: ffff000101c89200\n[  528.900855] x20: ffff00013641fda0 x19: ffff800009d01088 x18: 0000000000000059\n[  528.908027] x17: 0000000000000277 x16: 0000000000000000 x15: 0000000000000000\n[  528.915198] x14: 0000000000000003 x13: 00000000000fe400 x12: 0000000000000000\n[  528.922371] x11: 0000000000000002 x10: 0000000000000aa0 x9 : ffff8000013d2020\n[  528.929543] x8 : 0000000000000018 x7 : 000000007b1703f8 x6 : 000000001ca72f86\n[  528.936715] x5 : 0000000033399ea7 x4 : 0000000000000000 x3 : ffff0001374d3acc\n[  528.943886] x2 : 0000000000000000 x1 : ffff00010200de00 x0 : ffff000134ae3f80\n[  528.951058] Call trace:\n[  528.953516]  __prestera_fi_is_direct+0x2c/0x68 [prestera]\n[  528.958952]  __prestera_router_fib_event_work+0x100/0x158 [prestera]\n[  528.965348]  process_one_work+0x208/0x488\n[  528.969387]  worker_thread+0x4c/0x430\n[  528.973068]  kthread+0x120/0x138\n[  528.976313]  ret_from_fork+0x10/0x20\n[  528.979909] ---[ end trace 0000000000000000 ]---\n[  528.984998] ------------[ cut here ]------------\n[  528.989645] WARNING: CPU: 3 PID: 53 at include/net/nexthop.h:468 __prestera_fi_is_direct+0x2c/0x68 [prestera]\n[  528.999628] Modules linked in: prestera_pci act_gact act_police sch_ingress cls_u32 cls_flower prestera arm64_delta_tn48m_dn_led(O) arm64_delta_tn48m_dn_cpld(O) [last unloaded: prestera_pci]\n[  529.016676] CPU: 3 PID: 53 Comm: kworker/u8:3 Tainted: G        W  O       6.4.5 #1\n[  529.024368] Hardware name: delta,tn48m-dn (DT)\n[  529.028830] Workqueue: prestera_ordered __prestera_router_fib_event_work [prestera]\n[  529.036539] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[  529.043533] pc : __prestera_fi_is_direct+0x2c/0x68 [prestera]\n[  529.049318] lr : __prestera_k_arb_fc_apply+0x280/0x2f8 [prestera]\n[  529.055452] sp : ffff80000b20bc60\n[  529.058781] x29: ffff80000b20bc60 x28: 0000000000000000 x27: ffff0001374d3a48\n[  529.065953] x26: ffff000105604000 x25: ffff000134af8a28 x24: ffff0001374d3800\n[  529.073126] x23: ffff000101c89148 x22: ffff000101c89148 x21: ffff00013641fda0\n[  529.080299] x20: ffff000101c89000 x19: ffff000101c89020 x18: 0000000000000059\n[  529.087471] x17: 0000000000000277 x16: 0000000000000000 x15: 0000000000000000\n[  529.094642] x14: 0000000000000003 x13: 00000000000fe400 x12: 0000000000000000\n[  529.101814] x11: 0000000000000002 x10: 0000000000000aa0 x9 : ffff8000013cee80\n[  529.108985] x8 : 0000000000000018 x7 : 000000007b1703f8 x6 \n---truncated---","publishedAt":"2025-09-17T14:56:35.574Z","updatedAt":"2026-05-11T19:43:05.663Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"396b80cb5cc8006a488ea25ef84fae245dc1b43c","status":"affected","lessThan":"a3e5f3b7f25d7b90f3b76d98a946fec6e5f79216","versionType":"git"},{"version":"396b80cb5cc8006a488ea25ef84fae245dc1b43c","status":"affected","lessThan":"8373dca3c1f8a203cecebe3421dbe890c4f08e16","versionType":"git"},{"version":"396b80cb5cc8006a488ea25ef84fae245dc1b43c","status":"affected","lessThan":"2aa71b4b294ee2c3041d085404cea914be9b3225","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/marvell/prestera/prestera_router.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.1","versionType":"semver"},{"version":"6.1.46","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.4.11","status":"unaffected","lessThanOrEqual":"6.4.