{ "dataType": "CVE_RECORD", "cveMetadata": { "cveId": "CVE-2024-26877", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-19T14:20:24.185Z", "datePublished": "2024-04-17T10:27:35.197Z", "dateUpdated": "2026-08-05T11:28:04.113Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:28:04.113Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: xilinx - call finalize with bh disabled\n\nWhen calling crypto_finalize_request, BH should be disabled to avoid\ntriggering the following calltrace:\n\n ------------[ cut here ]------------\n WARNING: CPU: 2 PID: 74 at crypto/crypto_engine.c:58 crypto_finalize_request+0xa0/0x118\n Modules linked in: cryptodev(O)\n CPU: 2 PID: 74 Comm: firmware:zynqmp Tainted: G O 6.8.0-rc1-yocto-standard #323\n Hardware name: ZynqMP ZCU102 Rev1.0 (DT)\n pstate: 40000005 (nZcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n pc : crypto_finalize_request+0xa0/0x118\n lr : crypto_finalize_request+0x104/0x118\n sp : ffffffc085353ce0\n x29: ffffffc085353ce0 x28: 0000000000000000 x27: ffffff8808ea8688\n x26: ffffffc081715038 x25: 0000000000000000 x24: ffffff880100db00\n x23: ffffff880100da80 x22: 0000000000000000 x21: 0000000000000000\n x20: ffffff8805b14000 x19: ffffff880100da80 x18: 0000000000010450\n x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000\n x14: 0000000000000003 x13: 0000000000000000 x12: ffffff880100dad0\n x11: 0000000000000000 x10: ffffffc0832dcd08 x9 : ffffffc0812416d8\n x8 : 00000000000001f4 x7 : ffffffc0830d2830 x6 : 0000000000000001\n x5 : ffffffc082091000 x4 : ffffffc082091658 x3 : 0000000000000000\n x2 : ffffffc7f9653000 x1 : 0000000000000000 x0 : ffffff8802d20000\n Call trace:\n crypto_finalize_request+0xa0/0x118\n crypto_finalize_aead_request+0x18/0x30\n zynqmp_handle_aes_req+0xcc/0x388\n crypto_pump_work+0x168/0x2d8\n kthread_worker_fn+0xfc/0x3a0\n kthread+0x118/0x138\n ret_from_fork+0x10/0x20\n irq event stamp: 40\n hardirqs last enabled at (39): [] _raw_spin_unlock_irqrestore+0x70/0xb0\n hardirqs last disabled at (40): [] el1_dbg+0x28/0x90\n softirqs last enabled at (36): [] kernel_neon_begin+0x8c/0xf0\n softirqs last disabled at (34): [] kernel_neon_begin+0x60/0xf0\n ---[ end trace 0000000000000000 ]---" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL" }, "scenarios": [ { "lang": "en", "value": "AV:N - The impactful instance of this bug is driven by remote traffic: inbound ESP packets to a ZynqMP IPsec endpoint reach `esp_input()` → async `gcm(aes)` on this engine → `esp_input_done()` running in the wrong context, which is exactly the \"iperf over ipsec\" scenario that motivated the `lockdep_assert_in_softirq()` check. Other remote consumers of `gcm(aes)` on the same driver (kTLS, ksmbd/SMB3 encryption) reach the same finalize path.\nAC:L - The BH-enabled completion happens on 100% of requests with no preconditions, and the attacker supplies both sides of the resulting race by simply sustaining packet flow — the racing NET_RX softirq is generated by the attacker's own traffic, and the preemptible/migratable kthread widens the window arbitrarily.\nPR:N - A remote peer needs no account or credential on the target; sending ESP packets that match an existing inbound SA queues the asynchronous decrypt, and the completion callback runs in the bad context regardless of whether the ICV ultimately validates.\nUI:N - No victim action is required — the crypto request is submitted and finalized automatically by the network stack as packets arrive.\nS:U - The context violation, the corrupted lists, the deadlock, and the crash are all confined to the kernel's own security authority; no hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - `xfrm_input()` calls `gro_cells_receive()` unguarded, whose unlocked per-CPU `napi_skbs` list can be corrupted by a concurrent same-CPU `gro_cell_poll()`, yielding use-after-free reads of freed `sk_buff` slab memory that an attacker who reclaims the object can read back; the accompanying WARN also dumps full register and stack state to dmesg.\nI:H - The same unsynchronized `__skb_queue_tail`/`__skb_dequeue` interleaving leaves dangling `next`/`prev` pointers and lets one skb be dequeued and freed twice, giving a double-free/UAF write primitive over reclaimed heap objects; per-CPU `__this_cpu_inc` MIB state and the xfrm replay window are likewise updated without the atomicity they assume.\nA:H - Taking `x->lock` with plain `spin_lock()` from a BH-enabled kthread while softirq paths take it with `spin_lock_bh()` produces same-CPU spinlock recursion — the exact deadlock/hard lockup the assert was added to catch — plus a `WARN_ON_ONCE` splat that panics outright on `panic_on_warn` kernels, and skb list corruption that oopses the machine." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/crypto/xilinx/zynqmp-aes-gcm.c" ], "versions": [ { "version": "4d96f7d48131fefe30d7c1d1e2a23ef37164dbf5", "lessThan": "8a01335aedc50a66d04dd39203c89f4bc8042596", "status": "affected", "versionType": "git" }, { "version": "4d96f7d48131fefe30d7c1d1e2a23ef37164dbf5", "lessThan": "03e6d4e948432a61b35783323b6ab2be071d2619", "status": "affected", "versionType": "git" }, { "version": "4d96f7d48131fefe30d7c1d1e2a23ef37164dbf5", "lessThan": "a71f66bd5f7b9b35a8aaa49e29565eca66299399", "status": "affected", "versionType": "git" }, { "version": "4d96f7d48131fefe30d7c1d1e2a23ef37164dbf5", "lessThan": "23bc89fdce71124cd2126fc919c7076e7cb489cf", "status": "affected", "versionType": "git" }, { "version": "4d96f7d48131fefe30d7c1d1e2a23ef37164dbf5", "lessThan": "9db89b1fb85557892e6681724b367287de5f9f20", "status": "affected", "versionType": "git" }, { "version": "4d96f7d48131fefe30d7c1d1e2a23ef37164dbf5", "lessThan": "dbf291d8ffffb70f48286176a15c6c54f0bb0743", "status": "affected", "versionType": "git" }, { "version": "4d96f7d48131fefe30d7c1d1e2a23ef37164dbf5", "lessThan": "a853450bf4c752e664abab0b2fad395b7ad7701c", "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/crypto/xilinx/zynqmp-aes-gcm.c" ], "versions": [ { "version": "5.7", "status": "affected" }, { "version": "0", "lessThan": "5.7", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.214", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.153", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.83", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.23", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.7.11", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.8.2", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.9", "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": "5.7", "versionEndExcluding": "5.10.214" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "5.15.153" }, { "vulnerable": true, "criteria": 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"dateUpdated": "2024-09-11T17:33:26.216Z" } }, { "x_adpType": "supplier", "providerMetadata": { "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-05-12T11:49:50.041Z" }, "affected": [ { "vendor": "Siemens", "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem", "versions": [ { "status": "affected", "version": "0", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" } ], "references": [ { "url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html" } ] } ] }, "dataVersion": "5.2" }