*","versionType":"semver"},{"version":"6.5","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/marvell/prestera/prestera_router.c"]}],"references":["https://git.kernel.org/stable/c/a3e5f3b7f25d7b90f3b76d98a946fec6e5f79216","https://git.kernel.org/stable/c/8373dca3c1f8a203cecebe3421dbe890c4f08e16","https://git.kernel.org/stable/c/2aa71b4b294ee2c3041d085404cea914be9b3225"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/53xxx/CVE-2023-53342.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53342","state":"PUBLISHED","datePublished":"2025-09-17T14:56:35.574Z","dateUpdated":"2026-05-11T19:43:05.663Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-09-16T16:08:59.565Z"},"containers":{"cna":{"title":"net: marvell: prestera: fix handling IPv4 routes with nhid","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: marvell: prestera: fix handling IPv4 routes with nhid\n\nFix handling IPv4 routes referencing a nexthop via its id by replacing\ncalls to fib_info_nh() with fib_info_nhc().\n\nTrying to add an IPv4 route referencing a nextop via nhid:\n\n    $ ip link set up swp5\n    $ ip a a 10.0.0.1/24 dev swp5\n    $ ip nexthop add dev swp5 id 20 via 10.0.0.2\n    $ ip route add 10.0.1.0/24 nhid 20\n\ntriggers warnings when trying to handle the route:\n\n[  528.805763] ------------[ cut here ]------------\n[  528.810437] WARNING: CPU: 3 PID: 53 at include/net/nexthop.h:468 __prestera_fi_is_direct+0x2c/0x68 [prestera]\n[  528.820434] Modules linked in: prestera_pci act_gact act_police sch_ingress cls_u32 cls_flower prestera arm64_delta_tn48m_dn_led(O) arm64_delta_tn48m_dn_cpld(O) [last unloaded: prestera_pci]\n[  528.837485] CPU: 3 PID: 53 Comm: kworker/u8:3 Tainted: G           O       6.4.5 #1\n[  528.845178] Hardware name: delta,tn48m-dn (DT)\n[  528.849641] Workqueue: prestera_ordered __prestera_router_fib_event_work [prestera]\n[  528.857352] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[  528.864347] pc : __prestera_fi_is_direct+0x2c/0x68 [prestera]\n[  528.870135] lr : prestera_k_arb_fib_evt+0xb20/0xd50 [prestera]\n[  528.876007] sp : ffff80000b20bc90\n[  528.879336] x29: ffff80000b20bc90 x28: 0000000000000000 x27: ffff0001374d3a48\n[  528.886510] x26: ffff000105604000 x25: ffff000134af8a28 x24: ffff0001374d3800\n[  528.893683] x23: ffff000101c89148 x22: ffff000101c89000 x21: ffff000101c89200\n[  528.900855] x20: ffff00013641fda0 x19: ffff800009d01088 x18: 0000000000000059\n[  528.908027] x17: 0000000000000277 x16: 0000000000000000 x15: 0000000000000000\n[  528.915198] x14: 0000000000000003 x13: 00000000000fe400 x12: 0000000000000000\n[  528.922371] x11: 0000000000000002 x10: 0000000000000aa0 x9 : ffff8000013d2020\n[  528.929543] x8 : 0000000000000018 x7 : 000000007b1703f8 x6 : 000000001ca72f86\n[  528.936715] x5 : 0000000033399ea7 x4 : 0000000000000000 x3 : ffff0001374d3acc\n[  528.943886] x2 : 0000000000000000 x1 : ffff00010200de00 x0 : ffff000134ae3f80\n[  528.951058] Call trace:\n[  528.953516]  __prestera_fi_is_direct+0x2c/0x68 [prestera]\n[  528.958952]  __prestera_router_fib_event_work+0x100/0x158 [prestera]\n[  528.965348]  process_one_work+0x208/0x488\n[  528.969387]  worker_thread+0x4c/0x430\n[  528.973068]  kthread+0x120/0x138\n[  528.976313]  ret_from_fork+0x10/0x20\n[  528.979909] ---[ end trace 0000000000000000 ]---\n[  528.984998] ------------[ cut here ]------------\n[  528.989645] WARNING: CPU: 3 PID: 53 at include/net/nexthop.h:468 __prestera_fi_is_direct+0x2c/0x68 [prestera]\n[  528.999628] Modules linked in: prestera_pci act_gact act_police sch_ingress cls_u32 cls_flower prestera arm64_delta_tn48m_dn_led(O) arm64_delta_tn48m_dn_cpld(O) [last unloaded: prestera_pci]\n[  529.016676] CPU: 3 PID: 53 Comm: kworker/u8:3 Tainted: G        W  O       6.4.5 #1\n[  529.024368] Hardware name: delta,tn48m-dn (DT)\n[  529.028830] Workqueue: prestera_ordered __prestera_router_fib_event_work [prestera]\n[  529.036539] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[  529.043533] pc : __prestera_fi_is_direct+0x2c/0x68 [prestera]\n[  529.049318] lr : __prestera_k_arb_fc_apply+0x280/0x2f8 [prestera]\n[  529.055452] sp : ffff80000b20bc60\n[  529.058781] x29: ffff80000b20bc60 x28: 0000000000000000 x27: ffff0001374d3a48\n[  529.065953] x26: ffff000105604000 x25: ffff000134af8a28 x24: ffff0001374d3800\n[  529.073126] x23: ffff000101c89148 x22: ffff000101c89148 x21: ffff00013641fda0\n[  529.080299] x20: ffff000101c89000 x19: ffff000101c89020 x18: 0000000000000059\n[  529.087471] x17: 0000000000000277 x16: 0000000000000000 x15: 0000000000000000\n[  529.094642] x14: 0000000000000003 x13: 00000000000fe400 x12: 0000000000000000\n[  529.101814] x11: 0000000000000002 x10: 0000000000000aa0 x9 : ffff8000013cee80\n[  529.108985] x8 : 0000000000000018 x7 : 000000007b1703f8 x6 \n---truncated---"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"396b80cb5cc8006a488ea25ef84fae245dc1b43c","status":"affected","lessThan":"a3e5f3b7f25d7b90f3b76d98a946fec6e5f79216","versionType":"git"},{"version":"396b80cb5cc8006a488ea25ef84fae245dc1b43c","status":"affected","lessThan":"8373dca3c1f8a203cecebe3421dbe890c4f08e16","versionType":"git"},{"version":"396b80cb5cc8006a488ea25ef84fae245dc1b43c","status":"affected","lessThan":"2aa71b4b294ee2c3041d085404cea914be9b3225","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/marvell/prestera/prestera_router.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.1","versionType":"semver"},{"version":"6.1.46","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.4.11","status":"unaffected","lessThanOrEqual":"6.4.*","versionType":"semver"},{"version":"6.5","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/marvell/prestera/prestera_router.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/a3e5f3b7f25d7b90f3b76d98a946fec6e5f79216"},{"url":"https://git.kernel.org/stable/c/8373dca3c1f8a203cecebe3421dbe890c4f08e16"},{"url":"https://git.kernel.org/stable/c/2aa71b4b294ee2c3041d085404cea914be9b3225"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:43:05.663Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.1.46"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.4.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.5"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"id":"CVE-2023-53342","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-01-14T18:39:02.029523Z"}}}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","description":"CWE-noinfo Not enough information"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-01-14T18:43:02.092Z"}}]}}}